What is the difference between a UL 98 and a UL 508 disconnect switch?

Eaton's rotary disconnect catalog (Volume 5 Tab 8, page V5-T8-2) describes UL 98 switches as used as disconnecting means without restrictions. UL 508 switches are manual motor controllers: they can be used as a disconnect only when marked suitable as motor disconnect, are installed on the load side of the branch circuit protective device, and are not used as the main disconnect of a control panel.

How do you read an ABB OT disconnect switch number?

OT16F4N2 is an ABB OT switch-disconnector, size 16, base and DIN-rail mounted and front operated, 4 poles, with the fourth pole switching together with the main contacts (ABB BuyLog Section 9, page 9-39). Its UL ampere rating is 20 A under UL 508 (page 9-55).

What does 1494G-BF3J6 mean?

1494G-BF3J6 is an Allen-Bradley Bulletin 1494G enclosed safety disconnect switch in a standard-size enclosure: B is 30 A, F is a Type 3R/4/12 painted metal enclosure, 3 is 3-pole 3-phase, J is Class J fuse clips and 6 is 600 V AC fuse voltage (Rockwell 1494-TD002F, pages 32 and 34).

How do you read an Eaton R9 disconnect part number?

In R9K3100FJ, R9 is UL 98, K is the UL 98 fusible frame for 60 to 100 A, 3 is three-pole, 100 is 100 A, F is fusible and J means it accepts Class J fuses (Eaton Volume 5 Tab 8, page V5-T8-60).

How do you read a Schneider Electric TeSys VLS disconnect switch number?

In VLS3P100R2, VLS is a disconnect switch, 3P is three poles, 100 is 100 A, R is DIN rail mounting and 2 is the large body size for 63 to 125 A, certified to UL 98 (Square D Digest 179 Section 8, pages 8-9 and 8-10).

How do you read a Siemens VBII safety switch catalog number?

In HF364NR, H is heavy duty, F is fused, 3 is three poles, 6 is 600 V, 4 is 200 A, N is with neutral and R is a Type 3R outdoor enclosure (Siemens Industrial Controls catalog Section 18, page 18/6).

Part number reference · Disconnect switches

Disconnect switch ratings and part numbers

Meisterline Controls scopes and quotes UL 508A control panels. This page lines up fusible and non-fusible disconnect switches from five brands by UL ampere rating and the UL standard each catalog names, then shows how each line’s part numbers are built: series, rating, poles, fusing and options, with the catalog page for each.

Switches side by side

A matching row is a starting point, not an equivalent. Voltage rating, pole count, fuse class, horsepower at your voltage, short-circuit rating, and the handle and shaft all have to be checked before a switch can be substituted. Send the list and we’ll check it against your ratings. Meisterline Controls can also quote the panel it goes into.

Rated current is the UL ampere rating each brand prints for the switch (general-use rating where the catalog names one). UL standard is the standard the catalog states for that series: UL 98 (enclosed and dead-front switches), UL 508 (industrial control equipment), UL 60947-4-1 or UL 489 (titles as Eaton prints them, p.V5-T8-2). One row per rated current and UL standard. Each brand’s series at exactly that rating and standard sit in its column, with the columns in alphabetical order. There is no anchor line and no nearest-size rule: every series is placed by its own catalog rating. “(Recognized)” marks a series the catalog calls UL Recognized. “(Convertible)” marks a switch that serves fusible or non-fusible duty depending on a separately ordered fuse kit; it appears in both tables.

The size number in a part number is not always the UL rating. ABB’s OT16F is rated 20 A and the OT25F 30 A (BuyLog p.9-55); Square D’s Vario and TeSys VLS switches print a UL and an International Electrotechnical Commission (IEC) figure, and the UL figure is used here (Digest p.8-5, p.8-10). Horsepower isn’t published in the catalog data we hold for comparison, so it isn’t a column.

In scope: alternating current (AC) disconnect switches, open and enclosed, from the catalogs listed under the tables. UL 489 molded case switches have their own table below the fusible table. Not in these tables: direct current (DC) and photovoltaic switches, double-throw, changeover and transfer switches, and cam switches.

Non-fusible disconnect switches

Siemens 3LD2, 3LD3 and 3LD5 open switch disconnectors aren’t named in either table. Section 18 prints “Certification according to UL standard: UL 508” and “UL60947-4-1 / UL489” (p.18/55) and “certified according to UL489 … also certified according to UL508” (p.18/87), and our data doesn’t hold their UL listing as stated by the brand. Siemens CFS466J and CFS467L 4-pole switches appear only in a footnote (“also available”, p.18/107), and no UL statement was found for Siemens MMS switches. Double-throw switches are outside these tables.

Rated current (UL)	UL standard	ABB	Allen-Bradley	Eaton	Schneider Electric (Square D)	Siemens
10 A	UL 508	None at this rating	None at this rating	None at this rating	Mini-Vario VN12, Vario V02	None at this rating
16 A	UL 508	None at this rating	None at this rating	R5A	Mini-Vario VN20, Vario V01	3LD open types not named (note above the table)
16 A ¹	Not confirmed in the catalog	No series in this group	No series in this group	No series in this group	TeSys VLS size 1	3LD2 enclosed
20 A	UL 508	EOT520, OT16F	None at this rating	None at this rating	Vario V0, Vario V1	None at this rating
20 A	UL 60947-4-1	OT20G1	None at this rating	None at this rating	None at this rating	None at this rating
25 A	UL 508	None at this rating	None at this rating	R5A	Vario V2	3LD open types not named (note above the table)
25 A	Not confirmed in the catalog	No series in this group	No series in this group	No series in this group	TeSys VLS size 1	3LD2 enclosed
30 A	UL 98	EOT930, OT30F, OT30G3	1494H, 1494U (convertible)	R9C	9422 (Recognized), LK4	CNFS, GNF general duty, HNF heavy duty, LNF general duty, VBNFS (Recognized)
30 A	UL 508	EOT530, OT25F	None at this rating	R5A, T5A	MD	3LD open types not named (note above the table)
30 A	UL 60947-4-1	OT30G1	None at this rating	None at this rating	None at this rating	3LD open types not named (note above the table)
30 A	Not confirmed in the catalog	No series in this group	1494F (convertible), 1494G	No series in this group	No series in this group	3LD2 enclosed, MCS (Recognized) (convertible)
32 A	Not confirmed in the catalog	No series in this group	No series in this group	No series in this group	TeSys VLS size 1	No series in this group
40 A	UL 508	EOT540, OT40F	None at this rating	R5A, T5A	None at this rating	3LD open types not named (note above the table)
40 A	UL 60947-4-1	OT40G1	None at this rating	None at this rating	None at this rating	3LD open types not named (note above the table)
40 A	Not confirmed in the catalog	No series in this group	No series in this group	No series in this group	TeSys VLS size 1	No series in this group
45 A	UL 508	None at this rating	None at this rating	None at this rating	Vario V3	None at this rating
50 A	UL 60947-4-1	OT50G1	None at this rating	None at this rating	None at this rating	None at this rating
60 A	UL 98	EOT960, OT60F, OT60G3	1494H, 1494U (convertible)	R9C	9422 (Recognized), TeSys VLS size 2, LK4	CNFS, GNF general duty, HNF heavy duty, LNF general duty, VBNFS (Recognized)
60 A ²	UL 508	OT63F	None at this rating	R5B, T5B	MD	3LD open types not named (note above the table)
60 A	Not confirmed in the catalog	No series in this group	1494F (convertible), 1494G	No series in this group	TeSys VLS size 1	MCS (Recognized) (convertible)
63 A	UL 508	None at this rating	None at this rating	None at this rating	Vario V4	3LD open types not named (note above the table)
63 A	UL 60947-4-1	OT63G2	None at this rating	None at this rating	None at this rating	3LD open types not named (note above the table)
63 A	Not confirmed in the catalog	No series in this group	No series in this group	No series in this group	No series in this group	3LD2 enclosed
80 A	UL 508	EOT580, OT80F	None at this rating	R5B, T5B	None at this rating	None at this rating
80 A	UL 60947-4-1	OT80G2	None at this rating	None at this rating	None at this rating	None at this rating
100 A ³	UL 98	EOT9100, OT100F, OT100G3, OT160G	1494H, 1494U (convertible)	R9C, R9D	9422 (Recognized), TeSys VLS size 2, LK4	CNFS, GNF general duty, HNF heavy duty, VBNFS (Recognized)
100 A ⁴	UL 508	None at this rating	1494G hazardous location	R5B	Vario V5	3LD open types not named (note above the table)
100 A	UL 60947-4-1	OT100G2	None at this rating	None at this rating	None at this rating	3LD open types not named (note above the table)
100 A	Not confirmed in the catalog	No series in this group	1494F (convertible), 1494G	No series in this group	No series in this group	3LD2 enclosed, MCS (Recognized) (convertible)
115 A	UL 508	None at this rating	None at this rating	None at this rating	Vario V6	None at this rating
125 A	Not confirmed in the catalog	No series in this group	No series in this group	No series in this group	No series in this group	3LD2 enclosed
200 A	UL 98	EOT9200, OT200U	1494H, 1494U (convertible)	R9D	9422 (Recognized), LK4	CNFS, GNF general duty, HNF heavy duty, VBNFS (Recognized)
200 A	Not confirmed in the catalog	No series in this group	1494G	No series in this group	No series in this group	MCS (Recognized) (convertible)
400 A	UL 98	EOT9400, OT400U	1494U (convertible)	R9E	9422 (Recognized), LK4	CNFS, GNF general duty, HNF heavy duty, VBNFS (Recognized)
400 A	Not confirmed in the catalog	No series in this group	1494G	No series in this group	No series in this group	No series in this group
600 A	UL 98	EOT9600, OT600U	1494U (convertible)	R9F	LK4	CNFS, GNF general duty, HNF heavy duty, VBNFS (Recognized)
600 A	Not confirmed in the catalog	No series in this group	1494G	No series in this group	No series in this group	No series in this group
800 A	UL 98	OT800U	None at this rating	R9G	LK4	CNFS, HNF heavy duty
1000 A	UL 98	None at this rating	None at this rating	R9G	LK4	None at this rating
1200 A	UL 98	OT1200U	None at this rating	R9G	None at this rating	HNF heavy duty
1600 A	UL 98	OT1600U	None at this rating	None at this rating	None at this rating	None at this rating
2000 A	UL 98	OT2000U	None at this rating	None at this rating	None at this rating	None at this rating

These rows hold series whose UL standard the catalog does not settle. The Allen-Bradley 1494G heavy industrial and 1494F have no standard placed under their columns in the standards row of 1494-TD002F. The Siemens 3LD2 enclosed is described as listed and marked suitable for use as a motor disconnect, with no standard named. The Siemens MCS is described as UL Recognized, with no standard named. The Square D TeSys VLS size 1, 16 through 63 A, is given as UL 508 on pages 8-2 and 8-9 and as UL 60947-4-1 on page 8-10.

The ABB EOT560 enclosed UL 508 switch is left off this row. BuyLog Section 9 prints it as 50 A on page 9-94 and as 60 A on pages 9-93 and 9-95.

ABB’s OT160G is UL Listed at 100 A and UL Recognized at 125 A (BuyLog Section 9, p.9-43), so it sits in the 100 A row.

⁴

Eaton prints “Suitable as Motor Disconnect” for R5 switches from 16 to 80 A (p.V5-T8-10). The 100 A R5B is outside that range. Allen-Bradley’s hazardous-location 1494G is printed as one catalog number at this rating, 1494G-DH3N-203W (1494-TD002F p.45).

Fusible disconnect switches

Rated current (UL)	UL standard	ABB	Allen-Bradley	Eaton	Schneider Electric (Square D)	Siemens
30 A	UL 98	EOS930, OS30	1494H, 1494U (convertible)	R9I, R9J	9422 (Recognized), GS1, GS2	CFS, GF general duty, HF heavy duty, VBFS (Recognized)
30 A ¹	UL 489	None at this rating	None at this rating	R4H	None at this rating	None at this rating
30 A ²	Not confirmed in the catalog	No series in this group	1494F (convertible), 1494G	No series in this group	No series in this group	MCS (Recognized) (convertible)
60 A	UL 98	EOS960, OS60	1494H, 1494U (convertible)	R9J, R9K	9422 (Recognized), GS2	CFS, GF general duty, HF heavy duty, VBFS (Recognized)
60 A	Not confirmed in the catalog	No series in this group	1494F (convertible), 1494G	No series in this group	No series in this group	MCS (Recognized) (convertible)
100 A	UL 98	EOS9100, OS100	1494H, 1494U (convertible)	R9K	9422 (Recognized), GS2	CFS, GF general duty, HF heavy duty, VBFS (Recognized)
100 A	Not confirmed in the catalog	No series in this group	1494F (convertible), 1494G	No series in this group	No series in this group	MCS (Recognized) (convertible)
200 A	UL 98	EOS9200, OS200	1494H, 1494U (convertible)	R9L	9422 (Recognized), GS2	CFS, GF general duty, HF heavy duty, VBFS (Recognized)
200 A	Not confirmed in the catalog	No series in this group	1494G	No series in this group	No series in this group	MCS (Recognized) (convertible)
400 A	UL 98	EOS9400, OS400	1494U (convertible)	R9M	9422 (Recognized), GS2	CFS, GF general duty, HF heavy duty, VBFS (Recognized)
400 A	Not confirmed in the catalog	No series in this group	1494G	No series in this group	No series in this group	No series in this group
600 A	UL 98	EOS9600, OS600	1494U (convertible)	R9N	GS2	CFS, GF general duty, HF heavy duty, VBFS (Recognized)
600 A	Not confirmed in the catalog	No series in this group	1494G	No series in this group	No series in this group	No series in this group
800 A	UL 98	OS800	None at this rating	R9N	GS2	CFS, HF heavy duty
1200 A	UL 98	OS1200	None at this rating	None at this rating	None at this rating	HF heavy duty

Eaton’s R4H is the 30 A compact (H-frame) fusible switch, listed to UL 489 under file E305341, where the other R9 fusible frames are listed to UL 98 (p.V5-T8-26, p.V5-T8-60).

These rows hold series whose catalog doesn’t settle the UL standard. The note under the 16 A row of the non-fusible table names each one.

Molded case switches (UL 489)

A molded case switch is built in a molded case circuit breaker frame and listed to UL 489, without overcurrent protection for the circuit it feeds (Rockwell’s table reads “Molded case switch (no overcurrent protection)”, 140G-TD101E p.93). Square D lists its PowerPacT switches as automatic molded case switches and Siemens lists its Sentron switches as self-protective; check each catalog’s note on what that means before substituting one for another. Rows are the rated current; each cell names the frames at that rating, with poles, voltage and the catalog page (PDF page numbers in the documents named under the table). Lines the brand is phasing down are marked.

Rated current	ABB	Allen-Bradley	Eaton	Schneider Electric (Square D)	Siemens
50 A	None at this rating	None at this rating	QUICKLAG HQP, BAB, QC (1 to 3 poles, 240 V) V4-T1 pp.6, 12, 20	None at this rating	None at this rating
60 A	Q-Line TQB, TQC (2, 3 poles, 240 V) BuyLog pp.42, 46	None at this rating	QUICKLAG HQP, BAB, QC (1 to 3 poles, 240 V) V4-T1 pp.6, 12, 20; Series C G-frame GD (3 poles, 480 V) V4-T2 p.238 (phasing down)	QO, QOU non-automatic (2, 3 poles, 240 V) Sec.7 pp.11, 21	None at this rating
100 A	E150 TED, TEB (1 to 3 poles, up to 600 V) BuyLog pp.72, 186; Q-Line TQB, TQC (2, 3 poles, 240 V) BuyLog pp.42, 46	None at this rating	Power Defense PD-2 (2 to 4 poles, 600 V) V4-T2 p.32; QUICKLAG HQP, BAB, QC (1 to 3 poles, 240 V) V4-T1 pp.6, 12, 20; Series C GD, EHD, FD, HFD (2 to 4 poles, up to 600 V) V4-T2 pp.238, 260 (phasing down)	None at this rating	3VA5 (2, 3 poles, up to 600 V) Sect.17 p.58; Sentron ED, CED (2, 3 poles, up to 600 V) Sect.17 p.125
125 A	Tmax XT1, XT2 (3, 4 poles, up to 600 V) BuyLog pp.87, 94	140G frames G, H (3, 4 poles, 600 V) TD101E p.93	Power Defense PD-1 (3, 4 poles, 600Y/347 V) V4-T2 p.23; Series G EGK (3, 4 poles, 600 V) V4-T2 p.175 (phasing down)	PowerPacT B (2, 3 poles, 600 V) Sec.7 p.52; QOU non-automatic (2 poles, 240 V) Sec.7 p.21	Sentron ED, CED (2, 3 poles, up to 600 V) Sect.17 p.125
150 A	Tmax XT4 (3, 4 poles, 600 V) Tmax XT p.300; E150 TED (3 poles, up to 600 V) BuyLog p.72	None at this rating	Power Defense PD-2 (2 to 4 poles, 600 V) V4-T2 p.32; Series C FD, HFD (2 to 4 poles, 600 V) V4-T2 p.260 (phasing down)	PowerPacT H (2, 3 poles, 600 V) Sec.7 p.52	3VA5 (2, 3 poles, 600 V) Sect.17 p.58
175 A	None at this rating	None at this rating	None at this rating	PowerPacT J (2, 3 poles, 600 V) Sec.7 p.52	None at this rating
225 A	Tmax XT3 (3, 4 poles, 480 V) BuyLog p.95	140G frame I (3, 4 poles, 600 V) TD101E p.93	Power Defense PD-2 (2 to 4 poles, 600 V) V4-T2 p.32; Series C FD, HFD (2 to 4 poles, 600 V) V4-T2 p.260 (phasing down)	PowerPacT Q (2, 3 poles, 240 V) Sec.7 p.52	None at this rating
250 A	Tmax XT4 (3, 4 poles, 600 V) Tmax XT p.300	140G frame J (3, 4 poles, 600 V) TD101E p.93	None at this rating	PowerPacT J (2, 3 poles, 600 V) Sec.7 p.52	3VA5 (2, 3 poles, 600 V) Sect.17 p.58; Sentron HQR, FXD, HFXD, CFD (2, 3 poles, up to 600 V) Sect.17 p.125
400 A	Tmax XT5 (3, 4 poles, 600 V) Tmax XT p.333	140G frame K (3, 4 poles, 600 V) TD102A p.50; 140G2 frame K (3 poles) TD101E p.93	Power Defense PD-3 (2 to 4 poles, 600 V) V4-T2 p.44; Series C DK, KD, HKD, KDB (2 to 4 poles, up to 600 V) V4-T2 p.282 (phasing down)	PowerPacT L (3, 4 poles, 600 V) Sec.7 p.52	3VA5, 3VA6 (2, 3 poles, 600 V) Sect.17 p.58; Sentron JXD, HJXD, CJD (2, 3 poles, up to 600 V) Sect.17 p.125
600 A	Tmax XT5 (3, 4 poles, 600 V) Tmax XT p.333	140G2 frame L (3 poles) TD101E p.93	Power Defense PD-3 (2 to 4 poles, 600 V) V4-T2 p.44; Series C LD, LDB, HLD (2 to 4 poles, 600 V) V4-T2 p.293 (phasing down)	PowerPacT L, P (2 to 4 poles, up to 600 V) Sec.7 p.52	3VA5, 3VA6 (2, 3 poles, 600 V) Sect.17 p.58; Sentron LXD, HLXD, CLD (3 poles, 600 V) Sect.17 p.125
800 A	Tmax XT6 (3, 4 poles, 600 V) Tmax XT p.343	140G frame M (3, 4 poles, 600 V) TD101E p.93	Power Defense PD-4 (2 to 4 poles, 600 V) V4-T2 p.58; PD-5 (3, 4 poles, 600 V) V4-T2 pp.71, 72; Series C MDL, HMDL (2, 3 poles, 600 V) V4-T2 p.305 (phasing down); Series G NGK (3, 4 poles, 690 V) V4-T2 p.185 (phasing down)	PowerPacT M, P (2, 3 poles, up to 600 V) Sec.7 p.52	3VA5 (2 to 4 poles, 600 V) Sect.17 p.58; Sentron LMXD, MXD, CMD (3 poles, 600 V) Sect.17 p.125
1000 A	Tmax XT7, XT7 M (3, 4 poles, 600 V) BuyLog pp.119, 129	None at this rating	None at this rating	PowerPacT P (2, 3 poles, up to 600 V) Sec.7 p.52	3VA5 (2, 3 poles, 600 V) Sect.17 p.58
1200 A	Tmax XT7, XT7 M (3, 4 poles, 600 V) BuyLog p.129; Tmax XT p.370	140G frame N (3, 4 poles, 600 V) TD101E p.93	Power Defense PD-5 (3, 4 poles, 600 V) V4-T2 p.72; Series G NGK (3, 4 poles, 690 V) V4-T2 p.185 (phasing down)	PowerPacT P, R (2, 3 poles, up to 600 V) Sec.7 p.52	3VA5 (2, 3 poles, 600 V) Sect.17 p.58; Sentron NXD, CND (3 poles, 600 V) Sect.17 p.125
1250 A	None at this rating	None at this rating	Series G NGK (3 poles, 690 V) V4-T2 p.185 (phasing down)	None at this rating	None at this rating
1600 A	None at this rating	None at this rating	Power Defense PD-6 (3, 4 poles, 600 V) V4-T2 p.80; Series G RGK (3, 4 poles, 600 V) V4-T2 p.195 (phasing down)	PowerPacT R (2, 3 poles, 600 V) Sec.7 p.52	3VA5 (3 poles, 600 V) Sect.17 p.58; Sentron PXD (3 poles, 600 V) Sect.17 p.125
2000 A	None at this rating	None at this rating	Power Defense PD-6 (3, 4 poles, 600 V) V4-T2 p.80; Series G RGK (3, 4 poles, 600 V) V4-T2 p.195 (phasing down)	PowerPacT R (2, 3 poles, 600 V) Sec.7 p.52	3VA5 (3 poles, 600 V) Sect.17 p.58; Sentron RXD (3 poles, 600 V) Sect.17 p.125
2500 A	None at this rating	140G frame R (3, 4 poles) TD101E p.93	None at this rating	PowerPacT R (2, 3 poles, 600 V) Sec.7 p.52	None at this rating

Sources (PDF pages): ABB US BuyLog Section 6, 9AKK108467A9438 (2026-10), and SACE Tmax XT UL/CSA catalog 1SDC210200D0206 (2024-08). Allen-Bradley: Rockwell 140G-TD101E (2025-08) and 140G-TD102A (2025-07). Eaton: Volume 4 Tab 1, miniature circuit breakers, and Volume 4 Tab 2, molded case circuit breakers, CA08100005E (2026-07 and 2026-04). Schneider Electric: Square D Digest 179, Section 7 (2026-09). Siemens: Industrial Controls catalog Section 17 (2026-02).

Ratings and standards: ABB US BuyLog Section 9, 9AKK108467A9441 (2026-01), pages 9-4 to 9-11, 9-37 to 9-47, 9-55 to 9-62, 9-93 to 9-95, 9-104 and 9-105. Allen-Bradley: Rockwell 1494-TD002F-EN-P (2026-03), pages 3, 5 to 7, 26, 32 to 35, 45 and 47. Eaton: Volume 5 Tab 8, CA08100006E (2026-07), pages V5-T8-2, -5, -6, -10, -12, -13, -18, -19, -26 and -28 to -31. Schneider Electric: Square D Digest 179, Section 8 (2026-04), pages 8-2 to 8-5, 8-8 to 8-10, 8-24 to 8-28 (LK4 and GS, UL 98 with UL file E191098 on page 8-2) and 8-33. Siemens: Industrial Controls catalog Section 18 (2026-06), pages 18/3, 18/11 to 18/16, 18/23 to 18/25, 18/96, 18/98, 18/99, 18/103, 18/105 to 18/107 and 18/110 to 18/112. A series is placed in these tables only where the catalog states its UL listing or recognition. Enclosed switches are shown for ABB (EOT, EOS), Allen-Bradley (1494G, 1494H) and Siemens (VBII, 3LD2 enclosed), from the catalogs above.

UL 508 and UL 98 switches are applied differently. Eaton’s catalog (p.V5-T8-2) describes UL 98 switches as “used as disconnecting means without restrictions”, and UL 508 switches as manual motor controllers that can be used as a disconnect only when marked “suitable as motor disconnect”, installed on the load side of the branch circuit protective device, and not used as the main disconnect of a panel. Square D’s catalog describes its Vario switches as UL 508 manual motor controllers marked “Suitable as Motor Disconnect”, for installation on the load side of the motor branch circuit protection (p.8-5). A UL 508 row and a UL 98 row at the same current are not interchangeable.

The switch, its handle and its shaft are often separate part numbers. ABB prints “Handle and shaft are not included” on its OT ordering pages (p.9-55), Eaton builds a switch from switch body, shaft and external handle (p.V5-T8-6), and Square D builds an LK or GS switch from switch, shaft and handle (p.8-24). Allen-Bradley’s 1494F and 1494U and Siemens’ MCS take fusing through a separately ordered kit (1494-TD002F p.7 and p.26; Section 18 p.18/103). Count those parts when comparing lines.

How each line’s part numbers are built

Each section uses only that line’s own catalog, with the page for every code. Where two pages of the same catalog disagree, the item is left out and noted.

ABB OT, OS and enclosed EOT/EOS
Allen-Bradley 1494G, 1494H, 1494F and 1494U
Eaton R5 and R9
Schneider Electric Vario and TeSys VLS
Siemens VBII, CFS, CNFS and MCS

ABB OT, OS and enclosed EOT/EOS

Source: ABB US BuyLog Section 9, 9AKK108467A9441 (2026-01). ABB prints a type designation key for each range.

OT16 to OT160 non-fusible (p.9-39)

Segment	Code	Meaning
Brand	OT	ABB switch-disconnector
Switch size	16 … 160	Size number. The UL ampere rating is printed separately (OT16F 20 A, OT25F 30 A, OT63F 60 A; p.9-55)
Operation and mounting	F / FT	F = base and DIN-rail mounting, front operated; FT = door mounting, front operated
Poles	3 / 4 / 6 / 8	Number of poles
Poles (OT160G)	03 / 04 / 30 / 40	3 or 4 poles, operating mechanism at the left (03, 04) or right (30, 40) end
Included accessories	N2 / P / K	N2 = fourth pole switching with the main contacts; P = pistol handle and shaft; K = direct mount handle (base mounting only)

UL standard by size: OT16, 25, 40, 63, 80 are UL 508; OT30, 60, 100 are UL 98 (p.9-55). OT160G is UL Listed at 100 A and UL Recognized at 125 A under UL 98 (p.9-43).

OT200 to OT2000 non-fusible (p.9-41)

Segment	Code	Meaning
Switch size	200 … 2000	Ampere rating, 200 to 2000 A
Operation and mounting	U	Front operated, base mounting, UL/CSA
Poles	03 / 04 / 12 / 22 / 30 / 40	3 or 4 poles; mechanism at the left end (03, 04), between the poles (12, 22) or at the right end (30, 40)
Construction	W / K / P	W = wide phase distance; K = direct mount handle; P = external handle and metal shaft included

OT Plus OT20 to OT100 non-fusible (p.9-40)

Segment	Code	Meaning
Switch size	20 … 100	Ampere rating, 20 to 100 A
Poles	3 / 4 / 6 / 8	Number of poles
Mounting and operation	B / D / M	B = base and DIN-rail, front operated; D = door mounting; M = DIN panel mounting
Terminals	S / Q	S = screw terminals; Q = Quick-Spring terminals
Fourth pole	N1 / N2	Fourth pole simultaneous, mounted on the left (N1) or right (N2)
Included accessories	(empty) / U	Empty = black padlockable knob handle included; U = without knob handle, locking ring included

UL standard: G1 and G2 types (20 to 100 A) are UL 60947-4-1, and G3 types (30, 60, 100 A) are UL 98 (p.9-38, p.9-60, p.9-61).

The OT Plus key on page 9-40 prints G2 as frame 1 and G2 as frame 2. The technical pages show the OT20G1 through OT50G1 as frame G1. The frame letter is left out of the key above.

OS fusible (p.9-5, p.9-6)

Segment	Code	Meaning
Brand	OS	ABB switch fuse / fusible switch
Switch size	30 … 1200	Ampere rating, 30 to 1200 A. The 30 A OS Mini adds generation letter F (OS30F…, p.9-5)
Fuse type	AJ / ACC / J / L	OS Mini: AJ = Class J, ACC = Class CC. 60 to 1200 A: J = Class J, L = Class L
Operation	(blank) / S	Front operation; S = side operation
Poles	03 / 04 / 12 / 22 / 30 / 40	3 or 4 poles; mechanism at the left end (03, 04), between the poles (12, 22) or at the right end (30, 40)
Neutral	N1 / N2 / N3 / F	N1, N2 = non-fused switched neutral left or right; N3 = detachable neutral link; F = fused switched neutral
Included handle	P / K	P = pistol handle and shaft; K = direct mount handle

All OS ratings, 30 to 1200 A, are UL 98 (p.9-4, p.9-7).

The OS key on page 9-6 states that sizes 60 through 1200 A are followed by a generation letter G. The 200 A and larger types are printed without it — the OS200J03 on page 9-9, for example. The generation letter is left out of the key above for 60 A and up.

Enclosed EOT and EOS (p.9-93)

Segment	Code	Meaning
Product	E	Enclosed switch
Switch type	OT / OS	OT = non-fused; OS = fused
UL listing	5 / 9	5 = UL 508; 9 = UL 98 (UL/cUL)
Ampere rating	20 … 800	20 = 20 A through 800 = 800 A
Fusing	N / C / J	N = non-fused; C = fused Class CC; J = fused Class J
Poles	3 / 4 / 6 / 8	Number of poles
Switch style	P / C	P = standard; C = changeover (changeover types are not in the table above)
Series	A / B / C	A, B or C series
Enclosure	1 / 3 / P / X	1 = Type 1 metallic (UL 98 only); 3 = Type 1/3R/12 metallic; P = Type 1/3R/12/4/4X plastic; X = Type 4/4X stainless
Handle	PB / PR / PX / SB / SR	Pistol black, red/yellow or stainless; selector black or red/yellow
Auxiliary contact	A / 1	A = none; 1 = 1 normally open (N.O.) and 1 normally closed (N.C.)

ABB prints the EOT560 enclosed UL 508 switch as 50 A on page 9-94, and as 60 A in the key on page 9-93 and in the technical data on page 9-95. The EOT560 is left out of the tables above.

One number, segment by segment

Segment	Value	Meaning	Catalog page
Brand	OT	ABB switch-disconnector	p.9-39
Switch size	16	Size 16: UL ampere rating 20 A, UL 508	p.9-39, p.9-55
Operation and mounting	F	Base and DIN-rail mounting, front operated	p.9-39
Poles	4	4 poles	p.9-39
Included accessories	N2	Fourth pole, switching together with the main contacts	p.9-39

OT16F4N2 is ABB order number 1SCA104829R1001 (p.9-55). Handle and shaft are not included.

Allen-Bradley 1494G, 1494H, 1494F and 1494U

Source: Rockwell technical data 1494-TD002F-EN-P (2026-03). Rockwell prints a catalog number explanation for 1494G (p.32) and 1494U (p.5), and notes that “not all combinations produce a valid catalog number.” 1494H and 1494F are listed by complete catalog number (p.47, p.26) without a key.

1494G enclosed safety disconnect switches (p.32)

Segment	Code	Meaning
Bulletin	1494G / 1494GY / 1494GX	Standard-size enclosure (30 to 600 A); large-size (30 to 200 A); extra large-size (30 to 100 A)
Switch rating	B / C / D / E / F / G	30 / 60 / 100 / 200 / 400 / 600 A
Enclosure	F / C / K	F = Type 3R/4/12 painted metal; C = Type 4/4X 304 stainless steel; K = Type 12 hazardous location (Class II Div. 2 Group F+G, Class III Div. 1 and 2)
Poles	2 / 3	2-pole 1-phase; 3-pole 3-phase
Fusing	N / H / J / R	Non-fusible; Class H, J or R fuse clips
Fuse voltage	(blank) / 2 / 6	Blank = non-fusible; 2 = 240 V AC / 250 V DC; 6 = 600 V AC / 600 V DC
Options	-98 / -203W / -412 / -413 / -414	For example: N.O. auxiliary; viewing window; painted metal handle; stainless-steel handle; protective fuse cover

The hazardous-location version is printed as one catalog number, 1494G-DH3N-203W, 100 A non-fusible (p.45).

1494U universal flange switches, factory-assembled kits (p.5)

Segment	Code	Meaning
Bulletin	1494U	Disconnect switch, rod or cable operated
Fusing	N / J / R	Non-fusible; Class J fuse; Class R fuse
Switch rating	30 … 600	30, 60, 100, 200, 400, 600 A
Options	CR, C3–C6, LA, LC, M, N, S, NO, NC, PC …	Threaded rod; cable length 3 to 6 ft; lugs; painted metal, non-metallic or stainless handle; auxiliary contacts; protective cover. Options are listed in alphabetical order.

The switch bodies are 1494U-D30 to 1494U-D400 and 1494V-DS600 (p.6). Fusing is added with a trailer fuse block kit (p.7).

The standards compliance row on page 3 is laid out in merged cells. It places UL 98 under the 1494H and 1494U, UL 508 under the 1494G hazardous location column, and no standard under the 1494G heavy industrial or the 1494F. Those two sit in the "Not confirmed in the catalog" rows.

One number, segment by segment

Segment	Value	Meaning	Page
Bulletin	1494G	Enclosed safety disconnect switch, standard-size enclosure	p.32
Switch rating	B	30 A	p.32
Enclosure	F	Type 3R/4/12 painted metal	p.32
Poles	3	3-pole, 3-phase	p.32
Fusing	J	Class J fuse clips	p.32
Fuse voltage	6	600 V AC / 600 V DC	p.32

1494G-BF3J6 is printed in the 600 V fusible table (p.34). Rockwell notes that replacing J with R or H gives Class R or Class H clips, for example 1494G-BF3R6.

Eaton R5 and R9

Source: Eaton Volume 5 Tab 8, Rotary Disconnects, CA08100006E (2026-07). Eaton prints a catalog numbering system on p.V5-T8-60.

Segments (p.V5-T8-60)

Segment	Code	Meaning
UL listing	R5 / R9 / R4	R5 = UL 508; R9 = UL 98; R4 = UL 489
Frame	A / B	UL 508, 16–40 A / 60–100 A
Frame	C / D / E / F / G	UL 98 non-fusible: 30–100 A / 100–200 A / 400 A / 600 A / 800–1200 A
Frame	H	UL 489 fusible, 30 A compact
Frame	J / K / L / M / N	UL 98 fusible: 30–60 A / 60–100 A / 200 A / 400 A / 600–800 A
Poles	2 / 3 / 4	Two-, three- or four-pole
Ampere rating	016 … 1200	016 = 16 A through 1200 = 1200 A
Protection	U / F	U = non-fusible; F = fusible
Fuse type accepted	CC / J / L	Class CC, J or L; blank on non-fusible devices

T5A and T5B are the toggle versions of the R5 switch (“Three-Pole Toggle Switch Only”, p.V5-T8-6). Eaton prints “Suitable as Motor Disconnect” for R5 from 16 to 80 A (p.V5-T8-10).

One number, segment by segment

Segment	Value	Meaning	Page
UL listing	R9	UL 98	p.V5-T8-60
Frame	K	UL 98 fusible, 60–100 A	p.V5-T8-60
Poles	3	Three-pole	p.V5-T8-60
Ampere rating	100	100 A	p.V5-T8-60
Protection	F	Fusible	p.V5-T8-60
Fuse type	J	Class J	p.V5-T8-60

R9K3100FJ is printed as a switch body (K-frame, Class J) on p.V5-T8-30. The handle and shaft are separate selections.

Schneider Electric Vario and TeSys VLS

Source: Square D Digest 179, Section 8, Operating Mechanisms and Disconnect Switches (2026-04). The Digest prints identification keys for Vario (Table 8.1, p.8-3) and TeSys VLS (Table 8.28, p.8-9). The 9422 and MD switches are listed by complete catalog number (p.8-33, p.8-8) without a key.

Mini-Vario and Vario (Table 8.1, p.8-3)

Segment	Code	Meaning
Model	V / K	V = Vario; K = operator
Operator or accessory	CD / CF / BD / BF / CCD / CCF / VE / VD / Z	Single-hole or four-hole red and yellow (CD, CF) or black and gray (BD, BF); with extension shaft (CCD, CCF); handle installed on the unit, red (VE) or black (VD); Z = accessory, power pole, neutral or ground
Switch type (UL/IEC A)	N12 / N20	Mini-Vario 10/12 A; 16/20 A
Switch type (UL/IEC A)	02 / 01 / 0 / 1 / 2	Vario 10/12, 16/20, 20/25, 20/32, 25/40 A
Switch type (UL/IEC A)	3 / 4 / 5 / 6	Vario 45/63, 63/80, 100/125, 115/175 A
Enclosure	GE / GU / G30, A30, W30	Mini-Vario IP55 non-metallic; Vario IP55 non-metallic; Type 1/12/4/4X metallic (Class 9421)

The first figure of each pair is the UL rating (Table 8.13, p.8-5). The Mini-Vario enclosed VCFN12GE and VCFN20GE are printed as “Non-UL Listed” (p.8-3) and are not in the table above.

TeSys VLS (Table 8.28, p.8-9)

Segment	Code	Meaning
Product	VLS	Disconnect switch
Poles	1P / 3P	1 pole; 3 poles
Current	016 … 125	016 = 16 A through 125 = 125 A (IEC figure; the UL general-use rating is printed in Table 8.30, p.8-10)
Mounting	D / R	D = door mounting; R = DIN rail mounting
Body size	1 / 2	1 = small size (16–63 A); 2 = large size (63–125 A), UL 98

For the small size, code 1 at 16 through 63 A, the Digest names the standard as UL 508 on page 8-2 and in the key on page 8-9, and as UL 60947-4-1 in the certification table on page 8-10. The standard is left off code 1 above, and the VLS size 1 sits in the "Not confirmed in the catalog" rows.

One number, segment by segment

Segment	Value	Meaning	Page
Product	VLS	Disconnect switch	p.8-9
Poles	3P	3 poles	p.8-9
Current	100	100 A; UL general use 100 A at 600 V AC	p.8-9, p.8-10
Mounting	R	DIN rail mounting	p.8-9
Body size	2	Large size, 63–125 A, cULus per UL 98 (File E487907)	p.8-9, p.8-10

VLS3P100R2 is printed in Table 8.30 (p.8-10), where the DIN rail versions come complete with a black handle.

Siemens VBII, CFS, CNFS and MCS

Source: Siemens Industrial Controls catalog Section 18, Safety and Disconnect Switches (2026-06). Siemens prints a numbering system for VBII safety switches (p.18/6), CFS (p.18/105) and CNFS (p.18/110).

VBII general-duty and heavy-duty safety switches (p.18/6)

Segment	Code	Meaning
Switch type	G / L / H	G = general duty; L = general duty, quick install; H = heavy duty (DT and DTG are double throw, not in the table above)
Fusing	F / NF	Fused; non-fused
Poles	2 / 3 / 4 / 6	Number of poles
Voltage	1 / 2 / 6	120 V or 120/240 V; 240 V; 600 V
Amperes	1 … 8	1 = 30 A, 2 = 60 A, 3 = 100 A, 4 = 200 A, 5 = 400 A, 6 = 600 A, 7 = 800 A, 8 = 1200 A
Neutral	(omit) / N	Less neutral; with neutral
Enclosure	(omit) / R / S / SS / X / J	Type 1 indoor; Type 3R outdoor; Type 4/4X stainless; Type 4/4X 316 stainless; Type 4/4X non-metallic; Type 12 industrial
Series	A / (omit)	A = all general duty, 400 A and 600 A heavy duty; omitted on other heavy duty

CFS fusible and CNFS non-fusible compact switches (p.18/105, p.18/110)

Segment	Code	Meaning
Type	CFS / CNFS	Compact fusible switch; compact non-fusible switch
Poles	3	3 poles
Max. voltage	6	600 V
Ampere rating	1 … 7	1 = 30 A, 2 = 60 A, 3 = 100 A, 4 = 200 A, 5 = 400 A, 6 = 600 A, 7 = 800 A
Fuse provisions (CFS)	C / J / JL / L	Class CC; Class J, right-hand mechanism; Class J, left-hand mechanism; Class L, right-hand mechanism
Maximum AIC rating (CFS)	5 / (omit)	Ampere interrupting capacity: 5 = 100 kiloamperes (kA); omitted = 200 kA, Class J fused
Version	N / N1	CFS: N = new size-reduced version, N1 = new 100 kA 60 A switch. CNFS: N = compact design

MCS switches carry an R or L suffix for a right- or left-handed mechanism drive and take a fuse kit or a no-fuse kit ordered separately (p.18/103).

One number, segment by segment

Segment	Value	Meaning	Page
Switch type	H	Heavy duty	p.18/6
Fusing	F	Fused	p.18/6
Poles	3	3 poles	p.18/6
Voltage	6	600 V	p.18/6
Amperes	4	200 A	p.18/6
Neutral	N	With neutral	p.18/6
Enclosure	R	Type 3R, outdoor	p.18/6

HF364NR is printed in the 600 V heavy-duty fusible table (p.18/15). As a 200 A heavy-duty switch it has no series letter.

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Last updated 2026-10-28.