Meisterline Controls
Part number reference · Pilot devices

30 mm pilot devices and push buttons: series and part numbers

Meisterline Controls scopes and quotes UL 508A control panels. This page lines up 30 mm push buttons, illuminated push buttons, selector switches, emergency stops and pilot lights across five brands’ lines by operator type, then shows how each line’s part numbers are built, including whether contact blocks come fitted, with the catalog page for each.

Operator types side by side

A matching row is a starting point, not an equivalent. Contact blocks (fitted or ordered separately), lamp type and voltage, operator function (momentary, maintained or spring return) and the enclosure type rating all have to be checked before a part can be substituted. Send the list and we’ll check it against your ratings, as parts or as part of a panel quote.

Rows are operator types, named the way the catalogs’ own section headings name them. Each cell names the series and the leading characters of its catalog numbers for that type, with the catalog page. It is never a complete orderable number. Every series here mounts in the 30 mm hole (Eaton and Siemens print it as 30.5 mm). Because all of them share the hole size, there is no “nearest” column: the match is by operator type only. A series is named only where its own catalog states the UL listing.

Operator typeABBAllen-BradleyEatonSchneider Electric (Square D)Siemens
Push button, non-illuminated A3: A3PBF flush, A3PBE extended, A3PB4 / A3PB6 44 mm / 60 mm mushroom, A3PBM metal mushroom. pp.144–151 800T: 800T-A flush, 800T-B extended, 800T-D mushroom. 800H: 800H-AR, 800H-BR, 800H-DR, 800H-R booted. p.9 E30: E30AA single button, E30AB to E30AP two-button operators. Buttons are ordered separately. pp.189–190. 10250T: 10250T1… momentary pushbutton operators, for example 10250T101 flush, black. pp.209–213. E34: E34EB…, E34JB…, E34LB… momentary pushbutton operators and units. pp.282–283. HT800: HT8A…, for example HT8AAG flush, green, operator only. pp.320–321 9001 K / SK: 9001KR1 full guard, 9001KR2 extended guard, 9001KR3 no guard, 9001KR4 / 9001KR5 35 mm / 57 mm snap-in mushroom, 9001KR24 / 9001KR25 screw-on mushroom. SK: 9001SKR. Operator only. pp.51, 59 Class 52: 52PM chrome, 52BM Black Max. pp.192–193
Illuminated push button A3: A3PLE extended, A3PL4 / A3PL6 44 mm / 60 mm mushroom. pp.146–155 800T: 800T-P transformer, 800T-Q full voltage. 800H: 800H-PR, 800H-QR. A head type letter follows. p.10 E30: E30D single button with light, E30E two-button with light, E30J two-button with two lights. p.191. 10250T: 10250T3…, 10250T4…, 10250T7… illuminated pushbutton operators and units, for example 10250T397L. pp.209, 214, 216. E34: E34CB…, E34XB…. p.284. HT800: HT8GB…, HT8GD…. pp.320–325 9001 K / SK: 9001K1L, 9001K2L, 9001K3L illuminated momentary push buttons. SK: 9001SK1L, 9001SK2L. pp.53, 61 Class 52: 52PT / 52BT illuminated push button / push-to-test. pp.202–204
Push-pull and twist-to-release operators A3: A3PP push-pull, A3PT twist-to-release. pp.149–156 800T: 800T-FX push-pull, 800T-FXT push-pull / twist-to-release. 800H: 800H-FRXT. p.24 10250T: push-pull operators, for example 10250T10 three-position momentary, pp.219–226; twist-to-release 10250ED1043, p.213. E34: E34GDB…, E34GEB…, E34GFB…, E34GHB…. pp.286–289. HT800: HT8CB…, HT8FB…. pp.328–329. Not in the E30 line (operator tables pp.189–191) 9001 K / SK: 9001KR9 2-position, 9001KR8 3-position push-pull mushroom; illuminated 9001KR9P / 9001KR8P; 9001KR16 2-position turn-to-release trigger action. SK: 9001SKR9, 9001SKR8, 9001SKR16. pp.52, 60 Class 52: 52PP / 52BP push-pull, pp.194–197. 52PR / 52BR twist-to-release, p.198
Emergency stop (e-stop), as the catalog names it 1 Left empty: see the note below this row 800T: 800T-TFX, illuminated 800T-TFXT. 800H: 800H-TFRX, illuminated 800H-TFRXT. Trigger action, pp.7–8. Push-pull devices with N.C.L.B. contacts also meet EN ISO 13850 and IEC 60947-5-5 (p.24) 10250T: emergency stop operators and units (push-pull, mushroom, twist-to-release, jumbo lens), for example 10250ED1375 jumbo lens illuminated emergency stop. pp.209–221. E34: maintained push-pull EMERG. STOP units E34GDBC…, E34GDBJ…, E34GFBC…. p.286. HT800: HT8CBRAB-POP red push-pull emergency stop. p.320. Not in the E30 line Not named: the Section 19 operator tables don’t call a 9001 K / SK operator an emergency stop. The turn-to-release trigger action operators are in the push-pull row Class 52: 52BP, 52BR, 52PP, 52PR 2-position with red head and 52BJK contact blocks, with S added at the end of the number. Listed under its own cULus file, E524906. p.191, p.194
Selector switch, non-illuminated A3: A3SS short handle, A3SL long handle. pp.159–163 800T: 800T-H 2-position, 800T-J 3-position, 800T-N 4-position. 800H: 800H-HR, 800H-JR, 800H-NR. pp.13, 15, 17 10250T: selector switch operators, for example 10250T1311 two-position. pp.229, 234–235. E34: E34V…. pp.294, 298. HT800: HT8J…. pp.330–331. Not in the E30 line 9001 K / SK: 9001KS 2-, 3- and 4-position, for example 9001KS11, 9001KS43, 9001KS88. SK: 9001SKS. pp.54–56, 62–64 Class 52: 52SA / 52SB chrome short / long lever, 52SX / 52SW Black Max short / long lever. p.206
Illuminated selector switch A3: A3SS with a lamp code in the middle segment, for example A3SSAA-6L2G-00. p.164 800T / 800H: the power module code comes before the selector letter, for example 800T-16HR2KB6AX. pp.20–21 10250T: 10250T6… and 10250ED1117 illuminated selector switch units. pp.229, 236. Not in the E30 line 9001 K / SK: 9001K + position and cam digits + J + lamp code, for example 9001K11J1. SK: 9001SK11J1. pp.54–56, 62–64 Class 52: 52SA7 chrome / 52SX7 Black Max, short lever. p.205
Key-operated selector switch A3: A3SK. pp.165–166 800T only: cylinder lock codes in place of the knob code, for example 800T-H33A. 2-position p.14, 3-position p.16, 4-position p.18 Not in the E30 line (operator tables pp.189–191) No key-operated selector switch in our 9001 K / SK data Class 52: 52SC. p.208
Pilot light A3: A3L4 (LED). pp.157–158 800T: 800T-P / 800T-Q. 800H: 800H-PR / 800H-QR. No head type letter; T after it is push-to-test. p.22. Cluster pilot light 800T-PCL, p.30 E30: E30B single, E30C dual indicating light unit. Lenses are ordered separately. p.190. 10250T: 10250T1…, 10250T2… indicating lights, for example 10250T181L. pp.209, 215–216. E34: E34FB…, E34TB…, E34RB…. pp.282, 284. HT800: HT8GT… PresTest lights. pp.326–327 9001 K / SK: 9001KP standard, 9001KT push-to-test, 9001KTR remote test. SK: 9001SKP, 9001SKT, 9001SKTR. pp.58, 65 Class 52: 52PL / 52BL. pp.200–201
1
ABB’s 30 mm section has no emergency stop table. Its one emergency stop sentence (PDF page 176) sits in a Declaration of Conformity block that names catalog numbers 52P and 52S, which are not A3 numbers, so the ABB cell is left empty.
ABB's A3 technical page carries the series' UL listing line for file E2403, and beneath it a Declaration of Conformity block naming catalog numbers 52P and 52S. That block's wording matches the Siemens Class 52 technical page. The UL listing line sits under the A3 heading and is used here; the emergency stop sentence in the declaration block is not.

Sources (PDF page numbers): ABB 1SXU150189C0201, Pilot devices (2022-11), 30 mm heavy duty oil-tight range, pages 143–176; the UL listing is on page 176. Allen-Bradley: Rockwell 800-TD009L (2025-09), pages 1–39; the UL listing is on page 4. Eaton: Volume 7, CA08100008E (2022-12), E30 pages 187–192 (UL listing on page 187), 10250T pages 205–242, E34 pages 276–298 and HT800 pages 318–331 (each prints “UL 508” with UL file number E131568, on pages 205, 276 and 318). Schneider Electric: Square D Digest 179 Section 19 (2026-07), Class 9001 Type K and SK pages 51–65; “UL File E78403. CCN NKCR” is on page 4. Siemens: Industrial Controls catalog Section 10 (2026-02), Class 52 pages 191–209; the UL listing is on pages 191 and 228.

Meisterline Controls names a series only where the catalog states the UL listing: the word Listed, a UL file number with its category code (Square D 9001 K and SK: file E78403, category NKCR), or a UL file number with the standard (Eaton 10250T, E34 and HT800: UL 508, file E131568). Eaton’s M30 and C30 print a UL file number only (pages 160 and 178) and Siemens’ 3SU1 30 mm parts have no UL statement in Section 10, so they aren’t named here; they are covered through our Parts Check.

Contact blocks are the main difference between lines. On ABB A3, Allen-Bradley 800T and 800H and Siemens Class 52, the end of the catalog number says which contact blocks are fitted, and the same operator without that code comes with none: ABB’s -00 rows read “Operator only” (PDF page 159), Allen-Bradley’s blank contact code is “No contacts” (page 9), and Siemens says “for operator without contact blocks leave position e blank” (page 10/192). Each of these lines also sells contact blocks on their own: ABB A3XC (PDF page 169), Allen-Bradley in kit form for field installation (page 39). Eaton E30 is different: operators come without contact blocks, and “contact blocks must be ordered separately, up to four circuits maximum” (page V7-T1-187). Before substituting, count the contact blocks behind each operator, not just the operator.
A red mushroom head or a push-pull operator is not by itself an emergency stop device. Allen-Bradley’s are the trigger action 800T-TFX and 800H-TFRX devices, plus push-pull devices fitted with N.C.L.B. (normally closed late break) contacts (Rockwell pages 7, 8 and 24). Siemens’ Class 52 e-stops take an S at the end of the number and 52BJK contact blocks, under a separate UL file (page 10/191). Check that the substitute is the e-stop version, with the contacts its catalog names.

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 A3

Format: type-lamp and colour-contacts, for example A3PBF1-600B-10. Source: ABB 1SXU150189C0201, 30 mm heavy duty oil-tight range (PDF pages 143–176). ABB doesn’t print a numbering key. The meanings below are the table headings and columns each code appears in, with the page. Each reference “includes the satin chrome metal body and nut together with the holder” (PDF page 144).

Type (first segment)

Starts withTable headingPDF page
A3PBFNon-illuminated pushbuttons, flush144
A3PBENon-illuminated pushbuttons, extended145
A3PLEIlluminated pushbuttons, extended146
A3PB4 / A3PP4 / A3PT4Non-illuminated pushbuttons, 44 mm mushroom: momentary / maintained push-pull / maintained twist-release149
A3PB6 / A3PP6Non-illuminated pushbuttons, 60 mm mushroom151
A3L4Pilot lights, LED bulb157
A3SS / A3SLSelector switches, short handle / long handle159
A3SKKey-operated selector switches, non-illuminated165
A3XCContact blocks, sold on their own169

Lamp and colour (middle segment)

CodeMeaningPDF page
600… / 6AA…Non-illuminated: the voltage column reads “–”144, 159
6L2… / 6L4…Full voltage 24 V AC/DC / 120 V AC/DC146, 157, 164
6LU… / 6LB…24–240 V AC/DC / 6–8 V AC/DC (pilot lights)157
last letterPush buttons and pilot lights: B black, G green, L blue, R red, C clear, M amber, W white, 7 assorted colours144, 146, 157

Selector switches use their own letters: the white-handle switches on PDF page 159 end in B. The push-button colours above don’t carry over.

Contacts (last segment)

CodeContacts columnPDF page
-000 0: no contact blocks (“Operator only” on the selector table)144, 159
-101 N.O., 0 N.C.144
-010 N.O., 1 N.C.144
-911 N.O. + 1 N.C.144
-20 / -212 N.O., 0 N.C. / 2 N.O. + 1 N.C. (selector switches)159

Pilot light numbers have no contacts segment (PDF page 157).

One number, segment by segment

SegmentValueMeaningPDF page
TypeA3PBF1Non-illuminated pushbutton, flush, momentary144
Lamp and colour600BNon-illuminated, black144
Contacts101 N.O., 0 N.C.144

A3PBF1-600B-10 is ABB order code 1SQA009177R0001 (PDF page 144).

Allen-Bradley 800T and 800H

Format: 800 + protection rating + [C] - operator type + colour + contact blocks, for example 800T-A1A. Source: Rockwell technical data 800-TD009L (2025-09). Rockwell prints a lettered key (a, b, c …) above each device table.

Segments

SegmentMeaningPage
TMetal, Type 4/13p.9
HPlastic, Type 4/4X/13. 800H operator codes add R (AR, BR, DR …)p.9
C (after T or H)Guard on terminals; without C, no guards. Example: 800TC-XAp.9, p.39

Operator type

800T800HOperatorPage
A / B / DAR / BR / DRFlush / extended / mushroom head, momentaryp.9
—R / GRBooted head / bootless guarded headp.9
P / Q / SPR / QR / —Illuminated: transformer / full voltage / operator onlyp.10, p.22
H / J / NHR / JR / NRSelector switch, 2 / 3 / 4 positionsp.13, p.15, p.17
H31 … H48—2-position cylinder lock (key) selector, by key removal positionp.14
FX / FXT— / FRXTPush-pull / push-pull with twist-to-releasep.24
TFX / TFXTTFRX / TFRXTTrigger action emergency stop, non-illuminated / illuminatedp.7, p.8

Colour cap and lens

CodeMeaningPage
1 / 2 / 3 / 4 / 5 / 6 / 7 / 9Colour cap: green / black / orange / gray / white / red / blue / yellowp.9
A / B / C / G / R / W / YLens: amber / blue / clear / green / red / white / yellowp.10
16 / 26 / 46 / 56Transformer: 120 / 240 / 480 / 600 V ACp.10
12 / 24 / 48 / 10 / 20Full voltage, incandescent: 12 / 24 / 48 / 120 / 240 V AC/DCp.10
2Full voltage LED, 12…130 V AC/DCp.10

Contact blocks (last code)

CodeMeaningPage
(blank)No contactsp.9
A / B1 N.O. - 1 N.C. / 2 N.O. - 2 N.C.p.9
D1 / D21 N.O. / 1 N.C.p.9
D3 / D41 N.O.E.M. (early make) / 1 N.C.L.B. (late break)p.9
A2 / A42 N.O. / 2 N.C.p.9
…V / …F / …R / …YPenTUFF low voltage / Class I, Div. 2 explosion-protected / logic reed / stackable sealed switch versionsp.9

Operator-only numbers (800T-A00, 800H-AR00 and similar) “are supplied with no legend cap or contact blocks” (p.12). Illuminated operator-only versions come “without power module, lamp, lens cap, or contact blocks” (p.10).

One number, segment by segment

SegmentValueMeaningPage
Bulletin800Bulletin 800 push buttonp.9
Protection ratingTMetal, Type 4/13; no C, so no terminal guardsp.9
Operator typeAFlush head, momentaryp.9
Colour cap1Greenp.9
Contact blocksA1 N.O. - 1 N.C.p.9

800T-A1A is printed on page 9 as the flush head unit example.

Eaton E30

E30 is a square, multifunction operator for the 30.5 mm (1-13/64 in) hole. Eaton sells it as separate catalog numbers: “When Ordering a Complete E30 Control Unit Specify Catalog Number of … Operator, Button(s), Contact block(s), Accessories (if required)” (page V7-T1-189). Source: Eaton Volume 7, CA08100008E (2022-12), pages V7-T1-187 to 192. Eaton doesn’t print a numbering key; the meanings below are the table headings. The 10250T, E34 and HT800 numbers in the table above carry their own catalog pages; this section covers E30.

Operators

NumberTable headingPage
E30AASingle button operator, without buttonV7-T1-189
E30AB to E30APTwo button operators, without buttons; some with a long OFF release barV7-T1-189, 190
E30B… / E30C…Single / dual indicating light unit, without lensV7-T1-190
E30D… / E30E… / E30J…Single button with indicating light / two button with indicating light / two button with dual indicating lightsV7-T1-191
E30KA… / E30KB…Buttons: Type A for E30AA; Type B for E30AB through AE, AL and DA through DFV7-T1-192
E30KLA1 / E30KLA2Contact block 1NO / 1NCV7-T1-189

The last letters of a light unit pick the light element, and they differ between tables: 120 V full voltage is E30BM on page V7-T1-190 but E30DF on page V7-T1-191. Read them from the table for that operator.

One order, item by item

ItemNumberMeaningPage
OperatorE30ABTwo button operator, momentary / momentaryV7-T1-189
ButtonE30KB130Type B extended button, black, “START”V7-T1-189, 192
ButtonE30KB231Type B extended button, red, “STOP”V7-T1-189, 192
Contact blockE30KLA11NOV7-T1-189
Contact blockE30KLA21NCV7-T1-189

This is Eaton’s own ordering example (E30AB) on page V7-T1-189.

Schneider Electric 9001 Type K and SK

Format: 9001 + type (K or SK) + operator code + [colour or lamp code], for example 9001KP1. Source: Square D Digest 179, Section 19 (2026-07), Class 9001 Type K and SK ordering tables, PDF pages 51–65; the UL file and category (“UL File E78403. CCN NKCR”) are on page 4. The Digest doesn’t print an overall numbering key for these lines. The meanings below are the ordering-table rows each code appears in, with the page.

Type

CodeMeaningPage
9001KType K heavy-duty 30 mm, UL Types 4 and 13 (NEMA 4, 13)pp.51–58
9001SKType SK corrosion-resistant 30 mm, UL Types 4, 4X and 13 (NEMA 4, 4X, 13)pp.59–65

Operator code

CodeOrdering-table rowPage
R1 / R2 / R3Momentary push button operator: full guard / extended guard / no guard. Operator only (no contact blocks)p.51 (K), p.59 (SK)
R4 / R5Momentary push button operator, 1-3/8 in. (35 mm) / 2-1/4 in. (57 mm) snap-in plastic mushroomp.51, p.59
R24 / R25Momentary push button operator, screw-on plastic mushroom with set screw securityp.51, p.59
R9 / R8Push-pull mushroom operator, 2-position (maintained pull / maintained push) / 3-position (momentary pull / maintained neutral / momentary push)p.52, p.60
R162-position turn-to-release trigger action mushroom operator, red plastic headp.52, p.60
1L / 2L / 3LIlluminated momentary push button (the lamp code follows the L)p.53, p.61
SNon-illuminated selector switch operator (position and cam digits follow), for example KS11 2-position, KS43 3-position, KS88 4-positionpp.54–56, 62–64
… JIlluminated selector switch operator: position and cam digits, then J and the lamp code, for example K11J1pp.54–56, 62–64
P / T / TRPilot light: standard / push-to-test / remote test (AC only)p.58, p.65

Lamp code (pilot lights and illuminated operators)

CodeMeaningPage
1110–120 V 50–60 Hz transformerpp.53, 58
3524–28 Vac/Vdc full voltagepp.53, 58
7220–240 V 50–60 Hz transformerpp.53, 58

One number, segment by segment

SegmentValueMeaningPage
Class9001Class 9001 push buttons and pilot devicesp.58
TypeKType K heavy-duty 30 mm, UL Types 4 and 13p.58
OperatorPStandard pilot lightp.58
Lamp1110–120 V 50–60 Hz transformer; ordered without a colour capp.58

Siemens Class 52

Format: 52 + finish + type + style + colour + contact blocks, for example 52PM8A2A. Source: Siemens Industrial Controls catalog Section 10 (2026-02). Siemens prints a lettered key (a, b, c …) above each selection table.

Finish and type

CodeMeaningPage
P / B (after 52)Chrome, Command 52 / epoxy coated, Black Max10/192
MMomentary push button10/192
P (third character)Push-pull10/194
TIlluminated push button / push-to-test10/202
LIndicator light10/200
52S + A / B / X / WSelector switch: chrome short lever / chrome long lever / Black Max short lever / Black Max long lever10/206
52SCKeyed selector switch, chrome10/208

Style and colour (push buttons)

CodeMeaningPage
8A / 8BFlush / extended10/192
9ASmall metal mushroom head, 1-3/4 in (44.5 mm)10/192
9W / 9VPlastic mushroom head, small 1-3/4 in (44.5 mm) / large 2-1/2 in (63.5 mm)10/192
1 / 2 / 3 / 4 / 5 / 6 / 7 / 8Black / red / green / yellow / blue / gray / all colour caps / orange10/192
CChrome (metal head)10/192

Contact blocks (last position) and suffixes

CodeMeaningPage
(blank)Operator without contact blocks10/192
A / B / C / D1 NO + 1 NC / 2 NO + 2 NC / 3 NO + 3 NC / 4 NO + 4 NC10/192
E / H1 NC (LB, late break) / 1 NO (EM, early make)10/192
F / G / J / K2 NO / 2 NC / 1 NC / 1 NO10/192
HL (suffix)Hazardous Location Class I, Div 2 rated contacts, on codes A, B, F, G, J and K10/192
S (suffix)Emergency stop version (with red head and 52BJK contact blocks)10/191, 10/194

One number, segment by segment

PositionValueMeaningPage
Class52Class 52, 30.5 mm10/192
aPChrome, Command 5210/192
bMMomentary push button10/192
c8AFlush10/192
d2Red10/192
eA1 NO + 1 NC contact blocks10/192

52PM8A2A is printed on page 10/193 as the flush, red, 1 NO - 1 NC chrome unit.

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Last updated 2026-10-28.