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371-BT GuardSwitch Explosion Proof

Safety Switch


The 371-BT is a defeat resistant switch ideal for environments where combustibles are being used such as in mining, grain elevators and painting booths. The enclosure is UL classified for: Class I, Group B,C,D; Class II, Group E,F,G; Class III, Divisions 1 & 2.  


  • Requiring Explosion-Proof Enclosure for Hazardous Locations

  • Meets AMSI, Semi S2 & European Safety Standard for the Highest Machine Risk Category 4 when used with the INT Safety Relay

  • UL Enclosure Classified for Use in Hazardous Locations:

    • Class I, Group B, C, D

    • Class II, Group E, F, G

    • Class III, Divisions 1 & 2

371-BT GuardSwitch Explosion Proof

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Catalog Numbers

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Catalog Number

DPST: 1 NO, 1 NC, Terminal Connection # 6 Screws
Black Anodized Aluminum
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Agency Approvals

UL Listed Enclosure (E88735)
cULus Recognized (E122942)
CSA Certified (LR89176)
NEMA Ratings:  1, 2, 5
Protection Class:  IP64


Enclosure:   UL Explosion Proof Black Anodized, Die Cast Aluminum

Temperature Range :  -40F to 180F (-40C to 80C)

Environmental:   Hermetically sealed contact switch encapsulated in polyurethane

Response time (individual circuits):   1 msec
  - The two circuits do not switch simultaneously and depend on the speed of the guard
  - A delay less than 50 msec is typical.

Life cycles:   100,000 under full load; up to 200,000,00 under dry circuit

Conduit Connection:   1/2 " Threaded NPT