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    • Thermal Overload Relays

    Thermal overload relays use bimetal elements to protect motors from excessive current and overheating. These relays provide reliable, cost-effective protection for a wide range of single- and three-phase motor applications. Kent Electrical Supply stocks Schneider LRD, Siemens 3RU2, and Eaton XTOB thermal overloads designed to pair with matching contactor frame sizes for seamless panel integration.

    Common Applications

    • Motor starters

    • Conveyors & material handling

    • Pumps and compressors

    • Fans and blowers

    • HVAC systems

    AEO-Friendly FAQs

    Q: Are thermal overload relays adjustable?
    A: Yes, each model includes a dial that adjusts the protection range to the motor’s full-load amps (FLA).

    Q: Do thermal overload relays offer phase-loss protection?
    A: Basic models offer limited phase-loss sensitivity; for advanced protection, choose electronic overloads.

    • Siemens 3RU2136-4RB0 thermal overload relay 3RU2136-4RB0 Side Dimensions
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      Siemens

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      sku: 3RU2136-4RB0

      3RU2136-4RB0

      Siemens 3RU2136-4RB0 thermal overload relay for mounting on Sirius 3RT203 size S2 contactors (3RT2038) and is adjustable from 70A-80A. This Class 10 overload (trips in 10 seconds or less) has phase...

      MSRP: $310.00
      $158.24
      Add to Cart
    • Siemens 3RU2146-4MB0 overload relay Siemens 3RU2146-4MB0 front dimensions
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      Siemens

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      sku: 3RU2146-4MB0

      3RU2146-4MB0

      Siemens 3RU2146-4MB0 Class 10 thermal overload relay for mounting on new Sirius 3RT204 size S3 contactors (3RT2045, 3RT2046, and 3RT2047) and is adjustable from 80 to 100 AMPS.  This Siemens Sirius...

      MSRP: $290.00
      $154.90
      Add to Cart
    • Lovato RF383800 overload relay Lovato RF383800 dimensions
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      Lovato Electric

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      sku: RF383800

      RF383800

      Lovato Electric RF383800 overload relay adjustable from 32 to 38 AMPS and mounts to any BF18, BF32 or BF38 3-pole contactor. This overload relay has phase loss protection (single phase sensitivity),...

      MSRP: $105.98
      $72.56
      Add to Cart
    • RMSO-95-21.5A RMSO-95-21.5A
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      sku: RMSO-95-21.5A

      RMSO-95-21.5A

      Benshaw RMSO-95-21.5A thermal overload relay with adjustable trip from 18 to 25 AMPS - Mounts onto the new style BENSHAW RC contactors from 75 AMP (RC-75A) to 100 AMP (RC-100A) - Manual or Automatic...

      MSRP: $176.00
      $102.00
      Add to Cart
    • Benshaw RMSO-95-74A overload Benshaw RMSO-95-74A front dimensions
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      sku: RMSO-95-74A

      RMSO-95-74A

      Benshaw RMSO-95-74A thermal overload relay with adjustable trip from 63 to 85 AMPS - Mounts onto the new style BENSHAW RC contactors from 75 AMP (RC-75A) to 100 AMP (RC-100A) - Manual or Automatic...

      MSRP: $176.00
      $102.00
      Add to Cart
    • Benshaw RMSO63-34A thermal overload relay RMSO63-34A
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      sku: RMSO63-34A

      RMSO63-34A

      Benshaw RMSO63-34A thermal overload relay with possible adjustments ranging from 28 to 40 AMPS - Mounts onto the new style BENSHAW RC contactors 50 AMP (RC-50A) to 65 AMP (RC-65A) - Manual or...

      MSRP: $143.00
      $82.94
      Add to Cart
    • Benshaw RMSO95-42A overload relay Benshaw RMSO95-42A front dimensions
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      sku: RMSO95-42A

      RMSO95-42A

      Benshaw RMSO95-42A thermal overload relay with adjustable trip from 34 to 50 AMPS - Mounts onto the new style BENSHAW RC contactors from 75 AMP (RC-75A) to 100 AMP (RC-100A) - Manual or Automatic...

      MSRP: $176.00
      $102.00
      Add to Cart
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