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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 3RU1126-4CB0 thermal overload relay Siemens 3RU1126-4CB0 front dimensions
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      Siemens

      3RU1126-4CB0

      Siemens 3RU1126-4CB0 class 10 thermal overload relay for direct mounting on size S0 contactors (3RT1023, 3RT1024, 3RT1025 and 3RT1026), is adjustable from 17A to 22A and has phase loss protection...

      $0.00
    • Siemens 3RU1136-4AB0 thermal overload relay
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      Siemens

      3RU1136-4AB0

      Siemens 3RU1136-4AB0 class 10 thermal overload relay for direct mounting on size S2 contactors (3RT1033, 3RT1034, 3RT1035 and 3RT1036), is adjustable from 11A to 16A and has phase loss protection...

      $0.00
    • Siemens 3RU1136-4GB0 thermal overload relay
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      Siemens

      3RU1136-4GB0

      Siemens 3RU1136-4GB0 class 10 thermal overload relay for direct mounting on size S2 contactors (3RT1033, 3RT1034, 3RT1035 and 3RT1036), is adjustable from 36A to 45A and has phase loss protection...

      $0.00
    • Siemens 3RU1136-4HB0 thermal overload relay
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      Siemens

      3RU1136-4HB0

      Siemens 3RU Class 10 Thermal Overload Relay for mounting on size S2 contactors (3RT1033, 3RT1034, 3RT1035 and 3RT1036), adjustable from 40A-50A Click here for a PDF file on this Siemens 3RU11 thermal...

      $0.00
    • Siemens 3RU2126-1CB0 wiring diagram Siemens 3RU2126-1EB0 dimensions
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      Siemens

      3RU2126-1EB0

       The Siemens 3RU2126-1EB0 overload relay is adjustable from 2.8 to 4 AMPS, has a manual or automatic reset option and mounts to any 3RT2 size 0 contactor from 9 to 38 AMPS.  This UL rated thermal...

      MSRP: $86.00
      $55.46
      Add to Cart
    • Siemens 3RU2126-1GB0 thermal overload relay Siemens 3RU2126-1GB0 dimensions
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      Siemens

      3RU2126-1GB0

       The Siemens 3RU2126-1GB0 overload relay is adjustable from 4.5 to 6.3 AMPS, has a manual or automatic reset option and mounts to any 3RT2 size 0 contactor from 9 to 38 AMPS.  This UL rated thermal...

      MSRP: $86.00
      $55.46
      Add to Cart
    • Siemens 3RU2126-4FB0 thermal overload relay Siemens 3RU2126-4FB0 dimensions
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      Siemens

      3RU2126-4FB0

       The Siemens 3RU2126-4FB0 overload relay is adjustable from 34 to 40 AMPS, has a manual or automatic reset option and mounts to any 3RT2 size 0 contactor from 9 to 38 AMPS.  This UL rated thermal...

      MSRP: $86.00
      $55.46
      Add to Cart
    • Lovato RF382500 overload relay Lovato RF382500 dimensions
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      Lovato Electric

      |

      sku: RF382500

      RF382500

      Lovato Electric RF382500 overload relay adjustable from 20 to 25 AMPS and mounts to any BF25 or BF32 3-pole contactor. This overload relay has phase loss protection (single phase sensitivity), manual...

      MSRP: $68.10
      $46.90
      Add to Cart
    • RMSO32-19A RMSO32-19A
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      sku: RMSO32-19A

      RMSO32-19A

      Benshaw RMSO32-19A thermal overload relay with adjustable range from 16 to 22 AMPS - Mounts onto the new style BENSHAW RC contactors from 9 AMP (RC-9A) to 40 AMP (RC-40A) - Manual or Automatic reset...

      MSRP: $92.00
      $53.36
      Add to Cart
    • RMSO32-34A RMSO32-34A
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      sku: RMSO32-34A

      RMSO32-34A

      Benshaw RMSO32-34A thermal overload relay with adjustable range from 28 to 40 AMPS - Mounts onto the new style BENSHAW RC contactors from 9 AMP (RC-9A) to 40 AMP (RC-40A) - Manual or Automatic reset...

      MSRP: $92.00
      $53.36
      Add to Cart
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