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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 3RU1146-4JB0 thermal overload relay
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      Siemens

      3RU1146-4JB0

      Siemens 3RU1146-4JB0 class 10 thermal overload relay for direct mounting on size S3 contactors (3RT1044, 3RT1045, and 3RT1046), is adjustable from 45A to 63A and has phase loss protection. The...

      $0.00
    • Siemens 3RU1146-4KB0 thermal overload relay
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      Siemens

      3RU1146-4KB0

      Siemens 3RU1146-4KB0 class 10 thermal overload relay for direct mounting on size S3 contactors (3RT1044, 3RT1045, and 3RT1046), is adjustable from 57A to 75A and has phase loss protection. The...

      $0.00
    • RMSO32-1.3A RMSO32-1.3A
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      sku: RMSO32-1.3A

      RMSO32-1.3A

      Benshaw RMSO32-1.3A thermal overload relay with adjustable range from 1 to 1.6 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
    • RMSO32-2.1A RMSO32-2.1A
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      sku: RMSO32-2.1A

      RMSO32-2.1A

      Benshaw RMSO32-2.1A thermal overload relay with adjustable range from 1.6 to 2.5 AMPS - Mounts onto the new style BENSHAW RC contactors from 9 AMP (RC-9A) to 40 AMP (RC-40A) - Manual or Automatic...

      MSRP: $92.00
      $53.36
      Add to Cart
    • WEG RW27-1D3-D012 overload relay WEG RW27-1D3-D012 front dimensions
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      WEG

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      sku: RW27-1D3-D012

      RW27-1D3-D012

      The RW27-1D3-D012 is a three phase overload relay that is adjustable from 0.80 to 1.2 AMPS. This thermal overload has phase loss protection which trips when a phase is lost thus protecting the motor...

      MSRP: $50.00
      $32.24
      Add to Cart
    • WEG RW27-1D3-U015 overload relay WEG RW27-1D3-U015 front dimensions
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      WEG

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      sku: RW27-1D3-U015

      RW27-1D3-U015

      The RW27-1D3-U015 is a three phase overload relay that is adjustable from 10 to 15 AMPS. This thermal overload has phase loss protection which trips when a phase is lost thus protecting the motor...

      MSRP: $50.00
      $32.24
      Add to Cart
    • Lovato 11RF975 overload relay Lovato 11RF975 dimensions
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      Lovato Electric

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      sku: 11RF975

      11RF975

      Lovato Electric 11RF975 overload relay adjustable from 4.5 to 7.5 AMPS and mounts to any BG06, BG09 or BG12 miniature 3-pole contactors. This overload relay has phase loss protection (single phase...

      MSRP: $55.00
      $39.26
      Add to Cart
    • Siemens 3RU1116-1AB0 thermal overload relay Siemens 3RU1116-1AB0 front dimensions
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      Siemens

      3RU1116-1AB0

      Siemens 3RU1116-1AB0 class 10 thermal overload relay for direct mounting on size S00 contactors (3RT1015, 3RT1016 and 3RT1017), is adjustable from 1.1A to 1.6A and has phase loss protection. The...

      $0.00
    • Siemens 3RU1146-4HB0 thermal overload relay
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      Siemens

      3RU1146-4HB0

      Siemens 3RU1146-4HB0 class 10 thermal overload relay for direct mounting on size S3 contactors (3RT1044, 3RT1045, and 3RT1046), is adjustable from 36A to 50A and has phase loss protection. The...

      $0.00
    • Siemens 3RU2116-1HB0 thermal overload relay Siemens 3RU2116-1HB0 dimensions
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      Siemens

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      sku: 3RU2116-1HB0

      3RU2116-1HB0

      Siemens 3RU2116-1HB0 3 pole IEC rated thermal overload relay that is adjustable from 5.5 to 8 AMPS. This Class 10 overload relay trips in under 10 seconds or less in an over current situation and has...

      MSRP: $72.00
      $51.63
      Add to Cart
    • Siemens 3RU2126-1FB0 thermal overload relay Siemens 3RU2126-1FB0 dimensions
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      Siemens

      3RU2126-1FB0

       The Siemens 3RU2126-1FB0 overload relay is adjustable from 3.5 to 5 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
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