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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.

    • RMSO32-21.5A RMSO32-21.5A
      Quick view

      sku: RMSO32-21.5A

      RMSO32-21.5A

      Benshaw RMSO32-21.5A thermal overload relay with adjustable range from 18 to 25 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
    • GE RT1J overload relay
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      GE Industrial

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      sku: RT1J

      RT1J

      GE Industrial RT1J thermal overload relay that is 3 phase, has 1 normally open (N.O.) and 1 normally closed (N.C.) base mounted auxiliary contacts, automatic or manual reset and is adjustable from 1...

      $0.00
    • WEG RW27-1D3-D125 overload relay WEG RW27-1D3-D125 front dimensions
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      WEG

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      sku: RW27-1D3-D125

      RW27-1D3-D125

      The RW27-1D3-D125 is a three phase overload relay that is adjustable from 8 to 12.5 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 RW67-2D3-U040 overload relay WEG RW67-2D3-U040 front dimensions
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      WEG

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      sku: RW67-2D3-U040

      RW67-2D3-U040

      The RW67-2D3-U040 is a three phase overload relay with adjustments from 25 to 40 AMPS. This thermal overload has phase loss protection which trips when a phase is lost thus protecting the motor from...

      MSRP: $94.00
      $60.60
      Add to Cart
    • WEG RW67-2D3-U050 overload relay WEG RW67-2D3-U050 front dimensions
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      WEG

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      sku: RW67-2D3-U050

      RW67-2D3-U050

      The RW67-2D3-U050 is a three phase overload relay with adjustments from 32 to 50 AMPS. This thermal overload has phase loss protection which trips when a phase is lost thus protecting the motor from...

      MSRP: $94.00
      $60.60
      Add to Cart
    • Benshaw SPO-22H-11A overload relay
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      Benshaw

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      sku: SPO-22H-11A

      SPO-22H-11A

      Benshaw SPO-22H-11A Bimetallic Class 20 3 pole overload with a range from 9 to 13 AMPS and mounts directly to the RSC-9, RSC-12, RSC-18 and RSC-22 contactor in any coil voltage.  This 3 phase thermal...

      MSRP: $48.00
      $34.19
      Add to Cart
    • Siemens 3RU1116-1KB0 thermal overload relay Siemens 3RU1116-1KB0 front dimensions
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      Siemens

      3RU1116-1KB0

      Siemens 3RU1116-1KB0 class 10 thermal overload relay for direct mounting on size S00 contactors (3RT1015, 3RT1016 and 3RT1017), is adjustable from 9A to 12A and has phase loss protection. The...

      $0.00
    • Siemens 3RU1136-4EB0 thermal overload relay
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      Siemens

      3RU1136-4EB0

      Siemens 3RU1136-4EB0 class 10 thermal overload relay for direct mounting on size S2 contactors (3RT1033, 3RT1034, 3RT1035 and 3RT1036), is adjustable from 22A to 32A and has phase loss protection...

      $0.00
    • Siemens 3RU2126-4CB0 thermal overload relay Siemens 3RU2126-4CB0 dimensions
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      Siemens

      3RU2126-4CB0

       The Siemens 3RU2126-4CB0 overload relay is adjustable from 17 to 22 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 3RU2126-4DB0 thermal overload relay Siemens 3RU2126-4DB0 dimensions
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      Siemens

      3RU2126-4DB0

       The Siemens 3RU2126-4DB0 overload relay is adjustable from 20 to 25 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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