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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 3RU2136-4HB0 thermal overload relay 3RU2136-4HB0 Side Dimensions
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      Siemens

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      sku: 3RU2136-4HB0

      3RU2136-4HB0

      Siemens 3RU2136-4HB0 thermal overload relay for mounting on Sirius 3RT203 size S2 contactors (3RT2035, 3RT2036, 3RT2037 and 3RT2038) and is adjustable from 40A-50A. This Class 10 overload (trips in...

      MSRP: $310.00
      $158.24
      Add to Cart
    • RMSO32-3.3A RMSO32-3.3A
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      sku: RMSO32-3.3A

      RMSO32-3.3A

      Benshaw RMSO32-3.3A thermal overload relay with adjustable range from 2.5 to 4 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
    • WEG RW117-1D3-U112 overload relay
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      WEG

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      sku: RW117-1D3-U112

      RW117-1D3-U112

      The RW117-1D3-U112 is a three phase overload relay with adjustments from 90 to 112 AMPS. This thermal overload has phase loss protection which trips when a phase is lost thus protecting the motor...

      MSRP: $192.00
      $123.76
      Add to Cart
    • WEG RW27-2D3-U023 overload relay WEG RW27-2D3-U023 side
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      WEG

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      sku: RW27-2D3-U023

      RW27-2D3-U023

      The RW27-2D3-U023 is a three phase overload relay that is adjustable from 15 to 23 AMPS. This thermal overload has phase loss protection which trips when a phase is lost thus protecting the motor...

      MSRP: $50.00
      $35.83
      Add to Cart
    • Eaton ZE-9 thermal overload Eaton ZE-9 front dimensions
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      Moeller Electric

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      sku: ZE-9

      ZE-9

      Eaton/Moeller ZE-9 thermal overload relay that is adjustable from 6 to 9 AMPS and mounts to any DILEM-10 or DILEM-01 3-pole contactor. This 3 phase overload relay comes with manual and automatic...

      MSRP: $72.00
      $47.63
      Add to Cart
    • Siemens 3RU2136-4GB0 thermal overload relay 3RU2136-4GB0 Side Dimensions
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      Siemens

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      sku: 3RU2136-4GB0

      3RU2136-4GB0

      Siemens 3RU2136-4GB0 Class 10 thermal overload relay for mounting on new Sirius 3RT203 size S2 contactors (3RT2035, 3RT2036, 3RT2037 and 3RT2038) and is adjustable from 36 to 45 AMPS.  This Siemens...

      MSRP: $241.00
      $116.14
      Add to Cart
    • Eaton C306GN3 overload base Eaton C306GN3 side label
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      sku: C306GN3

      C306GN3

      Eaton C306GN3 Overload Relay – NEMA-Rated Motor Protection The Eaton Cutler Hammer C306GN3 is a high-performance overload relay designed for reliable motor protection in industrial applications...

      MSRP: $540.36
      $247.45
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