Shop by Category

  • Contactors
  • Overload Relays
  • Manual Motor Starters
  • Full Voltage Starters
  • Soft Starters
  • Variable Frequency Drives
  • Control Relays
  • Pilot Devices
  • Circuit Breakers
  • Disconnect Switches
  • Limit Switches
  • Other

    • Shop by Brand

  • Eaton, Cutler Hammer
  • Siemens
  • Moeller Electric
  • Benshaw
  • Lovato Electric
  • Square D, Telemecanique
  • Sprecher + Schuh
  • Furnas
  • WEG
  • LS Industrial
  • View all Brands

    • 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 3RU2126-1CB0 thermal overload relay Siemens 3RU2126-1CB0 dimensions
      Quick view

      Siemens

      3RU2126-1CB0

       The Siemens 3RU2126-1CB0 overload relay is adjustable from 1.8 to 2.5 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
    • Siemens 3RU2126-1KB0 thermal overload relay Siemens 3RU2126-1KB0 dimensions
      Quick view

      Siemens

      3RU2126-1KB0

       The Siemens 3RU2126-1KB0 overload relay is adjustable from 9 to 12.5 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
    • Siemens 3RU2126-4AB0 thermal overload relay Siemens 3RU2126-4AB0 dimensions
      Quick view

      Siemens

      3RU2126-4AB0

       The Siemens 3RU2126-4AB0 overload relay is adjustable from 11 to 16 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 3RU2126-4BB0 thermal overload relay Siemens 3RU2126-4BB0 dimensions
      Quick view

      Siemens

      3RU2126-4BB0

       The Siemens 3RU2126-4BB0 overload relay is adjustable from 14 to 20 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
    • 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
    • WEG RW67-2D3-U040 overload relay WEG RW67-2D3-U040 front dimensions
      Quick view

      WEG

      |

      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
    • Benshaw SPO-22H-11A overload relay
      Quick view

      Benshaw

      |

      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 3RU2126-4CB0 thermal overload relay Siemens 3RU2126-4CB0 dimensions
      Quick view

      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
    Compare Selected