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.

    • WEG RW27-1D3-D125 overload relay WEG RW27-1D3-D125 front dimensions
      Quick view

      WEG

      |

      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 from irreparable damage and costly repairs. Class 10...

      MSRP: $50.00
      $32.24
      Add to Cart
    • WEG RW27-2D3-U017 overload relay WEG RW27-2D3-U017 side
      Quick view

      WEG

      |

      sku: RW27-2D3-U017

      RW27-2D3-U017

      The RW27-2D3-U017 is a three phase overload relay that is adjustable from 11 to 17 AMPS. This thermal overload has phase loss protection which trips when a phase is lost thus protecting the motor from irreparable damage and costly repairs. Class 10...

      MSRP: $50.00
      $35.83
      Add to Cart
    • WEG RW27-2D3-U032 overload relay WEG RW27-2D3-U032 side
      Quick view

      WEG

      |

      sku: RW27-2D3-U032

      RW27-2D3-U032

      The RW27-2D3-U032 is a three phase overload relay that is adjustable from 22 to 32 AMPS. This thermal overload has phase loss protection which trips when a phase is lost thus protecting the motor from irreparable damage and costly repairs. Class 10...

      MSRP: $50.00
      $35.83
      Add to Cart
    • WEG RW67-2D3-U050 overload relay WEG RW67-2D3-U050 front dimensions
      Quick view

      WEG

      |

      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 irreparable damage and costly repairs. Class 10...

      MSRP: $94.00
      $60.60
      Add to Cart
    • SPO-150-107A SPO-150-107A
      Quick view

      Benshaw

      |

      sku: SPO-150-107A

      SPO-150-107A

      Benshaw SPO-150-107A Bimetallic Class 10 3 pole overload with a range from 85 to 125 AMPS and mounts directly to the RSC-150 contactor in any coil voltage.  This 3 phase thermal overload relays come with an adjustable dial for easily setting the...

      MSRP: $210.00
      $96.84
      Add to Cart
    • Siemens 3RU1116-1CB0 thermal overload relay Siemens 3RU1116-1CB0 front dimensions
      Quick view

      Siemens

      3RU1116-1CB0

      Siemens 3RU1116-1CB0 class 10 thermal overload relay for direct mounting on size S00 contactors (3RT1015, 3RT1016 and 3RT1017), is adjustable from 1.8A to 2.5A and has phase loss protection. The manual or automatic reset feature on this Sirius...

      MSRP: $70.00
      $56.32
      Add to Cart
    • Siemens 3RU1116-1JB0 thermal overload relay Siemens 3RU1116-1JB0 front dimensions
      Quick view

      Siemens

      3RU1116-1JB0

      Siemens 3RU1116-1JB0 class 10 thermal overload relay for direct mounting on size S00 contactors (3RT1015, 3RT1016 and 3RT1017), is adjustable from 7A to 10A and has phase loss protection. The manual or automatic reset feature on this Sirius series...

      $0.00
    • Siemens 3RU2116-1AB0 thermal overload relay Siemens 3RU2116-1AB0 dimensions
      Quick view

      Siemens

      |

      sku: 3RU2116-1AB0

      3RU2116-1AB0

      Siemens 3RU2116-1AB0 3 pole IEC rated thermal overload relay that is adjustable from 1.1 to 1.6 AMPS. This Class 10 overload relay trips in under 10 seconds or less in an over current situation and has screw terminals for easy installation and removal...

      MSRP: $72.00
      $51.63
      Add to Cart
    • Siemens 3RU2116-4AB0 thermal overload relay Siemens 3RU2116-4AB0 dimensions
      Quick view

      Siemens

      |

      sku: 3RU2116-4AB0

      3RU2116-4AB0

      Siemens 3RU2116-4AB0 3 pole IEC rated thermal overload relay that is adjustable from 11 to 16 AMPS. This Class 10 overload relay trips in under 10 seconds or less in an over current situation and has screw terminals for easy installation and removal...

      MSRP: $72.00
      $51.63
      Add to Cart
    • Eaton C306GN3 overload base Eaton C306GN3 side label
      Quick view

      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. Built to NEMA standards, this durable, compact relay...

      MSRP: $540.36
      $247.45
      Choose Options
    • Schneider LRD3353 thermal overload relay Schneider LRD3353 thermal overload relay side view
      Quick view

      Square D, Telemecanique

      |

      sku: LRD3353

      LRD3353

      Schneider Electric LRD3353 thermal overload relay adjustable from 23 to 32 AMPS and directly mounts to any LC1D40 through LC1D65 TeSys contactor. This 3-pole Schneider Electric overload relay has Class 10 protection, phase loss sensitivity and screw...

      MSRP: $107.00
      $93.11
      Add to Cart
    Compare Selected