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.

  • Eaton/Moeller ZB65-75 overload relay Eaton/Moeller ZB65-75 front dimensions

    ZB65-75

    Eaton/Moeller ZB65-75 thermal overload relay that is adjustable from 65 to 75 AMPS and mounts to any DILM65 3-pole contactor. This 3 phase overload relay comes with manual and automatic reset, phase...

    MSRP: $260.00
    $108.30
    Add to Cart
  • Siemens 3RU2126-1JB0 thermal overload relay Siemens 3RU2126-1JB0 dimensions

    3RU2126-1JB0

     The Siemens 3RU2126-1JB0 overload relay is adjustable from 7 to 10 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
  • Benshaw RMSO-95-30A overload Benshaw RMSO-95-30A front dimensions

    RMSO-95-30A

    Benshaw RMSO-95-30A thermal overload relay with adjustable trip from 24 to 36 AMPS - Mounts onto the new style BENSHAW RC contactors from 75 AMP (RC-75A) to 100 AMP (RC-100A) - Manual or Automatic...

    MSRP: $176.00
    $102.00
    Add to Cart
  • Benshaw RMSO-95-42A overload Benshaw RMSO-95-42A front dimensions

    RMSO-95-42A

    Benshaw RMSO-95-42A thermal overload relay with adjustable trip from 34 to 50 AMPS - Mounts onto the new style BENSHAW RC contactors from 75 AMP (RC-75A) to 100 AMP (RC-100A) - Manual or Automatic...

    MSRP: $176.00
    $102.00
    Add to Cart
  • RMSO32-7.5A RMSO32-7.5A

    RMSO32-7.5A

    Benshaw RMSO32-7.5A thermal overload relay with adjustable range from 6 to 9 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