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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.

    • RMSO32-2.1A RMSO32-2.1A
      Quick view

      sku: RMSO32-2.1A

      RMSO32-2.1A

      Benshaw RMSO32-2.1A thermal overload relay with adjustable range from 1.6 to 2.5 AMPS - Mounts onto the new style BENSHAW RC contactors from 9 AMP (RC-9A) to 40 AMP (RC-40A) - Manual or Automatic reset - Class 10 tripping and push to test trip...

      MSRP: $92.00
      $53.36
      Add to Cart
    • WEG RW27-1D3-D012 overload relay WEG RW27-1D3-D012 front dimensions
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      WEG

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      sku: RW27-1D3-D012

      RW27-1D3-D012

      The RW27-1D3-D012 is a three phase overload relay that is adjustable from 0.80 to 1.2 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...

      MSRP: $50.00
      $32.24
      Add to Cart
    • WEG RW27-1D3-U015 overload relay WEG RW27-1D3-U015 front dimensions
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      WEG

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      sku: RW27-1D3-U015

      RW27-1D3-U015

      The RW27-1D3-U015 is a three phase overload relay that is adjustable from 10 to 15 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
    • Eaton XTOB2P4CC1 Overload Relay Eaton XTOB2P4CC1 Dimensions
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      Eaton, Cutler Hammer

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      sku: XT0B2P4CC1

      XTOB2P4CC1

      Eaton XT0B2P4CC1 thermal overload relay adjustable from 1.6 to 2.4 AMPS with 1 N.O and 1 N.C. auxiliaries, manual and automatic reset and phase loss protection. These thermal overloads offer Class 10 tripping (trips in 10 seconds or less) and are...

      MSRP: $180.83
      $52.12
      Add to Cart
    • Eaton ZE-4 thermal overload Eaton ZE-4 front dimensions
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      Moeller Electric

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      sku: ZE-4

      ZE-4

      Eaton/Moeller ZE-4 thermal overload relay that is adjustable from 2.4 to 4 AMPS and mounts to any DILEM-10 or DILEM-01 3-pole contactor. This 3 phase overload relay comes with manual and automatic reset, phase loss sensitivity and a set of normally open...

      MSRP: $72.00
      $47.63
      Add to Cart
    • Lovato 11RF975 overload relay Lovato 11RF975 dimensions
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      Lovato Electric

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      sku: 11RF975

      11RF975

      Lovato Electric 11RF975 overload relay adjustable from 4.5 to 7.5 AMPS and mounts to any BG06, BG09 or BG12 miniature 3-pole contactors. This overload relay has phase loss protection (single phase sensitivity), manual reset option and screw terminals for...

      MSRP: $55.00
      $39.26
      Add to Cart
    • Siemens 3RU1116-1AB0 thermal overload relay Siemens 3RU1116-1AB0 front dimensions
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      Siemens

      3RU1116-1AB0

      Siemens 3RU1116-1AB0 class 10 thermal overload relay for direct mounting on size S00 contactors (3RT1015, 3RT1016 and 3RT1017), is adjustable from 1.1A to 1.6A and has phase loss protection. The manual or automatic reset feature on this Sirius...

      $0.00
    • Siemens 3RU1146-4HB0 thermal overload relay
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      Siemens

      3RU1146-4HB0

      Siemens 3RU1146-4HB0 class 10 thermal overload relay for direct mounting on size S3 contactors (3RT1044, 3RT1045, and 3RT1046), is adjustable from 36A to 50A and has phase loss protection. The manual or automatic reset feature on this Sirius...

      $0.00
    • Siemens 3RU2116-1HB0 thermal overload relay Siemens 3RU2116-1HB0 dimensions
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      Siemens

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      sku: 3RU2116-1HB0

      3RU2116-1HB0

      Siemens 3RU2116-1HB0 3 pole IEC rated thermal overload relay that is adjustable from 5.5 to 8 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 3RU2126-1FB0 thermal overload relay Siemens 3RU2126-1FB0 dimensions
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      Siemens

      3RU2126-1FB0

       The Siemens 3RU2126-1FB0 overload relay is adjustable from 3.5 to 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 overload relay comes with phase loss...

      MSRP: $86.00
      $55.46
      Add to Cart
    • Siemens 3RU2126-4NB0 thermal overload relay Siemens 3RU2126-4NB0 dimensions
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      Siemens

      3RU2126-4NB0

       The Siemens 3RU2126-4NB0 overload relay is adjustable from 23 to 28 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 overload relay comes with phase loss...

      MSRP: $124.00
      $74.79
      Add to Cart
    • Siemens 3RU2126-4PB0 thermal overload relay Siemens 3RU2126-4PB0 dimensions
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      Siemens

      3RU2126-4PB0

       The Siemens 3RU2126-4PB0 overload relay is adjustable from 30 to 36 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 overload relay comes with phase loss...

      MSRP: $86.00
      $55.46
      Add to Cart
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