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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.

    • Lovato 11RF915 overload relay Lovato 11RF915 dimensions
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      Lovato Electric

      |

      sku: 11RF915

      11RF915

      Lovato Electric 11RF915 overload relay adjustable from 9 to 15 AMP and mounts to any BG06, BG09 or BG12 miniature 3-pole contactors. This overload relay has phase loss protection (single phase...

      MSRP: $59.51
      $44.27
      Add to Cart
    • Siemens 3RU1126-1DB0 thermal overload relay Siemens 3RU1126-1DB0 front dimensions
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      Siemens

      3RU1126-1DB0

      Siemens 3RU1126-1DB0 class 10 thermal overload relay for direct mounting on size S0 contactors (3RT1023, 3RT1024, 3RT1025 and 3RT1026), is adjustable from 2.2A to 3.2A and has phase loss protection...

      $0.00
    • Siemens 3RU1126-1FB0 thermal overload relay Siemens 3RU1126-1FB0 front dimensions
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      Siemens

      3RU1126-1FB0

      Siemens 3RU1126-1FB0 class 10 thermal overload relay for direct mounting on size S0 contactors (3RT1023, 3RT1024, 3RT1025 and 3RT1026), is adjustable from 3.5A to 5A and has phase loss protection...

      MSRP: $72.00
      $50.59
      Add to Cart
    • Siemens 3RU1126-1KB0 thermal overload relay Siemens 3RU1126-1KB0 front dimensions
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      Siemens

      3RU1126-1KB0

      Siemens 3RU1126-1KB0 class 10 thermal overload relay for direct mounting on size S0 contactors (3RT1023, 3RT1024, 3RT1025 and 3RT1026), is adjustable from 9A to 12.5A and has phase loss protection...

      $0.00
    • Siemens 3RU1136-1KB0 thermal overload relay
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      Siemens

      3RU1136-1KB0

      Siemens 3RU1136-1KB0 class 10 thermal overload relay for direct mounting on size S2 contactors (3RT1033, 3RT1034, 3RT1035 and 3RT1036), is adjustable from 9A to 12.5A and has phase loss protection...

      $0.00
    • Siemens 3RU1136-4BB0 thermal overload relay
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      Siemens

      3RU1136-4BB0

      Siemens 3RU1136-4BB0 class 10 thermal overload relay for direct mounting on size S2 contactors (3RT1033, 3RT1034, 3RT1035 and 3RT1036), is adjustable from 14A to 20A and has phase loss protection...

      $0.00
    • Siemens 3RU1136-4DB0 thermal overload relay
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      Siemens

      3RU1136-4DB0

      Siemens 3RU1136-4DB0 class 10 thermal overload relay for direct mounting on size S2 contactors (3RT1033, 3RT1034, 3RT1035 and 3RT1036), is adjustable from 18A to 25A and has phase loss protection...

      $0.00
    • Siemens 3RU1146-4MB0 thermal overload relay
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      Siemens

      3RU1146-4MB0

      Siemens 3RU1146-4MB0 class 10 thermal overload relay for direct mounting on size S3 contactors (3RT1044, 3RT1045, and 3RT1046), is adjustable from 80A to 100A and has phase loss protection. The...

      $0.00
    • Siemens 3RU2126-1DB0 thermal overload relay Siemens 3RU2126-1DB0 dimensions
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      Siemens

      3RU2126-1DB0

       The Siemens 3RU2126-1DB0 overload relay is adjustable from 2.2 to 3.2 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
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