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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.

    • Siemens 3RU1126-1CB0 thermal overload relay Siemens 3RU1126-1CB0 front dimensions
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      Siemens

      3RU1126-1CB0

      Siemens 3RU1126-1CB0 class 10 thermal overload relay for direct mounting on size S0 contactors (3RT1023, 3RT1024, 3RT1025 and 3RT1026), is adjustable from 1.8A to 2.5A and has phase loss protection. The manual or automatic reset feature on this...

      $0.00
    • Siemens 3RU1136-1HB0 thermal overload relay
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      Siemens

      3RU1136-1HB0

      Siemens 3RU1136-1HB0 class 10 thermal overload relay for direct mounting on size S2 contactors (3RT1033, 3RT1034, 3RT1035 and 3RT1036), is adjustable from 5.5A to 8A and has phase loss protection. The manual or automatic reset feature on this...

      $0.00
    • Siemens 3RU1136-1JB0 thermal overload relay
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      Siemens

      3RU1136-1JB0

      Siemens 3RU1136-1JB0 class 10 thermal overload relay for direct mounting on size S2 contactors (3RT1033, 3RT1034, 3RT1035 and 3RT1036), is adjustable from 7A to 10A and has phase loss protection. The manual or automatic reset feature on this...

      $0.00
    • Siemens 3RU1146-4DB0 thermal overload relay
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      Siemens

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      sku: 3RU1146-4DB0

      3RU1146-4DB0

      Siemens 3RU1146-4DB0 class 10 thermal overload relay for direct mounting on size S3 contactors (3RT1044, 3RT1045, and 3RT1046), is adjustable from 18A to 25A and has phase loss protection. The manual or automatic reset feature on this Sirius...

      $0.00
    • Siemens 3RU1146-4EB0 thermal overload relay
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      Siemens

      3RU1146-4EB0

      Siemens 3RU1146-4EB0 class 10 thermal overload relay for direct mounting on size S3 contactors (3RT1044, 3RT1045, and 3RT1046), is adjustable from 22A to 32A and has phase loss protection. The manual or automatic reset feature on this Sirius...

      $0.00
    • Siemens 3RU1146-4FB0 thermal overload relay
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      Siemens

      3RU1146-4FB0

      Siemens 3RU1146-4FB0 class 10 thermal overload relay for direct mounting on size S3 contactors (3RT1044, 3RT1045, and 3RT1046), is adjustable from 28A to 40A and has phase loss protection. The manual or automatic reset feature on this Sirius...

      $0.00
    • Siemens 3RU1146-4LB0 thermal overload relay
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      3RU1146-4LB0

      Siemens 3RU1146-4LB0 class 10 thermal overload relay for direct mounting on size S3 contactors (3RT1044, 3RT1045, and 3RT1046), is adjustable from 70A to 90A and has phase loss protection. The manual or automatic reset feature on this Sirius...

      $0.00
    • Siemens 3RU2116-0AB0 thermal overload relay Siemens 3RU2116-0AB0 dimensions
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      Siemens

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      sku: 3RU2116-0AB0

      3RU2116-0AB0

      Siemens 3RU2116-0AB0 3 pole IEC rated thermal overload relay that is adjustable from 0.11 to 0.16 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
    • Siemens 3RU2116-0BB0 thermal overload relay Siemens 3RU2116-0AB0 dimensions
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      Siemens

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      sku: 3RU2116-0BB0

      3RU2116-0BB0

      Siemens 3RU2116-0BB0 3 pole IEC rated thermal overload relay that is adjustable from 0.14 to 0.20 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 3RU2116-0CB0 thermal overload relay Siemens 3RU2116-0CB0 dimensions
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      Siemens

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      sku: 3RU2116-0CB0

      3RU2116-0CB0

      Siemens 3RU2116-0CB0 3 pole IEC rated thermal overload relay that is adjustable from 0.18 to 0.25 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 3RU2116-0DB0 thermal overload relay Siemens 3RU2116-0DB0 dimensions
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      Siemens

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      sku: 3RU2116-0DB0

      3RU2116-0DB0

      Siemens 3RU2116-0DB0 3 pole IEC rated thermal overload relay that is adjustable from 0.22 to 0.32 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 3RU2116-0EB0 thermal overload relay Siemens 3RU2116-0EB0 dimensions
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      Siemens

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      sku: 3RU2116-0EB0

      3RU2116-0EB0

      Siemens 3RU2116-0EB0 3 pole IEC rated thermal overload relay that is adjustable from 0.28 to 0.40 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
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