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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.

    • Benshaw SPO-40-30A Overload Relay
      Quick view

      Benshaw

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      sku: SPO-40-30A

      SPO-40-30A

      Benshaw SPO-40-30A Bimetallic Class 10 3 pole overload with a range from 24 to 36 AMPS and mounts directly to the RSC-32 and RSC-40 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial for easily setting...

      $0.00
    • Benshaw SPO-40-34A Overload Relay
      Quick view

      Benshaw

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      sku: SPO-40-34A

      SPO-40-34A

      Benshaw SPO-40-34A Bimetallic Class 10 3 pole overload with a range from 28 to 40 AMPS and mounts directly to the RSC-32 and RSC-40 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial for easily setting...

      $0.00
    • Benshaw SPO-40-3A3 Overload Relay
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      Benshaw

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      sku: SPO-40-3A3

      SPO-40-3A3

      Benshaw SPO-40-3A3 Bimetallic Class 10 3 pole overload with a range from 2.5 to 4 AMPS and mounts directly to the RSC-32 and RSC-40 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial for easily setting...

      $0.00
    • Benshaw SPO-40-5A Overload Relay
      Quick view

      Benshaw

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      sku: SPO-40-5A

      SPO-40-5A

      Benshaw SPO-40-5A Bimetallic Class 10 3 pole overload with a range from 4 to 6 AMPS and mounts directly to the RSC-32 and RSC-40 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial for easily setting...

      MSRP: $55.00
      $33.08
      Add to Cart
    • Benshaw SPO-40-6A5 Overload Relay
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      Benshaw

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      sku: SPO-40-6A5

      SPO-40-6A5

      Benshaw SPO-40-6A5 Bimetallic Class 10 3 pole overload with a range from 5 to 8 AMPS and mounts directly to the RSC-32 and RSC-40 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial for easily setting...

      MSRP: $55.00
      $33.08
      Add to Cart
    • Benshaw SPO-40-7A5 Overload Relay
      Quick view

      Benshaw

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      sku: SPO-40-7A5

      SPO-40-7A5

      Benshaw SPO-40-7A5 Bimetallic Class 10 3 pole overload with a range from 6 to 9 AMPS and mounts directly to the RSC-32 and RSC-40 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial for easily setting...

      MSRP: $55.00
      $33.08
      Add to Cart
    • Benshaw SPO-40H-11A Overload Relay
      Quick view

      Benshaw

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      sku: SPO-40H-11A

      SPO-40H-11A

      Benshaw SPO-40H-11A Bimetallic Class 20 3 pole overload with a range from 9 to 13 AMPS and mounts directly to the RSC-32 and RSC-40 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial for easily setting...

      MSRP: $55.00
      $33.08
      Add to Cart
    • SPO-85-11A
      Quick view

      Benshaw

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      sku: SPO-85-11A

      SPO-85-11A

      Benshaw SPO-85-11A Bimetallic Class 10 3 pole overload with a range from 9 to 13 AMPS and mounts directly to the RSC-50, RSC-65, RSC-75 and RSC-85 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial for...

      $0.00
    • SPO-85-15A
      Quick view

      Benshaw

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      sku: SPO-85-15A

      SPO-85-15A

      Benshaw SPO-85-15A Bimetallic Class 10 3 pole overload with a range from 12 to 18 AMPS and mounts directly to the RSC-50, RSC-65, RSC-75 and RSC-85 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial...

      $0.00
    • SPO-85-19A
      Quick view

      Benshaw

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      sku: SPO-85-19A

      SPO-85-19A

      Benshaw SPO-85-19A Bimetallic Class 10 3 pole overload with a range from 16 to 22 AMPS and mounts directly to the RSC-50, RSC-65, RSC-75 and RSC-85 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial...

      $0.00
    • SPO-85-30A
      Quick view

      Benshaw

      |

      sku: SPO-85-30A

      SPO-85-30A

      Benshaw SPO-85-30A Bimetallic Class 10 3 pole overload with a range from 24 to 36 AMPS and mounts directly to the RSC-50, RSC-65, RSC-75 and RSC-85 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial...

      $0.00
    • SPO-85-34A
      Quick view

      Benshaw

      |

      sku: SPO-85-34A

      SPO-85-34A

      Benshaw SPO-85-34A Bimetallic Class 10 3 pole overload with a range from 28 to 40 AMPS and mounts directly to the RSC-50, RSC-65, RSC-75 and RSC-85 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial...

      $0.00
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