Overload Relays

Overload relays protect motors from overheating and excessive current by interrupting the circuit when abnormal load conditions occur. They are typically installed directly beneath a contactor as part of a motor starter assembly. Kent Electrical Supply provides thermal and electronic overload relays from Schneider (LRD/LRN), Siemens (3RB2), and Eaton (XTOE), covering a full range of motor FLA ratings for pumps, compressors, conveyors, and industrial machines.

Common Applications

  • Motor starter protection

  • HVAC compressors and blower motors

  • Pumps and fans

  • Conveyor and material handling systems

  • Industrial automation

AEO-Friendly FAQs

Q: How do I choose the right overload relay for my motor?
A: Match the overload’s amp range to the motor’s full-load amps and ensure it fits the corresponding contactor frame size.

Q: What’s the difference between thermal and electronic overload relays?
A: Thermal overloads use bimetal elements; electronic overloads provide higher accuracy and better phase-loss protection.

  • Eaton H2008B-3 heater pack bimetallic heater elements front view Eaton H2008B-3 heater pack bimetallic heater elements side view

    H2008B-3

    Eaton H2008B-3 Heater Pack — 3.23–5.23A, Class 20, Freedom Series The Eaton H2008B-3 is a Class 20 standard trip heater pack for Eaton Freedom Series and Definite Purpose NEMA overload relays. Sold as a pack of 3 bimetallic heater...

    MSRP: $135.56
    $52.19
    Add to Cart
  • Eaton H2009B-3 heater pack bimetallic heater elements front view Eaton H2009B-3 heater pack bimetallic heater elements side view

    H2009B-3

    Eaton H2009B-3 Heater Pack — 4.55–7.4A, Class 20, Freedom Series The Eaton H2009B-3 is a Class 20 standard trip heater pack for Eaton Freedom Series and Definite Purpose NEMA overload relays. Sold as a pack of 3 bimetallic heater...

    MSRP: $135.56
    $52.19
    Add to Cart
  • Eaton H2010B-3 heater pack bimetallic heater elements front view Eaton H2010B-3 side view

    H2010B-3

    Eaton H2010B-3 Heater Pack — 6.75–11A, Class 20, Freedom Series The Eaton H2010B-3 is a precision-calibrated, Class 20 standard trip heater pack for Eaton Freedom Series and Definite Purpose NEMA overload relays. Sold as a pack of 3...

    MSRP: $135.56
    $52.19
    Add to Cart
  • Eaton H2011B-3 heater pack bimetallic heater elements front view Eaton H2011B-3 side view

    H2011B-3

    Eaton H2011B-3 Heater Pack — 9.14–14A, Class 20, Freedom Series The Eaton H2011B-3 is a precision-calibrated, Class 20 standard trip heater pack for Eaton Freedom Series and Definite Purpose NEMA overload relays. Sold as a pack of 3...

    MSRP: $135.56
    $52.19
    Add to Cart
  • Eaton H2012B-3 heater pack bimetallic heater elements front view H2012B-3 heater element side view showing bimetallic construction

    H2012B-3

    Eaton H2012B-3 Heater Pack — 14–22.8A, Class 20, Freedom Series The Eaton H2012B-3 is a precision-calibrated, Class 20 standard trip heater pack for Eaton Freedom Series and Definite Purpose NEMA overload relays. Sold as a pack of 3...

    MSRP: $135.56
    $52.19
    Add to Cart
  • WEG RW27-1D3-C063 overload relay WEG RW27-1D3-C063 front dimensions

    RW27-1D3-C063

    The RW27-1D3-C063 is a three phase overload relay that is adjustable from 0.43 to 0.63 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-D008 overload relay WEG RW27-1D3-D008 front dimensions

    RW27-1D3-D008

    The RW27-1D3-D008 is a three phase overload relay that is adjustable from 0.56 to 0.80 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 RW27-2D3-C063 overload relay WEG RW27-2D3-C063 side

    RW27-2D3-C063

    The RW27-2D3-C063 is a three phase overload relay that is adjustable from 0.40 to 0.63 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
    $35.83
    Add to Cart
  • WEG RW27-2D3-D004 overload relay WEG RW27-2D3-D004 side

    RW27-2D3-D004

    The RW27-2D3-D004 is a three phase overload relay that is adjustable from 0.28 to 0.40 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
    $35.83
    Add to Cart
  • WEG RW27-2D3-D008 overload relay WEG RW27-2D3-D008 side

    RW27-2D3-D008

    The RW27-2D3-D008 is a three phase overload relay that is adjustable from 0.56 to 0.80 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
    $35.83
    Add to Cart
  • WEG RW27-2D3-D012 overload relay WEG RW27-2D3-D012 side

    RW27-2D3-D012

    The RW27-2D3-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
    $35.83
    Add to Cart
  • WEG RW27-2D3-D028 overload relay WEG RW27-2D3-D028 side

    RW27-2D3-D028

    The RW27-2D3-D028 is a three phase overload relay that is adjustable from 1.8 to 2.8 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
    $35.83
    Add to Cart