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.

  • GE RT2M overload relay

    RT2M

    GE Industrial RT2M thermal overload relay that is 3 phase, has 1 normally open (N.O.) and 1 normally closed (N.C.) base mounted auxiliary contacts, automatic or manual reset and is adjustable from 90 to 110 AMPS.  This GE overload relay has Class 10...

    $0.00
  • WEG RW27-1D3-D004 overload relay WEG RW27-1D3-D004 front dimensions

    RW27-1D3-D004

    The RW27-1D3-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
    $32.24
    Add to Cart
  • WEG RW27-2D3-D063 overload relay WEG RW27-2D3-D063 side

    RW27-2D3-D063

    The RW27-2D3-D063 is a three phase overload relay that is adjustable from 4 to 6.3 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
    $35.83
    Add to Cart
  • WEG RW27-2D3-D125 overload relay WEG RW27-2D3-D125 side

    RW27-2D3-D125

    The RW27-2D3-D125 is a three phase overload relay that is adjustable from 8 to 12.5 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
    $35.83
    Add to Cart
  • WEG RW27-2D3-U040 thermal overload relay front view, 25–40A Class 10 WEG RW27-2D3-U040 side

    RW27-2D3-U040

    WEG RW27-2D3-U040 Thermal Overload Relay — 25–40A, Class 10 The WEG RW27-2D3-U040 is a 3-pole bimetallic thermal overload relay with an adjustable current range of 25.0–40.0 Amps and Class 10 trip characteristics. It includes phase...

    MSRP: $60.00
    $41.78
    Add to Cart
  • SPO-150-56A SPO-150-56A

    SPO-150-56A

    Benshaw SPO-150-56A Bimetallic Class 10 3 pole overload with a range from 45 to 65 AMPS and mounts directly to the RSC-150 contactor in any coil voltage.  This 3 phase thermal overload relays come with an adjustable dial for easily setting the range...

    MSRP: $210.00
    $96.84
    Add to Cart
  • SPO-150-80A SPO-150-80A

    SPO-150-80A

    Benshaw SPO-150-80A Bimetallic Class 10 3 pole overload with a range from 65 to 100 AMPS and mounts directly to the RSC-150 contactor in any coil voltage.  This 3 phase thermal overload relays come with an adjustable dial for easily setting the...

    MSRP: $210.00
    $96.84
    Add to Cart
  • SPO-220H-200A

    SPO-220H-200A

    Benshaw SPO-220H-200A Bimetallic Class 20 3 pole overload with a range from 160 to 240 AMPS and mounts directly to the RSC-180 and RSC-220 contactors in any coil voltage.  This 3 phase thermal overload relay comes with an adjustable dial for easily...

    $155.45
    Add to Cart
  • Eaton XTOB001CC1 Overload Relay Eaton XTOB001CC1 Dimensions

    XTOB001CC1

    Eaton XT0B001CC1 thermal overload relay adjustable from 0.60 to 1 AMP 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 directly...

    MSRP: $180.83
    $52.12
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  • Eaton XTOB001CC1DP overload relay Eaton XTOB001CC1DP dimensions

    XTOB001CC1DP

    The Eaton XTOB001CC1DP thermal overload relay is adjustable from 0.60 to 1 AMP, has a manual or automatic reset and mounts to any 3 pole C25D definite purpose contactor from 15 to 40 AMPS.  Each overload relay provides phase loss sensitivity, comes...

    MSRP: $124.00
    $68.99
    Add to Cart
  • Eaton XTOB004CC1DP overload relay Eaton XTOB004CC1DP dimensions

    XTOB004CC1DP

    The Eaton XTOB004CC1DP thermal overload relay is adjustable from 2.4 to 4 AMPS, has a manual or automatic reset and mounts to any 3 pole C25D definite purpose contactor from 15 to 40 AMPS.  Each overload relay provides phase loss sensitivity, comes...

    MSRP: $124.00
    $68.99
    Add to Cart
  • Eaton XTOB175GC1 thermal overload relay Eaton XTOB175GC1 front dimensions

    XTOB175GC1

    Eaton XTOB175GC1 thermal overload relay adjustable from 145 to 175 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: $742.41
    $252.40
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