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.

Quick view Details

Siemens

3RU1116-1DB0

MSRP:

Now: $0.00

Compare
Quick view Details

Siemens

3RU1116-1HB0

MSRP:

Now: $0.00

Compare
Quick view Details

Siemens

3RU1126-4BB0

MSRP:

Now: $0.00

Compare
Quick view Details

Siemens

3RU1146-4JB0

MSRP:

Now: $0.00

Compare
Quick view Details

Siemens

3RU1146-4KB0

MSRP:

Now: $0.00

Compare
Quick view Details

Lovato Electric
|
sku: RF380160

RF380160

MSRP: $59.51

Now: $41.61

Add to Cart
Compare
Quick view Details

sku: RMSO32-1.3A

RMSO32-1.3A

MSRP: $92.00

Now: $53.36

Add to Cart
Compare
Quick view Details

sku: RMSO32-2.1A

RMSO32-2.1A

MSRP: $92.00

Now: $53.36

Add to Cart
Compare
Quick view Details

WEG
|
sku: RW27-1D3-D012

RW27-1D3-D012

MSRP: $50.00

Now: $32.24

Add to Cart
Compare
Quick view Details

WEG
|
sku: RW27-1D3-U015

RW27-1D3-U015

MSRP: $50.00

Now: $32.24

Add to Cart
Compare
Quick view Details

Eaton, Cutler Hammer
|
sku: XT0B2P4CC1

XTOB2P4CC1

MSRP: $180.83

Now: $52.12

Add to Cart
Compare
Quick view Details

Eaton, Cutler Hammer
|
sku: XTOM006AC1

XTOM006AC1

MSRP: $96.00

Now: $44.78

Add to Cart
Compare

Quick view

Siemens

3RU1116-1DB0

Siemens 3RU1116-1DB0 class 10 thermal overload relay for direct mounting on size S00 contactors (3RT1015, 3RT1016 and 3RT1017), is adjustable from 2.2A to 3.2A and has phase loss protection. The manual or automatic reset feature on this Sirius...

MSRP:

Now: $0.00
Compare
Quick view

Siemens

3RU1116-1HB0

Siemens 3RU1116-1HB0 class 10 thermal overload relay for direct mounting on size S00 contactors (3RT1015, 3RT1016 and 3RT1017), is adjustable from 5.5A to 8A and has phase loss protection. The manual or automatic reset feature on this Sirius series...

MSRP:

Now: $0.00
Compare
Quick view

Siemens

3RU1126-4BB0

Siemens 3RU1126-4BB0 class 10 thermal overload relay for direct mounting on size S0 contactors (3RT1023, 3RT1024, 3RT1025 and 3RT1026), is adjustable from 14A to 20A and has phase loss protection. The manual or automatic reset feature on this...

MSRP:

Now: $0.00
Compare
Quick view

Siemens

3RU1146-4JB0

Siemens 3RU1146-4JB0 class 10 thermal overload relay for direct mounting on size S3 contactors (3RT1044, 3RT1045, and 3RT1046), is adjustable from 45A to 63A and has phase loss protection. The manual or automatic reset feature on this Sirius...

MSRP:

Now: $0.00
Compare
Quick view

Siemens

3RU1146-4KB0

Siemens 3RU1146-4KB0 class 10 thermal overload relay for direct mounting on size S3 contactors (3RT1044, 3RT1045, and 3RT1046), is adjustable from 57A to 75A and has phase loss protection. The manual or automatic reset feature on this Sirius...

MSRP:

Now: $0.00
Compare
Quick view

Lovato Electric
|
sku: RF380160

RF380160

Lovato Electric RF380160 overload relay adjustable from 1 to 1.6 AMPS and mounts to any BF09, BF12, BF18, BF25 or BF32 3-pole contactor. This overload relay has phase loss protection (single phase sensitivity), manual or automatic reset options and screw...

MSRP: $59.51

Now: $41.61
Add to Cart Compare
Quick view

sku: RMSO32-1.3A

RMSO32-1.3A

Benshaw RMSO32-1.3A thermal overload relay with adjustable range from 1 to 1.6 AMPS - Mounts onto the new style BENSHAW RC contactors from 9 AMP (RC-9A) to 40 AMP (RC-40A) - Manual or Automatic reset - Class 10 tripping and push to test trip...

MSRP: $92.00

Now: $53.36
Add to Cart Compare
Quick view

sku: RMSO32-2.1A

RMSO32-2.1A

Benshaw RMSO32-2.1A thermal overload relay with adjustable range from 1.6 to 2.5 AMPS - Mounts onto the new style BENSHAW RC contactors from 9 AMP (RC-9A) to 40 AMP (RC-40A) - Manual or Automatic reset - Class 10 tripping and push to test trip...

MSRP: $92.00

Now: $53.36
Add to Cart Compare
Quick view

WEG
|
sku: RW27-1D3-D012

RW27-1D3-D012

The RW27-1D3-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

Now: $32.24
Add to Cart Compare
Quick view

WEG
|
sku: RW27-1D3-U015

RW27-1D3-U015

The RW27-1D3-U015 is a three phase overload relay that is adjustable from 10 to 15 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

Now: $32.24
Add to Cart Compare
Quick view

Eaton, Cutler Hammer
|
sku: XT0B2P4CC1

XTOB2P4CC1

Eaton XT0B2P4CC1 thermal overload relay adjustable from 1.6 to 2.4 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: $180.83

Now: $52.12
Add to Cart Compare
Quick view

Eaton, Cutler Hammer
|
sku: XTOM006AC1

XTOM006AC1

EATON XTOM006AC1 thermal overload relay with an adjustable AMP range from 4 to 6 AMPS. For use with the 3 pole Eaton XTMC9A10 and XTMC9A01 miniature contactors. Each overload comes standard with an automatic or manual reset, push-to-test button and screw...

MSRP: $96.00

Now: $44.78
Add to Cart Compare

Compare Selected

Shop by Category

Shop by Brand

Shop by Brand

Common Applications

AEO-Friendly FAQs