Best Smseace Thermal Circuit Breakers in 2026
Daisy
Last Updated: Jul 18, 2026
Daisy
Last Updated: Jul 18, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Z Pan | 9.90 | ✅ | ✅ | ✅ |
Tandem breakers offer two circuit protection while only requiring one space in a load center
For NON CTL (circuit limiting) QO load centers without bus bar slots-for use in load centers manufactured prior to 1968
Standard overload and short circuit protection in Cutler- Hammer, Westinghouse, Bryant, Challenger, or Sylvania load centers
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Seashell World | 9.90 | ✅ | ✅ | ✅ |
Thermal Magnetic Standard Breaker
Country Of Origin: China
Model Number: BR230
Item Package Dimension: 5.842" L x 10.16" W x 17.78" H
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Westinghouse Control | 5.10 | ✅ | ✅ | ✅ |
UL489 Certified: Meets National Electrical Code standards to serve as primary thermal overload and short circuit protection. Approved by Underwriters Laboratories for Branch Circuit protection in US and Canada. UL File: E517955
Standard Installation: Mini Circuit Breaker snaps on 35mm DIN Rails or may be directly mounted to control panels. Typically used in motor control circuits, HVAC / HVACR Equipment, input output module protection for programmable logical controllers (PLC) and distributed control systems (DCS), relays and instrumentation among other applications.
Specifications: 8 Amp 1 pole C Trip Curve MCB rated for 10kAIC 277V AC. Direct current rating is 60V DC. Westinghouse Model Number: WMBB1C08
Current Limiting: Westinghouse MCBs are designed to interrupt within the first half AC cycle compared to 1 to 2 AC cycles for conventional breakers
What’s Included: Single Pole Miniature Circuit Breaker only. DIN Rail and Installation Kit sold separately
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Westinghouse Control | 5.10 | ✅ | ✅ | ✅ |
UL489 Certified: Meets National Electrical Code standards to serve as primary thermal overload and short circuit protection. Approved by Underwriters Laboratories for Branch Circuit protection in US and Canada. UL File: E517946
Standard Installation: Mini Circuit Breaker snaps on 35mm DIN Rails or may be directly mounted to control panels. Typically used in motor control circuits, HVAC / HVACR Equipment, input output module protection for programmable logical controllers (PLC) and distributed control systems (DCS), relays and instrumentation among other applications.
Specifications: 5 Amp 1 pole C Trip Curve MCB rated for 10kAIC 277V AC. Direct current rating is 60V DC. Westinghouse Model Number: WMBB1C05
Current Limiting: Westinghouse MCBs are designed to interrupt within the first half AC cycle compared to 1 to 2 AC cycles for conventional breakers
What’s Included: Single Pole Miniature Circuit Breaker only. DIN Rail and Installation Kit sold separately
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Westinghouse Control | 5.10 | ✅ | ✅ | ✅ |
UL489 Certified: Meets National Electrical Code standards to serve as primary thermal overload and short circuit protection. Approved by Underwriters Laboratories for Branch Circuit protection in US and Canada. UL File: E517964
Standard Installation: Mini Circuit Breaker snaps on 35mm DIN Rails or may be directly mounted to control panels. Typically used in motor control circuits, HVAC / HVACR Equipment, input output module protection for programmable logical controllers (PLC) and distributed control systems (DCS), relays and instrumentation among other applications.
Specifications: 15 Amp 1 pole C Trip Curve MCB rated for 10kAIC 277V AC. Direct current rating is 60V DC. Westinghouse Model Number: WMBB1C15
Current Limiting: Westinghouse MCBs are designed to interrupt within the first half AC cycle compared to 1 to 2 AC cycles for conventional breakers
What’s Included: Single Pole Miniature Circuit Breaker only. DIN Rail and Installation Kit sold separately
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Westinghouse Control | 5.10 | ✅ | ✅ | ✅ |
UL489 Certified: Meets National Electrical Code standards to serve as primary thermal overload and short circuit protection. Approved by Underwriters Laboratories for Branch Circuit protection in US and Canada. UL File: E517928
Standard Installation: Mini Circuit Breaker snaps on 35mm DIN Rails or may be directly mounted to control panels. Typically used in branch circuit applications including motor control circuits, HVAC / HVACR Equipment, and various OEM equipment.
Specifications: 60 Amp 3 pole D Trip Curve MCB rated for 10kAIC 480Y/277V AC. Direct current rating is 125V DC. Westinghouse Model Number: WMBB3D60 - 1
Current Limiting: This Westinghouse circuit breaker is designed to interrupt within the first half AC cycle compared to 1 to 2 AC cycles for conventional breakers
What’s Included: Three Pole Miniature Circuit Breaker only. DIN Rail and Installation Kit sold separately
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Westinghouse Control | 5.10 | ✅ | ✅ | ✅ |
UL489 Certified: Meets National Electrical Code standards to serve as primary thermal overload and short circuit protection. Approved by Underwriters Laboratories for Branch Circuit protection in US and Canada. UL File: E517928
Standard Installation: Mini Circuit Breaker snaps on 35mm DIN Rails or may be directly mounted to control panels. Typically used in branch circuit applications including motor control circuits, HVAC / HVACR Equipment, and various OEM equipment.
Specifications: 40 Amp 2 pole C Trip Curve MCB rated for 10kAIC 480Y/277V AC. Direct current rating is 125V DC. Westinghouse Model Number: WMBB2C40 - 1
Current Limiting: This Westinghouse circuit breaker is designed to interrupt within the first half AC cycle compared to 1 to 2 AC cycles for conventional breakers
What’s Included: Two Pole Miniature Circuit Breaker only. DIN Rail and Installation Kit sold separately
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Westinghouse Control | 5.10 | ✅ | ✅ | ✅ |
UL489 Certified: Meets National Electrical Code standards to serve as primary thermal overload and short circuit protection. Approved by Underwriters Laboratories for Branch Circuit protection in US and Canada. UL File: E517970
Standard Installation: Mini Circuit Breaker snaps on 35mm DIN Rails or may be directly mounted to control panels. Typically used in motor control circuits, HVAC / HVACR Equipment, input output module protection for programmable logical controllers (PLC) and distributed control systems (DCS), relays and instrumentation among other applications.
Specifications: 20 Amp 1 pole C Trip Curve MCB rated for 10kAIC 277V AC. Direct current rating is 60V DC. Westinghouse Model Number: WMBB1C20
Current Limiting: Westinghouse MCBs are designed to interrupt within the first half AC cycle compared to 1 to 2 AC cycles for conventional breakers
What’s Included: Single Pole Miniature Circuit Breaker only. DIN Rail and Installation Kit sold separately
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Breakers & Controls Florida Inc | 9.04 | ❌ | ❌ | ❌ |
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Essential Electric Supply | 9.56 | ❌ | ❌ | ❌ |
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Westinghouse | 9 |
| Cutler & Hammer | 1 |
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We are dedicated to assisting our users in finding the right breakers Products based on their needs, saving them considerable time when choosing which thermal circuit breakers to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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