Eaton BRH340 BR Thermal Magnetic Circuit Breaker - UL 490
Part Number: BRH340
Quick Summary
The Eaton BRH340 thermal magnetic circuit breaker safeguards electrical panels by interrupting fault currents in residential, commercial, and industrial applications. Engineers often contend with nuisance trips or mis-sizing when upgrading load centers, blower controls, or motor starters, which causes downtime and costly warranty callbacks. UL 490 certification and Federal Specifications W-C376 compliance help ensure reliability, safety, and regulatory alignment across projects while supporting field replacements and maintenance scheduling. In practice, this model’s 3-pole design with common trip, 240 V operation, and 22 kAIC interrupt rating delivers predictable protection for Type BR load centers and industrial panels, simplifying procurement and installation.
Product Information
Extended Description
BRH340 Eaton: Eaton BR thermal magnetic circuit breaker,Type BR 1-Inch plug-on circuit breaker,40 A,22 kAIC,Three-pole,240V,BRH,Common breaker trip,#14-4 AWG Cu/Al,BRH,Type BR Loadcenters
Product Name
Eaton BR thermal magnetic circuit breaker
Catalog Number
BRH340
UPC
786676372657
Product Length/Depth
3 in
Product Height
3 in
Product Width
3 in
Product Weight
2 lb
Compliances
Federal Specifications Classification W-C376
Certifications
UL 490
Catalog Notes
10-150A. single-, two- and three-pole, selected amperageavailable in switching duty, HACR, shunt trip and high magnetic setting
Used with
Type BR Loadcenters
Type
Type BR 1-Inch plug-on circuit breaker
Voltage rating
240 V - 240 V
Trip Type
Common breaker trip
Circuit breaker type
BR
Interrupt rating
22 kAIC
Main circuit breaker
BRH
Wire size
#14-4 AWG Cu/Al
Number of poles
Three-pole
Residential and Light Commercial, Load centers and Circuit Breakers, Volume 1 Tab 1
Eaton Specification Sheet - BRH340
Eaton type BR circuit breaker limited warranty June 2024
Three-pole 40 A BRH340 with 22 kAIC interrupt rating provides robust fault protection across all three poles, reducing arc energy and preventing downstream equipment damage. This feature translates to shorter downtime, safer maintenance windows, and more predictable panel performance in harsh industrial environments. The common trip mechanism ensures all poles trip together, improving coordination and minimizing the risk of single-pole failures affecting system integrity, which is critical in distribution panels and motor control centers. The 1-Inch plug-on BR design supports rapid field replacement with minimal rewiring, speeding panel upgrades and reducing labor costs for retrofit projects. Compatibility with Type BR Loadcenters and standard wiring ( #14-4 AWG Cu/Al ) simplifies procurement and stock management. UL 490 and W-C376 compliance provide regulatory confidence for audits and contractor specifications, while the catalog notes reveal versatility across switching duty, HACR, shunt trip, and high magnetic settings. Space-efficient 3 x 3 x 3 inch form factor and a 2 lb weight enable easier handling and reduced enclosure crowding in compact panels. This combination of attributes supports scalable protection strategies for growing facilities and mixed-use spaces where reliability cannot be compromised.
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FAQs
The BRH340 is a Type BR 1-Inch plug-on circuit breaker designed to fit standard BR load centers. It accommodates #14-4 AWG Cu/Al conductors and provides a three-pole, common-trip protection with a 240 V rating. Its plug-on design enables straightforward substitution in existing panels, reducing downtime during upgrades and simplifying contractor fieldwork.
BRH340 is a 3-pole breaker rated at 40 A, with a 240 V voltage rating and a 22 kAIC interrupt capacity. It is built for common-trip operation across all poles and is intended for Type BR Loadcenters. This combination supports coordinated protection for branch circuits and motor loads while meeting relevant safety standards.
Yes. The catalog notes indicate the BRH340 supports a range of configurations, including HACR, switching duty, shunt trip, and high magnetic settings at selectable amperages from 10 to 150 A. This flexibility allows engineers to tailor protection schemes to motor, lighting, and HVAC applications within Type BR panels.
BRH340 carries UL 490 certification and complies with Federal Specifications W-C376. These standards verify safe operation, reliability, and regulatory compliance, which simplifies procurement, reduces audit risk, and ensures compatibility with industry practices in commercial and industrial installations.
Choosing BRH340 delivers predictable protection, minimizes nuisance trips, and supports rapid replacement, reducing maintenance downtime. Its common-trip design and UL/W-C376 compliance streamline approvals and commissioning. The result is lower total cost of ownership through fewer field-service visits, standardized components across BR load centers, and improved system uptime for critical facilities.