Eaton / Cutler-Hammer BR2100 Miniature Circuit Breaker

Yes. Eaton Type BR breakers are UL classified as authorized replacements for legacy Bryant, Westinghouse, and Challenger load centers that accept 1-inch plug-on breakers.

No. Although it shares a 1-inch physical format, Type BR breakers are not UL listed for use in Square D, Siemens, or GE load centers. You must install the manufacturer-approved breaker for your specific panel brand to ensure compliance and safety.

Yes, the BR2100 is frequently used as a back-fed main breaker in 100A subpanels. However, the National Electrical Code (NEC) requires a physical hold-down kit, such as an Eaton BRPHD or BRHDK125 depending on the panel, to securely fasten the breaker to the bus bar.

The box lugs accept 4 AWG to 1/0 AWG copper or aluminum wire. Terminal torque is typically 45 lb-in for these larger conductors, but you should always verify and follow the exact torque ratings printed on the breaker label during installation.

Yes. If your electrical system requires a higher fault current rating, the Eaton BR2100H is the high-magnetic equivalent that offers an interrupting rating of 42 kAIC at 240V.

Yes. Like most modern Eaton Type BR thermal-magnetic breakers, this unit is HACR rated for use with multi-motor HVAC equipment that requires a dedicated 100A circuit.

No. This is a standard thermal-magnetic circuit breaker that provides only overload and short-circuit protection. It does not offer AFCI or GFCI functionality.

The box lugs are dual-rated for both Copper (Cu) and Aluminum (Al) conductors sized between 4 AWG and 1/0 AWG. When using aluminum wire, apply a listed anti-oxidant compound to the stripped conductors before tightening to prevent corrosion.