Eaton / Cutler-Hammer CSR2150N Molded Case Circuit Breaker

This 150A main breaker is designed for Eaton and Cutler-Hammer Type CH load centers, Type ECC unit enclosures, and Type ECB unit enclosures. It is also widely specified for use in solar and battery backup gateways, such as the Enphase IQ System Controller and Tesla Backup Gateway.

Yes. The CSR2150N is the direct replacement for the obsolete BWH2150, as both share a 25kAIC rating. It can also be used to upgrade a BW2150 installation, increasing the interrupting capacity from 10kAIC to 25kAIC for systems with higher available fault currents.

While it features a plug-in connection for the line side, the breaker is physically secured to the busbar using a bolt-on mechanism. This typically involves tightening two mounting nuts to ensure a stable, high-amperage connection for service entrance applications.

Many modern utility services and residential microgrid systems (like solar and battery backups) have an available fault current that exceeds 10,000 amps. The 25kAIC rating of the CSR2150N ensures it can safely interrupt these higher fault currents without sustaining damage, meeting strict local utility and NEC requirements.

No. This is a standard thermal-magnetic breaker equipped with fixed long-time and instantaneous (LI) trip functions for overload and short-circuit protection. It does not provide AFCI or GFCI protection.

The factory-installed lugs are rated for both aluminum and copper conductors ranging from 2 AWG to 300 kcmil. When terminating the service entrance cables, always use a calibrated torque wrench to meet the specific torque values printed on the breaker label.