Siemens B230M Molded Case Circuit Breaker 2 Pole

Siemens B230M molded-case circuit breaker is a Type BL, two-pole, 30 A bolt-on device designed for panelboard mounting in 120/240 VAC systems. It provides thermal-magnetic overcurrent protection with a 10,000 A interrupt rating (10 kAIC) at 240 VAC and trips when current exceeds its setting, disconnecting both poles simultaneously for safe multiwire circuits. This HACR-rated breaker is intended for indoor panelboards in residential and light-commercial installations, offering common-trip operation that ensures both poles open on a fault. The unit is specified for 60 Hz operation and a 40°C ambient environment, aligning with Siemens BL-series performance in typical office, home, and workshop panels. Rough dimensions are around 3 in long by 3 in wide by 2 in high, and it is designed for panelboard mounting with a bolt-on style that fits standard Siemens BL frames. The B230M complies with UL 489 and is listed for use in compatible Siemens panelboards, making it a straightforward replacement or upgrade for BL-series 30 A circuits.