Siemens Industry, Inc. B3100 molded-case circuit breaker is a 3-pole device rated for 100 amps at 240 VAC, designed to protect 3‑phase electrical circuits by interrupting fault currents. It is used in electrical distribution to safeguard conductors and equipment from overloads and short circuits in 240‑volt systems. The B3100 designation indicates its 3‑pole configuration and 100 A rating for applications requiring 240 VAC circuit protection.
