Siemens B12000S01N is a BL-type molded‑case circuit breaker (MCCB) with bolt‑on mounting for 120 V AC in a 1‑pole, 20 A configuration. It carries a 10 kA interrupt rating (10 KAIC) and uses a thermal‑magnetic trip to protect against both overloads and short circuits. This model can be equipped with a 120 V shunt‑trip accessory, enabling remote disconnection when signaled. Commonly used in Siemens BL‑frame panels and other compatible load centers, it protects branch circuits such as lighting and receptacles in commercial or light industrial installations.
