Siemens B140HH N Single Pole Molded Case Circuit Breaker

Siemens B140HH N is a 1-pole molded‑case circuit breaker (MCCB) rated for 120 V AC with a 40 A continuous current rating and a 65 kA interrupt capacity. As a Type HBL device, it uses a thermal‑magnetic trip to protect a single branch circuit from overloads and short circuits, making it suitable for residential and light commercial panelboards and enclosures that accept HBL breakers. The compact, molded‑case design supports reliable protection for 120 VAC circuits such as lighting, outlets, or small‑appliance runs, while delivering fast magnetic response for short‑circuit events and calibrated thermal response for overloads. With its 1‑pole configuration, the B140HH N provides targeted protection for individual conductors or circuits, helping to limit fault currents and safeguard wiring and devices downstream. This Siemens MCCB is part of the B140HH family and is commonly used where a single 40 A breaker is required in 120 V distribution, offering a straightforward, durable protective solution in both new installations and service upgrades.