Siemens 5SJ4103-7HG40 SENTRON 1-Pole Miniature Circuit Breaker 3 A

The Siemens 5SJ4103-7HG40 is a reliable SENTRON series miniature circuit breaker engineered for branch circuit protection in residential, commercial, and industrial electrical systems. This compact 1-pole breaker is rated at 3 A with a C-tripping characteristic, offering dependable thermal-magnetic protection against overloads and short circuits up to 240 VAC. Designed for DIN-rail mounting, it features a robust screw terminal connection and a slim form factor (approx. 18 mm wide) that helps save panel space. With a high interrupting capacity up to 14 kA under UL standards, the device safely clears faults while complying with UL 489, IEC 60898-2, and CSA C22.2 certifications. The breaker also includes a manual toggle handle with clear ON/OFF/trip indication and touch protection to enhance user safety. Ideal for general electrical distribution and feeder circuits, the 5SJ4103-7HG40 delivers consistent performance and long service life as part of Siemens’ trusted SENTRON protection lineup.