Siemens 5SJ4140-6HG40 is a 1-pole miniature circuit breaker rated for 240 V AC with a 40 A nominal current and a 14 kA short-circuit breaking capacity. The B-type (B curve) device is UL 489 listed and designed for equal polarity operation, with a compact 70 mm mounting depth suitable for installation in low-voltage distribution panels and control circuits. This single-pole breaker provides reliable protection for individual branch circuits in electrical systems, enabling safe interruption of faults while preserving system integrity.
