Siemens 5SJ4204-7HG42 Molded Case Circuit Breaker

Siemens 5SJ4204-7HG42 is a SENTRON two-pole miniature circuit breaker rated for 4 A with a C-trip curve, designed for 480Y/277 V AC systems. This UL 489-listed device provides overcurrent protection with a breaking capacity of 10 kA, is RoHS compliant, and is manufactured in Germany. Weighing about 0.334 kg, its packaging dimensions are 40 × 125 × 84 mm. The 5SJ4204-7HG42 belongs to the 5SJ4 family of Siemens miniature circuit breakers and is specified for 2P operation with a 4 A nominal rating, making it suitable for general protection of two-conductor circuits in commercial and light-industrial installations that use 277/480 V supplies. In applications such as lighting, control circuits, and small motors within distribution panels or equipment fed from 480Y/277 V, this device provides reliable thermal-magnetic overcurrent protection while fitting into compact Siemens panel ecosystems.