Siemens JKL3B250U Molded Case Circuit Breaker

Siemens JKL3B250 molded-case circuit breaker is a three-pole protective device rated for 250 A and up to 600 V, designed for bolt-on mounting in distribution panels and control cabinets. It belongs to the JKL series and uses a thermal-magnetic trip unit to provide overload and short-circuit protection for three-phase circuits, interrupting fault currents to protect conductors and equipment. With a molded-case enclosure, it offers durable, reliable overcurrent protection suitable for three-phase feeders and equipment in commercial and light-industrial installations, aligning with standard protection schemes in the JKL family. Key specifications include 3-pole configuration (3P), 250 A rating, 600 V maximum, bolt-on mounting, and a thermal-magnetic trip mechanism.