The Siemens SENTRON 5SL4214-8CC is a 2-pole miniature circuit breaker with a D tripping characteristic, rated at 0.3 A and 400 V AC.
The D tripping characteristic means this breaker tolerates short-duration current surges of 10 to 20 times the rated current before tripping magnetically.
At 36 mm wide — 2 modular width units — and 76 mm deep with a 70 mm installation depth, this breaker snaps onto standard DIN rail and fits enclosures sized for SENTRON 5SL series devices. Terminal capacity accepts 0.75 to 25 mm² conductors.