The Siemens SENTRON 5SY8620-7 is a 4-pole miniature circuit breaker rated 20 A with a C tripping characteristic, designed to protect branch circuits in industrial control panels. It breaks fault currents up to 30 kA at 400 V AC per IEC 60947-2 — enough to handle high-fault utility feeds without cascading upstream breakers. Neutral conductor switching is included (3P+N), so it clears all live conductors in a single fault event.
Occupies 4 modular width units (72 mm wide) with a depth of 76 mm (70 mm installation depth behind the panel). Mounts in any position — no derating for horizontal or vertical orientation. Terminal design allows combined top and bottom feed — useful for busbar looping or daisy-chaining downstream loads without extra junction blocks.
Current-production part. No end-of-life notification or successor identified.