The Siemens 5SY4604-5 is a SENTRON miniature circuit breaker rated 4 A with a 4-pole (3P+N) configuration and tripping characteristic A. It breaks fault currents up to 10 kA per EN 60898 and 35 kA per IEC 60947-2, so it handles both domestic and industrial fault levels without cascading upstream. The 4 A rating at 35 °C derates to 3.81 A at 40 °C and 3.39 A at 60 °C — factor that into panel ambient when sizing for continuous load.
Occupies 4 modular width units (72 mm wide) with a 70 mm installation depth and 76 mm overall depth.