RCD-operated circuit breaker, 1P+N, C20, 10 kA
The Siemens SENTRON 5SU9604-1KK20 is a 1P+N RCD-operated circuit breaker — an RCBO — combining overcurrent and residual-current protection in a single 1-MWU (18 mm wide) package. Rated 20 A at 30 °C with a C-curve tripping characteristic, it breaks fault currents up to 10 kA per EN 60898 and IEC 60947-2. The 77 mm depth (70 mm installation depth) fits standard 125 mm tall enclosures.
Derating and ambient range
At 40 °C it derates to 18.8 A, at 45 °C to 18.2 A, at 50 °C to 17.4 A, and at 55 °C to 16.2 A.