Siemens 5SY61 Miniature Circuit Breaker

Siemens 5SY61 10 A C‑curve miniature circuit breaker (MCB) is a single‑pole protection device designed for 230/400 V AC systems in industrial control panels. The C10 variant delivers a nominal current of 10 A with a C‑curve trip characteristic suitable for circuits with moderate inrush, such as sensors, PLC I/O, and small actuators. It is part of the SENTRON 5SY61 family, which includes other ratings from 1 A to 32 A and curves B, C, and D; examples include 5SY6110-7 for C10 and 5SY6106-6 for B6, all compatible with EN 60947-2 DIN rail installations. The breaker provides a short‑circuit breaking capacity of 6 kA at 230/400 V, and it is intended for use in 50/60 Hz systems, delivering reliable overcurrent protection in compact control panels.