The Siemens 5SY4214-7CC is a 2-pole SENTRON miniature circuit breaker rated 0.3 A with a C tripping characteristic, designed for 400 V AC systems. Breaking capacity is 10 kA per EN 60898, with a 5 kA rating under UL 1077 and CSA C22.2 No.235 — so it's certified for both IEC and North American panel builds. For most distribution boards fed from a transformer under 250 kVA, that's enough headroom.
At 36 mm wide (2 width units), it takes up two standard 18 mm module slots. Both top and bottom terminals are combined (phase and neutral bar compatible). The terminals are sealable and touch-protected.
Overvoltage category III, energy limiting class 3. The 5SY4CC design is the specific variant for this order code. Suitability is listed for mechanical engineering and industry applications — standard distribution and control panel duty.