The Siemens SENTRON 5SY7304-7CC is a 3-pole miniature circuit breaker (MCB) with a C tripping characteristic, rated at 4 A at 50/60 Hz AC. It breaks up to 30 kA per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No.235, giving you two coordination paths depending on the standard your panel follows.
The 30 kA IEC rating covers high-fault-capacity installations; the 5 kA UL/CSA rating aligns with North American branch-circuit requirements, so the same part works on either side of the Atlantic. Thermal derating is published: 3.71 A at 40 °C, 3.55 A at 45 °C, 3.39 A at 50 °C, and 3.22 A at 55 °C. Snap-on mounting to DIN rail, 3 modular-width units (54 mm wide), any mounting position. Combined top and bottom terminals, touch-protected, sealable — suitable for lockout/tagout procedures.
Halogen-free and silicon-free construction. Ambient operating range -40 °C to 75 °C, with humidity limits: 95% RH up to 55 °C, derating to 35% RH at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.