Siemens 5SY7416-7 — 4-pole C-curve MCB for panel builders
The Siemens 5SY7416-7 is a 4-pole miniature circuit breaker from the SENTRON series, with a C tripping characteristic and a rated breaking capacity of 15 kA per EN 60898-1 and 25 kA per IEC 60947-2. It's rated for 400 V AC (440 V multi- or single-phase) and 60 V DC (72 V max). The C curve means it handles moderate inrush currents — think motor starters or transformer banks — without nuisance tripping, while still clearing short-circuit faults fast enough to protect downstream wiring. This breaker occupies 4 modular width units (72 mm) on a DIN rail and mounts in any position. The quick-assembly system and combined top/bottom terminals simplify panel wiring. Depth is 76 mm; installation depth is 70 mm. It's IP20 with conductors connected, which is standard for enclosed distribution boards — not for wet areas. Rated for pollution degree 3 and overvoltage category III, it's suited for fixed installations in industrial control panels and mechanical engineering environments. Halogen-free and silicon-free construction matters if the panel sits in a clean room or near sensitive electronics — off-gassing from a fault won't corrode contacts.
Breaking capacity — what the dual rating means for your panel
15 kA under EN 60898-1; 25 kA under IEC 60947-2 at 400 V AC. Under UL 1077, listed at 5 kA. For DC circuits, it's rated 15 kA at 60 V (72 V max) per IEC 60947-2. That's a solid figure for DC bus protection in drives or battery-backed control circuits, but watch the voltage — DC arcs are harder to extinguish, and this breaker's voltage limit is lower than its AC capability.
Compliance and documentation
Certified to IEC / EN 60898-1 and IEC / EN 60947-2, plus UL 1077. Halogen-free and silicon-free. Sealable. Energy limitation class 3 means it limits let-through energy tightly — less stress on downstream components during a fault. That's a factor in selective coordination: a Class 3 MCB upstream of a Class 3 MCB can coordinate without cascading, provided the ratio of ratings is adequate.