Siemens SENTRON 5SL4104-7CC — 1-pole C-curve MCB, 4 A, 10 kA
The Siemens SENTRON 5SL4104-7CC is a 1-pole miniature circuit breaker with a C tripping characteristic, rated at 4 A and 400 V AC. Its 10 kA breaking capacity per EN 60898 means it safely interrupts short-circuit faults up to that level in residential and infrastructure final circuits — think lighting, socket outlets, or small appliance feeds where the prospective fault current stays under 10 kA.
What the ratings mean for fit
The C-curve (5–10× In) is the standard choice for moderate inrush loads — small motors, transformers, capacitive LED drivers — where a B-curve would nuisance-trip on startup but a D-curve isn't needed. At 4 A it covers a 900 W resistive load at 230 V or a small pump/ventilation fan. The 1-pole form factor (18 mm width, one modular unit) snaps onto a standard DIN rail; the 76 mm depth and 70 mm installation depth leave clearance for a standard distribution board enclosure. Rated for overvoltage category III and pollution degree 2, this MCB is at home in fixed-installation distribution boards where the upstream transformer and service entrance are within the same building. The IP20 rating (with connected conductors) is typical for enclosed panel use — no washdown or outdoor exposure.
Panel integration notes
Mounts in any position on a standard DIN rail. The 18 mm width occupies exactly one modular unit — useful when packing a dense distribution board. Sealable design (tamper-evident cover available) for installations that require lockout. Halogen-free and silicon-free construction matters if the panel is in a clean room or a corrosive environment where outgassing could contaminate contacts. Supplementary devices (auxiliary switches, shunt trips, alarm contacts) can be added on the right side — the product extension flag is set to Yes, so the accessory range for SENTRON 5SL series fits without modification.