The Siemens SENTRON 5SL6425-7CC is a 4-pole miniature circuit breaker with C-curve tripping characteristic, rated 25 A at 400 V AC. It breaks fault currents up to 6 kA per EN 60898 — the standard for residential and light commercial final circuits. The C-curve (5–10× In magnetic trip) handles moderate inrush from small motors, fluorescent ballasts, or transformer loads without nuisance tripping, while still clearing short circuits fast enough for basic cable protection.
Panel fit and mounting
Occupies 4 modular width units (72 mm) on a DIN rail. Depth is 76 mm; installation depth behind the panel face is 70 mm. IP20 with conductors connected. Supplementary devices (auxiliary switches, shunt trips, alarm contacts) can be snapped onto the right side without additional DIN-rail space — useful for remote status or emergency-off integration.
Electrical ratings and operating range
Rated operational voltage is 400 V AC, maximum 440 V AC in multi-phase operation. Frequency range 50/60 Hz. DC rating limited to 72 V maximum. Power loss per pole is 3.2 W at rated current. Ambient temperature range is -40 °C to 75 °C, covering outdoor enclosures in cold climates and warm machine cabinets. Overvoltage category III and pollution degree 2 suit fixed installations downstream of the main distribution board.
Physical and environmental specs
Dimensions: 76 mm deep, 72 mm wide (4 MW), 90 mm tall. Halogen-free and silicon-free construction — relevant for environments sensitive to outgassing (clean rooms, certain industrial processes). Sealable with a lead seal to prevent tampering after commissioning. Vibration resistance tested to 50 m/s² at 25–150 Hz per IEC 60068-2-6.