The Siemens 5SL6425-8CC is a 4-pole miniature circuit breaker (MCB) with a D tripping characteristic, rated 25 A at 400 V AC and a 6 kA breaking capacity. Four poles let it switch all three phases plus neutral in a single DIN-rail footprint, which keeps the panel layout clean on three-phase distribution boards.
Panel integration and compliance
The 4-pole width is 72 mm (4 x 18 mm modules), so plan your enclosure fill factor accordingly — a 24-way distribution board loses six ways to this one breaker. Wire termination accepts up to 25 mm² conductor on the line and load sides; torque the terminals to the values stamped on the device face (typically 2.5–3.0 Nm). RoHS compliant since June 2013, and REACH candidate-list information is available from Siemens on request. Export controls are AL:N / ECCN:N, so no special licensing for cross-border shipment within normal trade lanes.