The Siemens SENTRON 5SL6625-7YA is a 4-pole miniature circuit breaker (3P+N) from the 5SL series, rated at 25 A with a C tripping characteristic.
Four poles with switched neutral (3P+N) means the neutral pole opens and closes with the phases, isolating the circuit fully during maintenance. Tightening torque 2.5-3 N·m on the screw terminals — use a torque screwdriver; under-torquing creates hot spots at rated load. The terminals are not touch-protected (IP20 only with distribution board cover fitted), so the breaker must be enclosed in a panel or consumer unit.
Installation depth 70 mm, overall depth 76 mm — fits standard distribution boards with 80 mm or deeper enclosures. Any mounting position permitted, ambient -25 to +45 °C, storage -40 to +75 °C. Sealable, halogen-free, silicon-free construction suitable for clean-room or food-processing zones where outgassing must be controlled. Energy limiting class 3 means it restricts let-through energy to protect downstream equipment during a fault. Mechanical life 10,000 switching cycles — adequate for normal branch-circuit duty; for frequent switching applications consider a contactor instead.