The Siemens 5SU9346-7CN63 is a 1P+N RCBO combining overcurrent and residual-current protection in a single DIN-rail module. Rated Icn 6 kA, it clears a bolted fault up to that level without upstream fuse backup in a 230 V AC installation. The Type A residual-current element detects pulsating DC fault currents — the kind rectifier-fed loads like washing machines, LED drivers, or VFDs can generate — as well as sinusoidal AC. With a 30 mA trip threshold it meets the person-protection requirement for socket-outlet circuits in most residential and commercial codes. The C characteristic (63 A In) handles inrush from motor-starting or capacitive loads without nuisance tripping, while still protecting the final circuit against sustained overload.
Lifecycle stage is current. That means Siemens still manufactures this order code; no phase-out notice or last-time-buy date has been issued. For a BOM line that calls out the 5SU9346-7CN63, the part remains a standard catalog item — no need to requalify a substitute unless the panel design changes.
Snap-on mount to a 35 mm DIN rail per EN 60715. The 1P+N width (two modules) fits standard distribution boards. Supply side connects to the top terminals; load side exits the bottom. The neutral bar is integral — no separate neutral link to wire. Torque the terminals to the value marked on the device side; over-torquing cracks the housing and voids the rating.