The Siemens 5SM2622-0 is a 2-pole residual current device (RCD) from the SENTRON series, rated 40 A with a 300 mA trip threshold for 230 V AC circuits. It is designed as an add-on RCD unit for the 5SY miniature circuit breaker line, fitting into the same DIN-rail mounting scheme at 2 modular width units (36 mm). Type AC detection means it responds to sinusoidal AC residual currents — the standard choice for general-purpose socket-outlet and lighting circuits where no rectified or pulsed DC fault currents are expected. The 300 mA rating is typical for fire-protection or submain protection, not for personal shock protection (which requires ≤30 mA).
Lifecycle and Sourcing
The 5SM2622-0 carries an Active lifecycle status, so it remains in Siemens' current production portfolio. No end-of-life notification or last-time-buy window is in effect. For volume or scheduled BOM requirements, the part is quoted to order against an RFQ through independent distribution channels; availability and current pricing are confirmed at quote time.
Panel Integration and Environment
Mounts on standard DIN rail (fastening method REG) in any orientation, with a 70 mm installation depth that matches the 5SY MCB footprint. The 2-MW width (36 mm) occupies two adjacent 18 mm slots. Rated for overvoltage category III and pollution degree 2, so it is suited for distribution boards and sub-distribution panels in residential or commercial infrastructure. IP20 with connected conductors — enclosed panel required; not for washdown or outdoor exposure. Operating temperature range is -5 °C to 45 °C, with storage from -40 °C to 75 °C. The mechanical service life is rated at 10,000 operating cycles typical. Power dissipation per pole at rated current in hot state is 1.9 W — factor into enclosure thermal calculations when grouping multiple units.