The Siemens 5SV3352-6 is a SENTRON 4-pole residual current circuit breaker (RCCB), Type A, rated 25 A with 30 mA sensitivity at 500 V AC. It's an instantaneous-trip device — no intentional short-time delay — so it responds immediately to earth leakage, which is the standard choice for general-purpose shock protection in residential and commercial distribution boards.
Mounting and panel fit
Snaps onto DIN rail (REG profile) and occupies 4 modular width units at 60 mm grid spacing. Overall dimensions: 72 mm wide × 90 mm tall × 70 mm deep. Mounting position is unrestricted — horizontal, vertical, or upside-down — which helps when fitting into a crowded enclosure. The 70 mm installation depth matches the standard SENTRON modular range, so it sits flush with adjacent MCBs and RCBOs on the same rail.
Ratings and what they mean for the panel
The 30 mA trip threshold is the standard for personal protection against direct contact (IEC 60364-4-41). Type A detection covers sinusoidal AC residual currents plus pulsating DC — the kind produced by single-phase rectifiers in washing machines, LED drivers, and small VFDs. The 25 A rated current handles the full load of a submain or a large final circuit; the 10 kA short-circuit current rating (SCCR) means the device can safely interrupt a fault up to that level when backed by an upstream overcurrent protective device rated at 63 A max (the permissible series fuse limit).
Environmental and compliance notes
Rated for ambient temperatures from -25 °C to +45 °C operating, with storage down to -40 °C. Silicon-free construction — relevant for automotive or paint-shop environments where silicone outgassing can cause adhesion failures. IP20 protection applies once installed in a distribution board with conductors connected; the device itself is not rated for wet or dusty locations without an enclosure. Overvoltage category III, suitable for fixed installation downstream of the utility meter.