Residual current circuit breaker, Type A, 40 A, 30 mA, 10 kA
The Siemens 5SV3344-6MJ01 is a residual current operated circuit breaker (RCCB) Type A, rated 40 A with a 30 mA trip sensitivity and a 10 kA short-circuit capacity. It is a 3+N-pole unit for 400 V systems, carrying a short-time-delayed G characteristic — meaning it tolerates brief transient leakage currents without nuisance tripping, which is useful on circuits with electronic loads that produce a start-up pulse.
Panel integration
This is a DIN-rail-mount residual current device, 4-module width (4 MW per the description), designed for snap-on installation in distribution boards and sub-distribution panels. The short-time-delayed G characteristic supports selective coordination with downstream RCDs, reducing the risk of a single fault taking out an entire sub-main.