The Siemens 5SV3314-6LA is a SENTRON residual current circuit breaker (RCCB), 2-pole, Type A, rated 40 A with a 30 mA trip sensitivity, for 230 V AC, 50 Hz systems. It includes thermal overload protection — that's the 'with thermal overload protection' variant, so it combines ground-fault and overcurrent protection in one 2-module-width (36 mm) package.
At 36 mm wide (2 modular width units) and 70 mm deep, it fits standard 60 mm grid-spaced enclosures. Top or bottom feed is allowed, which simplifies panel wiring when the busbar arrangement isn't fixed.
Type A detection catches sinusoidal AC residual currents plus pulsating DC — covers most modern electronics and single-phase rectified loads. Instantaneous design (no short-time delay) means it trips within milliseconds on a ground fault, which is correct for final-circuit protection but won't coordinate with upstream delayed-type RCCBs if you need selectivity. Mechanical life of 10 000 operating cycles is typical for this class — fine for distribution, not for frequent switching duty.