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. The 10 kA short-circuit current rating (SCCR) means it can safely interrupt faults up to that level without upstream damage, sized for residential and light commercial distribution boards.
Mounting and integration
Snaps onto DIN rail (REG) and can be mounted in any position — no orientation restrictions. 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. IP20 with connected conductors means it's protected against finger contact once wired, but it's intended for enclosed distribution boards, not open-panel washdown areas.
What the ratings mean for fit
Type A detection catches sinusoidal AC residual currents plus pulsating DC — covers most modern electronics and single-phase rectified loads. The 30 mA trip threshold is the standard for personal protection against direct contact (30 mA is the IEC limit for fibrillation risk). 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. Ambient range -25 °C to +45 °C covers most indoor panel environments; storage down to -40 °C. Mechanical life of 10 000 operating cycles is typical for this class — fine for distribution, not for frequent switching duty.