What it is and what it does
The Siemens SENTRON 5SV3314-6 is a 2-pole residual current operated circuit breaker (RCCB), Type A, rated 40 A with a 30 mA residual trip threshold for 230 V AC 50 Hz circuits. The Type A designation means it detects both sinusoidal AC fault currents and pulsating DC fault currents — the kind you get from rectified loads like switching power supplies, VFDs, or LED drivers. The 30 mA trip level is the standard for personal protection against direct contact (hand-to-hand or hand-to-ground path) per IEC 61008-1.
Key ratings and what they mean for fit
The 40 A continuous rating at 230 V AC covers most residential and light commercial sub-circuits — lighting, general-purpose sockets, small HVAC units. The 10 kA short-circuit current rating (SCCR) means the device can safely interrupt a fault current up to 10 kA without welding its contacts or rupturing the enclosure; that's sufficient for most domestic and commercial distribution boards where the prospective short-circuit current is below 10 kA. The 2-pole design (switching both line and neutral) is typical for single-phase RCCBs in markets where neutral switching is required by code.
Mounting and integration
Snaps onto a standard 35 mm DIN rail (EN 60715) and occupies 2 modular width units (36 mm total). The 70 mm installation depth fits standard distribution boards with 60 mm grid spacing. Supply can enter from top or bottom — no orientation restriction. IP20 rated once installed in a distribution board with conductors connected; that's fine for enclosed panels, not for wet or dusty environments without an outer enclosure.