What the ratings mean for fit
The 5SV3614-6 is a Siemens SENTRON residual current circuit breaker (RCCB) — a 2-pole, instantaneous-trip device rated 40 A at 40 °C with a 300 mA residual trip threshold. The Type A designation means it detects sinusoidal AC fault currents plus pulsating DC fault currents up to 6 mA smooth DC, covering most modern electronic loads (VFDs, switched-mode supplies, LED drivers) that a plain AC-type RCCB would miss. The 10 kA short-circuit current rating (SCCR) per IEC 61008-1 tells you this device can safely interrupt a fault up to 10 kA without welding its contacts or rupturing the enclosure — critical for coordination with an upstream MCB or fuse that must clear before the RCCB sees its limit. The supply voltage is rated 230/400 V AC at 50 Hz — the 230 V is the phase-to-neutral voltage for a single-phase feed; the 400 V is the phase-to-phase voltage when the device is used in a three-phase system with the neutral conductor passing through. The 2-pole construction (switching both line and neutral) is standard for single-phase RCCBs in many European and UK distribution boards; the 2-module-width (36 mm) footprint snaps onto a standard DIN rail and occupies two 18 mm modular spaces. Derating is built into the spec: at 45 °C the rated current drops to 38.1 A, at 50 °C to 35.59 A, and at 70 °C to 17.6 A. If your panel ambient runs above 40 °C, size the upstream protection accordingly — the RCCB itself will not trip on overload (it has no thermal element), but its internal components must stay within the thermal limit. The permissible I²t of 58 000 A²·s and let-through current of 5 200 A are the energy and peak current the device can withstand during a fault before the upstream protective device clears.
Sourcing and lifecycle
The device carries an IP20 rating (with distribution board installed and conductors connected), which is the standard touch-protection level for panel-mounted components — it is not rated for wet or dusty environments. The silicon-free feature is relevant for automotive or paint-shop applications where silicone outgassing can cause adhesion failures.
Integration notes
Mounts on a DIN rail (REG) in any position — top or bottom feed is permitted. The 70 mm depth and 90 mm height fit standard 60 mm grid-spacing enclosures. The overvoltage category III rating means it is suitable for fixed installation downstream of the main distribution board, not for direct connection to the utility supply. The surge current resistance is rated 1 kA (8/20 µs waveform) per IEC 61008-1 at 0.5 kA — this is the impulse current the device can withstand without nuisance tripping. If your installation is subject to frequent lightning surges (rural overhead lines, long cable runs), consider adding a surge protective device upstream to reduce stress on the RCCB.