The Siemens 5SV5614-6 is a SENTRON residual current operated circuit breaker (RCCB), 2-pole, Type A, rated 40 A with a 300 mA trip threshold, designed for 230 V AC residential and commercial distribution boards. It snaps onto a DIN rail (REG) and occupies 2 modular width units (36 mm wide) with a 70 mm installation depth — a standard 2-MW footprint that fits most European residential panels without crowding adjacent breakers.
The 5SV5614-6 is an instantaneous (non-delayed) Type A RCCB, meaning it trips immediately on detecting a sinusoidal AC residual current or a pulsed DC residual current up to 300 mA. Type A covers the typical waveforms from single-phase rectified loads — switch-mode power supplies, LED drivers, computer equipment — which a plain Type AC RCCB would not detect. The 6 kA short-circuit current rating (SCCR) per IEC 61008-1 is the withstand rating for the device itself under fault; the conditional rated short-circuit current with a backup MCB is 0.5 kA per EN 60898, which is the coordination value you size the upstream MCB to.
Mounts on a DIN rail (REG) in any position. The 70 mm installation depth is shallower than some legacy RCCBs, which helps in compact enclosures where cable bending radius is tight. Supply can enter from top or bottom. The IP20 rating applies only with the distribution board installed and conductors connected — the device itself is not sealed against dust ingress until it is enclosed in a panel.
Rated operating temperature range is -5 °C to 45 °C; storage range extends from -40 °C to 75 °C. The silicon-free construction is relevant for applications where silicone outgassing could contaminate contacts or optical surfaces. The mechanical service life is 3,000 switching cycles typical.