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.
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.
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.