The Siemens SENTRON 5SV4317-0KL is a 2-pole residual current circuit breaker (RCCB) rated 80 A at 50 Hz, with a 30 mA trip threshold and Type AC sensitivity — meaning it detects sinusoidal AC fault currents only, not pulsed DC or smooth DC. It's an instantaneous design (no short-time delay), so it trips as soon as the residual current exceeds 30 mA. That makes it a straight ground-fault protector for general-purpose AC circuits where no delayed selectivity or DC component is expected. The 80 A rating holds at 40 °C ambient; derate to 77.87 A at 45 °C, 74.77 A at 50 °C, and so on down to 48.2 A at 70 °C. If your panel runs hot, the 80 A nameplate doesn't apply — check the derating curve.
Snaps onto DIN rail (REG), any mounting position. The 70 mm installation depth matches standard distribution board clearance; no extra depth needed behind the rail. Silicon-free construction, so it won't outgas contaminants near sensitive electronics.
Current production.
Fault ratings and standards
Short-circuit current rating (SCCR) is 10 kA per the general spec, with a lower 0.8 kA rating when tested per EN 60898 or IEC 61008-1 — the standard for RCCBs in household and similar installations. Let-through energy (I²t) is 110 000 A²·s permissible; let-through current peaks at 7 100 kA (likely a data-entry unit error — 7.1 kA peak is realistic for this class). Overvoltage category III, suitable for fixed-installation downstream of the service entrance.