The Siemens SENTRON 5SV4447-0 is a 4-pole residual current circuit breaker (RCCB) rated 80 A with a 100 mA trip threshold, AC type, instantaneous response. It occupies 4 modular-width units on a DIN rail and carries a 10 kA short-circuit current rating. The IP20 enclosure suits enclosed distribution boards only — not exposed washdown areas.
Ratings and what they mean for fit
The 80 A rating holds at 40 °C ambient; at 45 °C it derates to 77.57 A, and at 55 °C it drops to 70.22 A. If your panel runs hot — say 60 °C — the continuous current capacity falls to 64.47 A, so a full 80 A load would nuisance-trip. The 100 mA trip is for equipment protection or submain feeders, not personnel shock protection (30 mA is the standard for that). The 10 kA SCCR per IEC 61008-1 means it can safely interrupt a fault up to 10 kA without upstream fuses opening. The 0.8 kA rating under EN 60898 is a lower conditional rating for domestic boards — in industrial panels the 10 kA figure governs.
Panel integration
Snap-on DIN rail (REG) mount, any position. Depth is 70 mm, width 72 mm (4 MW), height 90 mm. Supply feeds from top or bottom. Silicon-free construction. The IP20 rating requires the distribution board to be installed and conductors connected — open-panel mounting is not permitted.