Transformer protection breaker with Class 10 trip
The Siemens SIRIUS 3RV1431-4DA10-ZX95 is a 3-pole circuit breaker designed specifically for transformer protection, rated at 25 A continuous current and 11 kW at 400 V in AC-3 duty.
Breaking capacity — what the curve tells you
This breaker delivers 100 kA interrupting capacity at 240 V AC, dropping to 50 kA at 400 V, 12 kA at 500 V, and 5 kA at 690 V.
Screw-type box terminals on the main circuit accept 2× (0.75…16 mm²) solid or 2× (0.75…25 mm²) stranded, with a single run up to 35 mm² stranded. The 55 mm width and 149 mm depth leave room for auxiliary switch add-ons (product extension available).
