Rated breaking capacity is 4.5 kA at 230 V AC per IEC/EN60898-1 and GB/T10963.1 — that's the fault current it can safely interrupt without welding contacts or rupturing the case. For a domestic distribution board fed by a typical 60 A service, 4.5 kA is the usual specification; you'd step up to a 6 kA or 10 kA frame only if the prospective short-circuit current at the board exceeds that level. The 1P+N pole configuration with neutral switching means the neutral is opened and closed with the phase, so the circuit is fully isolated when the breaker is off — no floating neutral downstream. That matters for installations where local regulations require switched neutral or where you want to avoid a surprise live neutral during maintenance.
That's the same footprint as every other 1P+N SENTRON 5SL6 and 5SL3 series MCB, so it drops into an existing rail without any panel rework. IP20 with connected conductors — finger-safe when terminated, but not rated for wet or dusty environments. Keep it inside a distribution board or enclosure rated to the ambient conditions.
Ambient operating range is -25 °C to +45 °C at up to 85% relative humidity, derating to 43% rH between 45 °C and 60 °C. Storage range is wider: -40 °C to +75 °C, which covers most warehouse and transit conditions. Degree of pollution 2, overvoltage category III, so it's rated for fixed installations inside buildings where transient overvoltages are controlled by the upstream SPD.
Compliance documentation per IEC/EN60898-1 and GB/T10963.1 is standard with this brand.