What this MCCB delivers for your line
The Siemens 3VA2025-6KP42-0AA0 is a SENTRON molded case circuit breaker rated for 25 A continuous current across a 4-pole frame, fitted with an ETU850 electronic trip unit. Its 242 kA interrupting capacity at 240 V AC means it can clear a fault at that level without upstream fuses needing to open — a selectivity advantage for high-fault panels. The 800 V rated insulation voltage gives headroom for 480 V or 600 V distribution systems common in industrial plants.
Breaking capacity across voltage classes
This breaker's short-circuit performance varies sharply with system voltage: 242 kA at 240 V, 187 kA at both 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. The steep drop at 690 V tells you this is a 240–500 V primary-rated device; at 690 V it still clears, but coordination studies should use the 3 kA figure. The 25 A rating holds across the full ambient range from 40 °C to 70 °C — no derating needed for warm enclosures.
Panel integration and footprint
The 4-pole frame measures 140 mm wide by 181 mm high by 86 mm deep — a standard SENTRON 3VA footprint that fits existing DIN-rail or screw-mount panel layouts. IP40 on the front means it's protected against tools and wires during panel work, but the enclosure itself must provide the overall IP rating. The ETU850 trip unit supports communication and measurement functions, so plan for a wiring path to the control system if you're using those features.