The 3VA2025-5KP32-0DA0 is a Siemens 3VA2 IEC frame 100 MCCB with breaking capacity class M, rated Icu=55kA at 415 V AC. It is a 3-pole unit configured for line protection with an ETU850 electronic trip unit set for LSI (long-time, short-time, instantaneous) curves. The continuous current rating In is 25 A, with overload protection Ir adjustable from 10 A to 25 A, short-time pickup Isd from 0.6 to 10x In, and instantaneous pickup Ii from 1.5 to 12x In. The class M designation places it in the medium breaking capacity tier within the 3VA2 family, suited for industrial distribution where fault levels are significant but not extreme.
Deployment context
The 3VA2 series is designed for selective coordination in industrial power distribution — the ETU850's LSI curves allow precise time-current discrimination with downstream breakers, reducing the chance of a nuisance trip taking out an entire sub-feed. The neutral conductor protection option (via external current transformer, up to 160% of In) makes this unit adaptable for 4-wire systems where ground-fault or neutral overload monitoring is required — a common need in North American and IEC installations alike.