The Siemens SENTRON 3VA2140-5HK42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying 40 A continuous current across its full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Its interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 76 kA at 500 V, and 17 kA at 690 V — figures that let it ride through high-fault scenarios typical of industrial distribution without cascading upstream. The ETU340 electronic trip unit provides adjustable N-conductor protection (OFF or 100%) and a fixed long-time delay (tr) of 1300 ms, giving selectivity headroom for downstream feeders.
The 3VA2140-5HK42-0AA0 measures 86 mm deep, 140 mm wide, and 181 mm tall — a 4-pole footprint that fits standard SENTRON panel cutouts and busbar systems.
Mechanical endurance and storage
Latching endurance is 20,000 cycles.