The Siemens SENTRON 3VA2040-4JQ32-0AA0 is a 3-pole molded case circuit breaker rated for 40 A continuous at 40 °C through 70 °C — no derating needed across that full ambient range, which simplifies panel design in warm enclosures. The interrupting capacity hits 121 kA at 240 V AC and 75.6 kA at 415 V AC, so it handles high-fault scenarios typical of industrial distribution without cascading upstream. The ETU560 electronic trip unit provides adjustable N-conductor protection from OFF to 160 %, plus communication capability for integration into a monitored distribution system.
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint for the SENTRON 3VA platform. The 105 mm width fits a typical 4-module DIN-rail or panel-mount cutout. Front IP40 protection means it's suitable for general indoor panel use but not washdown areas.
The 40 A frame with 121 kA SCCR at 240 V gives substantial headroom for transformer-fed panels.