SENTRON 3VA2 MCCB, 40 A Frame
The Siemens 3VA2140-7HN32-0AA0 is a SENTRON 3VA2 molded case circuit breaker with a 40 A continuous current rating and a 3-pole configuration. It uses the ETU350 electronic trip unit, designed for line protection — meaning it handles overload and short-circuit protection in distribution panels, not motor or generator circuits. The interrupting capacity hits 330 kA at 240 V AC, so it safely clears high-fault-current faults common in large industrial services or transformer secondaries without cascading upstream. Rated insulation voltage is 800 V, and maximum power loss is 1.6 W. The breaker is rated for continuous full current from 40 °C through 70 °C ambient — no derating needed across that span, which simplifies panel layout in warm enclosures. It carries an IP40 protection rating on the front, meaning it's protected against tools and small solid objects but not moisture; keep it inside a panel or enclosure with a higher overall IP rating.
Dimensions and Panel Fit
The 3VA2140-7HN32-0AA0 measures 86 mm deep, 105 mm wide, and 181 mm high. That's a compact 3-pole MCCB footprint — it fits standard Siemens 3VA2 panel cutouts and busbar connections. No undervoltage release, no ground-fault monitoring, no communication function on this variant: it's a straight thermal-magnetic replacement with electronic trip, not a metering or remote-trip device.