The Siemens 3VA2040-7JP32-0AA0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for 40 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Its 3-pole construction and ETU550 electronic trip unit make it a line-protection breaker with communication capability, suited for main or feeder duty in distribution panels where you need adjustable protection curves and remote monitoring.
Breaking capacity across the voltage range
This MCCB delivers 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V. The steep drop at 690 V reflects the physical limits of the arc-extinction chamber at that voltage — if your system runs 690 V line-to-line, verify the available fault current stays under 3 kA, otherwise step up to a higher-rated frame. For 400 V-class panels (the common industrial distribution voltage), the 242 kA interrupting rating covers virtually any utility transformer size you'll encounter.
Physical fit and panel integration
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep — a 3-pole MCCB footprint that fits standard Siemens 3VA switchboard and panelboard mounting. Front IP40 protection means it's suitable for enclosed distribution boards where the door or cover provides the environmental seal; it's not rated for washdown or outdoor exposure without an additional enclosure.
Trip unit and communication
The ETU550 is an electronic trip unit with LSI protection curves (long-time, short-time, instantaneous) plus ground-fault alarm or trip options — though this particular variant ships without ground-fault monitoring. The communication function enables integration with energy management systems or PLCs via the 3VA communication modules, allowing remote trip indication, current metering, and parameter adjustment. No undervoltage release, voltage trigger, or trip indicator is fitted from the factory; those are field-addable accessories if your application requires them.