What this MCCB delivers
The Siemens SENTRON 3VA2140-7HL36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 40 A continuous current with an ETU320 electronic trip unit, designed for line protection in distribution panels. Its interrupting capacity hits 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V — so it clears high-fault scenarios at the lower voltages common in industrial switchgear, while still handling the reduced duty at 690 V. The 800 V rated insulation voltage means it can sit on a 690 V bus without derating the insulation system. Rated current holds flat at 40 A from 40 °C through 70 °C ambient — no derating curve to chase across a warm panel. That thermal stability comes from the electronic trip design; a thermal-magnetic breaker would typically need a derate factor above 40 °C. The front face carries IP40 protection, enough for a clean indoor enclosure but not for washdown areas.
Panel fit and mounting
Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep — a standard SENTRON 3VA footprint that drops into a DIN-rail or screw-mounted panel assembly. The 86 mm depth leaves clearance behind a 200 mm deep enclosure for wiring and lug access. Power loss is a modest 1.6 W maximum, so heat buildup in a dense row of breakers stays manageable.