The Siemens SENTRON 3VA2116-8KQ32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 160 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to the enclosure limit. That flat thermal curve simplifies panel design: you don't have to oversize the frame for a warm cabinet. Equipped with an ETU860 electronic trip unit, it provides line protection with adjustable long-time (tr) from 0.5 s to 20 s and short-time delay (tsd) up to 0.5 s. The interrupting ratings are substantial: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 53 kA at 690 V — figures that cover high-fault utility feeds and large transformer secondaries. The 160 A frame with full-range thermal stability means this MCCB handles motor control center (MCC) incoming feeders or large distribution panel mains without a summer/winter re-rating exercise. Ground fault monitoring via summation current formation on the L-conductor is built in, and the communication function allows integration into a plant monitoring system.
Panel Integration
Dimensions are 181 mm high, 105 mm wide, and 86 mm deep (7.1 × 4.1 × 3.4 in). The IP40 front protection suits enclosed panel mounting where the breaker face is behind a door. The 19.7 W maximum power loss should be factored into the enclosure thermal budget, especially in a multi-breaker lineup. Rated insulation voltage is 800 V, and the latching endurance is rated at 20,000 operations — a figure that matters for applications requiring frequent manual switching under load, not just fault protection.