What this 160 A MCCB carries
The Siemens SENTRON 3VA1116-5EF32-0JC0 is a 3-pole molded case circuit breaker rated for 160 A continuous current across the 40 °C to 50 °C ambient range — no derating needed in a typical 40 °C panel. At 55 °C it still holds 158 A, and at 70 °C it's good for 150 A, so you get usable headroom even in a hot enclosure. Breaking capacity is 187 kA at 240 V, dropping to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That 187 kA figure at 240 V tells you this breaker handles high-fault scenarios common on the secondary side of large step-down transformers. It's designed for line protection — that's the SENTRON designation — and comes factory-fitted with a shunt trip release (STL) plus two auxiliary switches HQ. No undervoltage release, no ground-fault monitoring, no communication module. If you need those, this isn't the variant.
Panel fit and integration
Footprint is 70 mm deep by 76.2 mm wide by 130 mm tall (2.76 by 3 by 5.12 inches). 3-pole width. Power loss at rated load is 38 W maximum. That's manageable for a 160 A frame, but in a densely packed enclosure you'll want to account for it in your thermal budget — especially if you're stacking multiple breakers side by side without ventilation gaps.