What this MCCB carries — and what it means on the line
The Siemens SENTRON 3VA2216-7MN32-0DH0 is a 3-pole molded case circuit breaker rated a full 160 A across the entire operating temperature band from 40 °C to 70 °C — no derating curve to chase when the panel runs hot. That flat thermal profile matters for motor protection circuits where ambient inside the enclosure can climb well past 50 °C. Breaking capacity hits 330 kA at 240 V AC, stepping down to 242 kA at 415 V and 440 V, then 187 kA at 500 V. At 690 V it still holds 4.5 kA. For a motor protection MCCB, that SCCR headroom means it can sit upstream of a line of smaller breakers without cascading failure on a high-fault bolted fault. This is a motor protection design — the trip curve and auxiliary switch complement are tuned for starting inrush and overload profiles on induction motors, compressors, and pumps. The built-in undervoltage release drops the breaker on a sag or dropout, which is standard for safety circuits that need a restart sequence rather than an automatic reclose.
Panel fit and aux switching
Footprint is 105 mm wide × 181 mm tall × 86 mm deep — standard 3-pole MCCB envelope for a 160 A frame. The depth (86 mm) means it clears most 200 mm deep enclosures with room for rear bus connections. Auxiliary switch complement is 2 auxiliary switches plus 1 trip alarm switch HQ. That gives three independent signal paths: two for status feedback (open/closed) and one dedicated to the trip event. Useful for a PLC input that needs to distinguish a manual open from a fault trip without extra wiring. Max power loss is 22.2 W — within the range for a 160 A frame, but worth noting if you're packing multiple breakers in a sealed enclosure. The -25 °C to +70 °C operating range covers most indoor industrial environments; storage range extends from -40 °C to 80 °C.