What this MCCB carries — and the ratings that decide fit
The Siemens SENTRON 3VA1116-5EF32-0CA0 is a 3-pole molded case circuit breaker rated for line protection, with a continuous current of 160 A at 40 °C, derating to 150 A at 70 °C. That thermal-magnetic TM240 release means it handles overload and short-circuit protection in one device — no separate trip unit to spec. The 187 kA breaking capacity at 240 V tells you it can clear a fault on a high-capacity transformer secondary without the breaker itself failing; at 415 V that figure is 121 kA, and at 690 V it still holds 17 kA. Insulation voltage is rated 800 V, so it's comfortable on 690 V line-to-line systems. This variant ships with an undervoltage release (UVR) built in — the auxiliary release type is specifically an undervoltage release (UVR), so the breaker trips automatically when supply voltage drops below a threshold. That's a common requirement for motor feeder circuits where you want the breaker to drop out on loss of control power. No communication function, no ground-fault monitoring; it's a straight line-protection MCCB with UVR.
Panel fit and mounting — what the dimensions mean for your enclosure
The 3VA1116-5EF32-0CA0 measures 70 mm deep, 76.2 mm wide, and 130 mm high. That 3-inch width is standard for a 3-pole MCCB in this frame size — it fits the usual DIN-rail or mounting-plate footprint without crowding adjacent devices. The 70 mm depth leaves room behind the panel door for wiring gutters; watch the bend radius on 160 A cable lugs if your enclosure is shallow.