The Siemens 3VA1116-4EF32-0BA0 is a SENTRON molded case circuit breaker (MCCB) rated for 160 A continuous at 40 °C on a 3-pole frame, designed for line protection in distribution panels. Breaking capacity runs 121 kA at 240 V and still holds 75.6 kA at 415 V, which covers most industrial service-entrance and feeder applications without needing a current-limiting upstream device. The TM240 overcurrent release is a thermal-magnetic type — thermal for overload, magnetic for short-circuit — tuned to a 240 A fixed magnetic pickup, so it's a straight swap into a panel spec'd for a standard MCCB with that trip curve. An undervoltage release (UVR) is built in, which means the breaker trips if control voltage drops below a threshold — common for emergency-stop circuits or to prevent automatic reclosure after a brownout.
What the Ratings Mean for Fit
The 160 A rating holds flat from 40 °C to 50 °C, then derates to 150 A at 70 °C — that's a gentle slope, so in a warm panel (say 55 °C) you still get 158 A of headroom. At 690 V the breaking capacity drops to 11.9 kA — that's still enough for most 690 V motor branch circuits, but verify against your available fault current if you're on a high-capacity transformer. Insulation voltage is rated 800 V, so the breaker is physically rated for 690 V systems without derating the insulation path. No communication module, no ground-fault monitoring, no trip indicator — this is a bare-bones line-protection MCCB.
Physical Fit & Panel Integration
Footprint is 76.2 mm wide, 130 mm tall, 70 mm deep — standard 3-pole MCCB envelope for a 160 A frame. Mounts on a DIN rail or direct panel-mount via the rear slots. Power loss at full load is 40.5 W — factor that into your enclosure thermal calculation if you're packing several breakers in a sealed cabinet. Operating range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limit governs handling and shipping, not running.