What this MCCB is and what it handles
The Siemens SENTRON 3VA1116-3FE42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for continuous current of 160 A at 40 °C, with a TM220 thermal-magnetic release. It's built for line protection in distribution panels — the 4-pole configuration covers three-phase plus neutral, with the neutral protected at 50% of the phase rating. Breaking capacity hits 75.6 kA at 240 V AC, 52.5 kA at 415 V, and still holds 11.9 kA at 690 V, so it handles high-fault utility feeds without cascading upstream. The 800 V rated insulation voltage (Ui) and 600 V DC max operational voltage (Ue) mean it's also usable in DC bus applications up to that voltage.
Ratings that matter for panel fit
Current rating holds flat at 160 A from 40 °C up to 50 °C, then derates to 158 A at 55 °C and 150 A at 70 °C — that's a gentle slope, so you don't lose much headroom in a warm enclosure. The TM220 release means the thermal element is fixed at 160 A (no interchangeable rating plug), and the magnetic pickup is factory-set. If you need adjustable thermal or electronic trip, you'd look at the 3VA1 with ETU releases instead. Power loss is 38 W max — factor that into your enclosure thermal calc.
Mounting and integration
Dimensions are 101.6 mm wide, 130 mm tall, 70 mm deep — standard SENTRON 3VA1 footprint for 160 A frame. Front IP40 protection keeps dust out of the panel cutout. The breaker accepts optional motor drive (listed as available) for remote trip or reset. No communication function onboard; this is a standalone thermal-magnetic MCCB.