What it is and what it does
The Siemens 3VA2116-6KP32-0AA0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) carrying 160 A continuous current at 40 °C through all poles, with an ETU850 electronic trip unit that gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves. The interrupting ratings are the headline here: 242 kA at 240 V AC, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V — that's a serious fault-current capability for a 160 A frame, meaning it can sit upstream of a large distribution board or a high-fault industrial panel without needing a current-limiting fuse ahead of it. The 3-pole design handles three-phase loads, and the 800 V rated insulation voltage (Ui) gives headroom for 480 V or 600 V class systems. The front face carries IP40 protection — fine for a dry indoor panel, not for washdown.
What the ETU850 trip unit gives you
The ETU850 is an electronic overcurrent release with communication capability — the breaker has a communication function built in, so it can talk to a higher-level system for monitoring and remote trip indication. The neutral protection is adjustable from OFF to 20 % up to 160 % of the rated current. There's no undervoltage release or ground-fault monitoring version on this variant, so if you need those, you're looking at a different option code. Power loss is 25.5 W maximum at rated load — worth accounting for in a sealed enclosure with limited convection.
Physical fit and panel integration
The 3VA2116-6KP32-0AA0 measures 105 mm wide, 181 mm tall, and 86 mm deep — that's about 4.13 by 7.13 by 3.39 inches. It's a standard MCCB footprint for the 160 A frame, so it drops into a SENTRON panelboard or a DIN-rail adapter plate without surprises. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. No trip indicator on the front — you'd rely on the communication output or a local ammeter to know the state.