160 A MCCB with ETU850 — selectivity and SCCR headroom
The Siemens 3VA2216-6KP32-0AA0 is a SENTRON 3VA2 molded case circuit breaker rated 160 A continuous with an ETU850 electronic trip unit. The 242 kA breaking capacity at 240 VAC means this breaker can safely interrupt fault currents up to that level without upstream damage. The ETU850 is a microprocessor-based trip unit offering adjustable long-time, short-time, instantaneous, and ground-fault protection curves — though this variant ships without ground-fault monitoring. The communication function onboard allows integration into a power monitoring or control system, so the breaker can report status and trip events without additional interface modules. Rated insulation voltage is 800 V, covering most low-voltage distribution applications.
Panel fit and mounting
At 105 mm wide, 181 mm tall, and 86 mm deep, this 3-pole MCCB fits standard panel-mount cutouts for the 3VA2 frame size. The IP40 front protection means the breaker face is protected against tools and wires >1 mm — standard for indoor switchgear enclosures. No undervoltage release fitted, so if your design requires UVR for emergency stop or undervoltage protection, you'll need the accessory version or an external relay. Maximum power loss is 19.7 W — relevant for thermal management inside a sealed enclosure; ensure adequate ventilation or derating if multiple breakers are ganged. The ambient operating range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. The continuous current rating holds at 160 A across the full 40–70 °C range (–), so no thermal derating is needed within that band — a useful feature for warm panel environments.