What this MCCB is and what it does
The Siemens 3VA2216-5JP42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 160 A continuous current, with a 4-pole configuration and an ETU550 electronic trip unit. It's designed for line protection in distribution panels, meaning it guards cables and busbars against overloads and short circuits — not motor protection, which needs a different trip curve. The ETU550 gives you adjustable long-time, short-time, instantaneous, and ground-fault settings, plus a communication function for remote monitoring or integration with a BMS.
Breaking capacity — what it means for your fault level
This breaker's interrupting rating changes with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V. At 415 V, that 121 kA covers most industrial secondary-distribution fault levels without needing a current-limiting upstream device. The 4.5 kA at 690 V is lower — if your system runs at 690 V, verify the available fault current at the panel doesn't exceed that. The insulation voltage is rated 800 V, so the breaker itself is built for 690 V systems, but the interrupting rating is the binding constraint.
Thermal performance and panel fit
The 160 A rating holds across the full ambient range from 40 °C to 70 °C — no derating needed in a warm enclosure. Power loss at rated current is 19.7 W, which matters for heat buildup in a sealed panel. Footprint is 140 mm wide, 181 mm high, 86 mm deep. That's a standard 4-pole MCCB form factor for a 160 A frame; it'll fit a typical DIN-rail or panel-mount cutout, but check the depth clearance against the enclosure door or busbar stack. IP40 on the front means it's protected against tools and wires above 1 mm — fine for a clean indoor panel, but not for washdown areas.