The Siemens 3VA2116-5HL32-0DH0 is a 3-pole SENTRON molded case circuit breaker rated for 160 A continuous current at 40 °C, built around the ETU320 electronic trip unit for line protection duty. The 121 kA at 415 V and 440 V, and 79 kA at 500 V, keep it viable across common industrial voltages without stepping up to a larger frame. The ETU320 release provides electronic overload and short-circuit protection with adjustable settings, making it suitable for feeder circuits where precise coordination with downstream breakers is needed.
At 55 °C it drops to 154 A, at 60 °C to 148 A, and at 70 °C to 136 A. If your enclosure runs hot near the upper operating limit of 70 °C, plan for that 15 % reduction from the nameplate. The maximum power loss of 28 W should be factored into your thermal budget, especially in a sealed or high-density panel.
The undervoltage release coil and auxiliary contact wiring share the same terminal zone; verify free-wheel diode polarity on the UVR coil if your control circuit uses DC switching. The ETU320 is powered by internal current sensing — no external control power needed for the trip unit itself.