What this 3VA2 breaker carries
The Siemens 3VA2216-5HN32-0BD0 is a 3-pole IEC molded case circuit breaker in the 3VA2 frame, rated for line protection with an ETU350 electronic trip unit configured for LSI (long-time, short-time, instantaneous) protection. Its headline breaking capacity is 55 kA at 415 V AC — class M on the IEC 60947-2 scale, meaning it safely interrupts fault currents up to that level without upstream cascading. The continuous current rating (In) is 160 A, with the long-time pickup (Ir) adjustable from 63 A to 160 A, so it covers a 63–160 A feeder or main breaker slot in a panel. Short-time pickup (Isd) is set from 1.5 to 10 times Ir, and instantaneous pickup (Ii) is fixed at 12 times In — a deliberate coordination curve for distribution panels where you need selective tripping downstream. The breaker ships with an undervoltage release (UVR) coil at 24 V DC and three auxiliary switches (HQ) for remote status indication. A nut keeper kit is included for panel-mounting on a DIN rail or direct screw-down.
Integration notes
The UVR coil draws from a 24 V DC control supply — verify polarity and that the supply can hold the coil energized continuously; dropout voltage is typically below 18 V DC. The three auxiliary switches (HQ) provide N/O + N/C contact sets for PLC or SCADA feedback, wired to the breaker's accessory slot. Mounting on a standard DIN rail or direct panel screw-down is supported; the nut keeper kit prevents hardware loss during installation.