The Siemens 3VA2340-5HN32-0KE0 is a 3-pole molded case circuit breaker (MCCB) from the 3VA2 IEC frame 400 series, rated for line protection with an ETU350 electronic trip unit offering LSI (long-time, short-time, instantaneous) protection. At 415 V AC it delivers 55 kA breaking capacity (Icu), placing it in breaking capacity class M — adequate for high-fault industrial distribution panels where the available fault current is substantial.
Ratings and what they mean for the panel
The continuous current rating In is 400 A, with overload protection (Ir) adjustable from 160 A to 400 A — so the breaker can be set to match the actual load rather than changing the frame. Short-circuit protection (Isd) is adjustable from 1.5 to 10 times Ir, and the instantaneous pickup (Ii) is fixed at 10 times In. For a 400 A feeder, that means Ii trips at 4000 A, clearing hard faults fast. The shunt trip (STL) operates on 220–250 V DC or 208–277 V AC, letting a remote emergency-stop or fire-alarm signal open the breaker without an operator at the panel.
Integration notes
The breaker ships with a nut keeper kit and four auxiliary switches (HQ type) pre-installed, so it is ready for status feedback to a PLC or DCS without ordering additional contact blocks. The shunt trip occupies its own internal slot, leaving the auxiliary switch complement intact. Mounts in the standard 3VA2 panel cutout; verify bus-bar drilling pattern for the 400 A frame before assembly.