What the ratings mean for fit
The 3VA2325-5HM32-0BK0 is a Siemens 3VA2 IEC frame 400 molded case circuit breaker with a breaking capacity class M rating of Icu=55kA at 415V AC. That 55kA interrupting rating means this breaker can safely clear a fault current up to that magnitude without rupturing — critical for main or feeder positions in industrial switchboards where available fault current is high. The 3-pole construction suits three-phase line protection. The ETU330 electronic trip unit provides LIG protection: Long-time (overload) adjustable Ir=100A to 250A, Instantaneous (short-circuit) adjustable Ii=1.5 to 12 times In, and Ground-fault protection with adjustable Ig=0.2 to 1 times In and time delay tg=0.1 or 0.3 seconds. This selectivity suite lets you coordinate downstream breakers and minimize nuisance trips on transient faults.
Accessories and deployment context
This unit ships with a nut keeper kit, an undervoltage release (UVR) rated 24V DC, one auxiliary switch HQ, one trip alarm switch HQ, and one electrical alarm switch. The UVR ensures the breaker trips on loss of control voltage — a standard safety interlock for emergency-stop circuits or undervoltage protection on motor feeders. The auxiliary and alarm contacts feed status back to a PLC or SCADA for remote indication. Mounts in standard IEC panelboard or switchgear cubicle; the frame 400 footprint is common across the 3VA2 family, so retrofitting an existing installation with this unit typically requires no busbar rework.