What the ratings mean for fit
The 3VA2225-6HL32-0DK0 is a Siemens 3VA2 IEC frame 250 molded-case circuit breaker with a breaking capacity class H rating of Icu=85kA at 415 V AC. That 85 kA interrupting rating means it can safely clear a fault current up to that level at the line terminals — critical for high-fault installations where upstream transformer capacity or parallel feeds push available fault current into the 50+ kA range. The 3-pole, 250 A frame (In=250A) is fitted with an ETU320 LI trip unit offering adjustable overload protection (Ir = 100 A to 250 A) and short-circuit protection (Ii = 1.5 to 10 x In). The LI curve (long-time + instantaneous, no short-time delay) suits it for feeder or distribution duty where you need thermal-magnetic-style coordination but with electronic adjustability. This order code also includes an undervoltage release (208-230 V AC, 50/60 Hz) and one auxiliary switch channel — factory-fitted accessories that save panel wiring time. The undervoltage release trips the breaker when control voltage drops below the dropout threshold, a standard requirement for safety circuits in furnace or motor control panels where loss of control power must open the main disconnect.
Deployment context
Mounts on a standard DIN rail or panel-mount baseplate in an enclosure. The 3VA2 frame accepts plug-in or fixed connections; the included undervoltage release and auxiliary switch are wired to the control circuit, not the main power path. In a typical furnace or process line, this breaker sits between the step-down transformer and the motor control center — the 85 kA SCCR at 415 V gives headroom for high-fault industrial grids.