What this breaker delivers
The Siemens 3VA2225-6JP32-0LA0 is an IEC frame 250 molded-case circuit breaker with class H breaking capacity — 85 kA at 415 V AC. That rating means it can safely interrupt a fault current up to 85 kA without welding its contacts or rupturing the arc chamber, which is the threshold for high-fault installations like transformer secondaries or large motor control centers. Long-time overload adjustable 100–250 A, short-time 0.6–10x In, instantaneous 1.5–10x In. Neutral conductor protection is optional via an external current transformer, and the universal release (UNI) accepts 24 V DC for remote shunt-trip or undervoltage release — common in emergency-stop chains or PLC-controlled disconnects.
Panel integration notes
Mounts in a standard DIN-rail or fixed-panel footprint for the 3VA2 frame 250. The ETU550 trip unit is field-replaceable without removing the breaker from the bus — useful for retrofitting a different protection curve without re-wiring.