The Siemens 3VA2225-5JP32-0AA0 is a SENTRON 3VA2 molded case circuit breaker rated for 250 A continuous current across a 3-pole configuration, fitted with the ETU550 electronic trip unit. The 187 kA interrupting rating at 240 VAC and 121 kA at 415/440 VAC give it the headroom to clear high-fault conditions without upstream coordination issues, which keeps a weld line or conveyor string from cascading into a plant-wide blackout when a downstream fault occurs.
Above that, the ETU550 derates linearly: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. If this MCCB sits in a non-ventilated enclosure near other heat sources — common in a packed automotive panel — the 55 °C column is the realistic planning number.
The 86 mm depth includes the arc-chamber housing; verify clearance to the gland plate or enclosure door if rear-access bus bars are used.
Communication and trip-unit capability
The breaker does not include an undervoltage release or shunt trip as standard; those are add-on accessories. The insulation voltage rating of 800 V means it is suitable for 690 VAC systems where the 4.5 kA interrupting rating at 690 V applies — that is a niche application, but the breaker is rated for it.