What the ratings mean for your panel
The Siemens SENTRON 3VA2225-5JP32-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, with an adjustable thermal-magnetic trip range from 375 A minimum to 2500 A maximum — meaning you can dial the protection band to the actual load without swapping the breaker frame. The interrupting ratings tell you where this breaker can sit in the distribution: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V. That 187 kA figure at 240 V covers high-fault utility feeds; the 4.5 kA at 690 V still clears a fault on a 690 V motor drive bus, though you'd check coordination with the upstream device. It carries a communication function onboard — no separate module needed for basic status and remote trip indication — and the built-in 1 auxiliary switch plus 1 trip alarm switch (HQ design) gives the PLC a clean dry-contact signal that the breaker has tripped.
Derating and thermal management
The breaker holds full 250 A from 40 °C through 50 °C, then derates linearly: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. If your enclosure runs hot — say a solar combiner or a crowded switchboard — size the feeder for the derated figure at the expected ambient. Maximum power loss is 48 W. That's the heat to vent in the enclosure; for a DIN-rail or panel-mount install, check that the cubicle's thermal budget covers it, especially if several breakers are ganged. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limit governs handling and warehousing, not running.
Physical fit and integration
Dimensions: 181 mm height, 105 mm width, 86 mm depth. The depth is the critical dimension for shallow enclosures — 86 mm (3.39 in) means it fits most standard distribution boards without a deep can. The basic switch (the thermal-magnetic trip unit) is order code 3VA2225-5JP32-0AA0; the -0AF0 suffix adds the communication function and the HQ auxiliary/trip alarm switch pack. If you're replacing an existing 3VA frame, verify the trip unit matches your required curve.