Rated current and thermal derating
The 3VA2225-7HL32-0KH0 carries a continuous current rating of 250 A at 40 °C, and it holds that full 250 A through 50 °C ambient — no derating needed up to that point. At 55 °C it drops to 241 A, then 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. For a panel that runs warm, the 55 °C figure is the one to size against; staying at 250 A means keeping ambient below 50 °C around the breaker.
Breaking capacity by system voltage
Breaking capacity varies sharply with voltage. At 240 V it interrupts 330 kA; at 415 V and 440 V it handles 242 kA; at 500 V it drops to 187 kA. At 690 V the rating falls to 4.5 kA — that's the limit for a 690 V line, and it means this frame is not intended for high-fault 690 V applications. For a 480 V panel (common in North America) the 187 kA figure at 500 V is the relevant bound, and it gives substantial headroom for most industrial service-entrance or feeder duty.
Adjustable trip range and internal configuration
The thermal-magnetic trip is adjustable from a minimum of 375 A up to a maximum of 2 500 A. That range covers feeder protection for downstream subpanels or large motor circuits. Internally, the breaker ships with a basic switch 3VA2225-7HL32-0AA0, plus 2 auxiliary switches and 1 trip alarm switch (HQ designation), and a shunt trip release (STL) for remote tripping. There is no undervoltage release, no communication module, and no ground-fault monitoring on this variant — it is a straightforward line-protection MCCB with remote-trip capability.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep. The 105 mm width is a 3-pole frame; it mounts on a DIN rail or directly to a backplate. The 86 mm depth is shallow enough for most standard distribution boards. Power loss at full rated current is 48 W maximum — account for that in the enclosure thermal calculation, especially if multiple breakers are ganged.
Temperature and storage range
Operating ambient range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. The storage minimum is the relevant bound for cold warehouses or unheated shipping — the breaker can sit at -40 °C without damage, but it must be warmed above -25 °C before energizing.