The Siemens SENTRON 3VA2225-6HN32-0HH0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current, designed for line protection in distribution panels. Its interrupting capacity hits 242 kA at 240 VAC, dropping to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V — so on a 480 V industrial service you've got 121 kA of fault-clearing headroom, enough for high-available-fault-current switchgear.
Thermal derating and power loss
The breaker holds its full 250 A rating from 40 °C up to 50 °C ambient. Above that, it derates linearly: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel runs hot — say a non-ventilated enclosure near a furnace line — that 213 A at 70 °C figure is the one to spec against, not the nameplate. Maximum power loss is 48 W, which matters for enclosure thermal calculations.
Auxiliary configuration and releases
This variant ships with a shunt trip release (STL) for remote tripping, plus 2 auxiliary switches and 1 trip alarm switch (HQ configuration). The shunt trip lets a PLC or safety relay kill the breaker remotely — common on emergency-stop circuits or automated shutdown sequences. No undervoltage release fitted, no ground-fault monitoring, no communication module. The basic switch supplied is 3VA2225-6HN32-0AA0.
Environmental and mechanical
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Dimensions are 181 mm high, 105 mm wide, 86 mm deep — standard SENTRON 3VA form factor for panel-mounted MCCBs. Trip indicator and voltage trigger are present, so you get local visual status and the ability to wire a remote trip signal.