The Siemens 3VA2225-6KP32-0JH0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, with a 3-pole configuration and line protection design. Its interrupting capacity reaches 242 kA at 240 V AC, 187 kA at 415/440 V, and 121 kA at 500 V — figures that define the available fault-current headroom for the downstream panel. The part carries a shunt trip release (STL) and two auxiliary switches plus one trip alarm switch, making it suitable for remote tripping and status feedback in motor control centers or distribution boards.
Current derating and thermal limits
The 250 A rating holds flat from 40 °C to 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. Maximum power loss is 48 W. For a panel builder, this means the breaker can be loaded to nameplate in a 50 °C enclosure without derating — above that, the ampacity drops roughly 2.5 % per 5 °C step. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Dimensions and panel fit
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep. That 86 mm depth is the key dimension for enclosure depth planning — it determines gland-plate clearance and whether the breaker fits a shallow 200 mm deep panel without a sub-panel extension. Width and height are standard for a 250 A frame in the 3VA2 family; the 105 mm width occupies three 35 mm DIN positions if mounted on a DIN rail adapter, though the 3VA2 is typically bolted directly to a mounting plate for high-fault applications.
Breaking capacity by voltage
Interrupting capacity varies sharply with system voltage: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V. For a site electrical engineer coordinating selectivity, the 690 V figure is the constraint — if the panel's available fault current exceeds 4.5 kA at 690 V, this breaker cannot clear a bolted fault at that voltage. At 480 V (common in North American industrial systems), the 500 V rating of 121 kA provides substantial headroom for most service-entrance applications.
Integrated functions and accessories
This variant includes a shunt trip (STL) for remote opening, two auxiliary switches plus a trip alarm switch for status indication, a voltage-trip indicator, and communication capability. It does not include undervoltage release or ground-fault monitoring. The base switch is order code 3VA2225-6KP32-0AA0. For a controls integrator, the communication function and auxiliary contacts allow the breaker to report its state to a PLC or SCADA system without an external interposing relay.