What the ratings mean for your panel
The Siemens SENTRON 3VA2225-6JQ32-0JH0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current Iu of 250 A, with an ETU560 electronic trip unit configured for line protection. The thermal derating curve is published: 250 A continuous up to 50 °C ambient, then 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. If the panel ambient runs above 50 °C, the breaker must be down-rated accordingly — a common oversight in sealed enclosures. The maximum power loss of 48 W at rated load should be factored into the enclosure thermal calculation. The auxiliary contact configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ type), and the breaker includes a shunt trip (STL) release for remote tripping. A communication function is present, and the ground fault monitoring uses summation current formation on the L-conductor. The basic switch is order code 3VA2225-6JQ32-0AA0, and the integrated auxiliary trip is 3VA9688-0BL32.
Panel integration notes
The breaker footprint is 105 mm wide, 181 mm tall, and 86 mm deep. It mounts on a DIN rail or can be screw-fixed to a backplate. The 3-pole form factor with the ETU560 electronic trip unit means it draws power for the trip electronics from the line side — no separate control power needed for the trip unit itself, but the shunt trip (STL) requires an external voltage source to operate. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The latching endurance is rated at 20,000 operations.