What the ratings mean for your panel
The 3VA1125-6EF32-0JH0 is a 3-pole SENTRON molded case circuit breaker rated for 25 A continuous current at 40 °C ambient, with the TM240 thermal-magnetic release tuned to that trip curve. The 220 kA breaking capacity at 240 V is the interrupting rating you coordinate against — it tells you this MCCB can clear a fault up to that level without upstream fuses or breakers needing to open first. At 415 V the breaking capacity is 154 kA, at 440 V it's 121 kA, and at 690 V it drops to 17 kA, so the voltage class of your distribution determines which figure governs your SCCR calculation. This is a line-protection version (not a motor-protection or generator version), so the TM240 release is set for feeder or branch-circuit protection where the load is resistive or a mix of general loads. The shunt trip (STL) auxiliary release lets you remotely trip the breaker via a control signal — useful for emergency-stop circuits or remote disconnect. The auxiliary contact block carries two auxiliary switches plus one trip alarm switch (HQ designation), giving you status feedback for your PLC or annunciator.
Panel fit and mounting
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep. The 76.2 mm width is a standard 3-pole MCCB footprint for DIN-rail or screw-mount panels — it occupies three 25.4 mm pole spaces. Depth of 70 mm means it clears most standard enclosure gland plates and backpan depths without interference. IP40 on the front means it's protected against tools and wires >1 mm, but not against water ingress — keep it inside a rated enclosure. Rated continuous current holds at 25 A from 40 °C through 50 °C, then derates to 24 A at 55 °C, 23.5 A at 60 °C, 23 A at 65 °C, and 22.5 A at 70 °C. If your panel ambient runs above 50 °C, you need to account for that derating in your load calculation. The operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C.