What the ratings mean for your panel
The Siemens SENTRON 3VA1125-6EE46-0AA0 is a 4-pole molded case circuit breaker rated for 25 A continuous current at 40 °C, with a TM220 thermal-magnetic release. The headline number here is the interrupting capacity: 220 kA at 240 V AC, 154 kA at 415 V, and 121 kA at 440 V — that is a high-interrupting rating for a 25 A frame, meaning it can safely clear severe fault currents without upstream coordination issues in a distribution panel. At 500 V and 690 V the rating drops to 17 kA, which still covers most industrial motor branch circuits. The 70 mm depth and 101.6 mm width fit standard panel-mount cutouts; the IP40 front protection keeps dust out of the enclosure face.
Integration notes for the panel builder
Mounts in a standard panel cutout; the 70 mm depth leaves clearance for rear-access wiring. The TM220 release is fixed — no interchangeable trip units on this variant, so verify the 25 A rating matches your branch circuit before committing the panel layout. Power loss is 8.5 W maximum, negligible for thermal budgeting in a ventilated enclosure. Operating temperature range spans -40 °C to 70 °C, storage from -40 °C to 80 °C, so it handles unheated warehouses or rooftop enclosures.