Siemens 3VA1125-6EF32-0DA0 SENTRON MCCB, 25A, 3-Pole, 220kA

The 25 A rating holds flat from 40 °C up to 50 °C; it only starts to derate at 55 °C (24 A) and 65 °C (23 A). That means in a warm panel — say, one sitting next to a hot motor starter or a VFD — you still get full ampacity through most operating conditions. Breaking capacity drops as voltage climbs: 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V. If your service entrance is 480 V, you're working with the 121 kA figure — still plenty for most industrial mains, but worth checking against your available fault current. That UVR means if your control voltage dips or drops, the breaker opens automatically. Handy for machinery where you want a guaranteed stop on power loss, but be aware it adds a coil draw (around 11 W max power loss) that stays energized during normal operation.