What this MCCB carries
The Siemens SENTRON 3VA1025-3ED32-0DH0 is a 3-pole molded case circuit breaker rated for 25 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release. It's built for line protection — no voltage trip, no ground-fault monitoring, no comms module. The interrupting ratings climb to 75.6 kA at 240 V AC and 52.5 kA at 415 V AC, dropping to 7.5 kA at 690 V AC. That spread tells you this breaker is sized for high-fault commercial and light-industrial panels where the available fault current is substantial at lower voltages.
Thermal derating and real-world fit
The 25 A rating holds flat through 50 °C — useful if the breaker sits in a warm enclosure near other heat sources. Above that it steps down: 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 pushes past 50 °C, you're looking at a 2.5 A derate at the top end. The 70 mm depth and 76.2 mm width fit a standard 3-pole MCCB footprint on DIN rail or a mounting plate, so it swaps into existing SENTRON cutouts without re-drilling.
Auxiliary and undervoltage release
This variant ships with an undervoltage release (UVR) and a 2-auxiliary-switch-plus-1-trip-alarm-switch HQ auxiliary contact block. The UVR drops the breaker if control voltage falls below the dropout threshold — standard for safety circuits that need to kill power on loss of undervoltage supervision. The trip alarm contact gives a separate signal when the breaker trips on fault, which is handy for a remote status lamp or PLC input without wiring through the aux switches.