The Siemens SENTRON 3VA1025-4ED32-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for 25 A continuous current at 40 °C, with a TM210 thermal-magnetic release that handles overloads and short circuits without external power. Its interrupting ratings are 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — so it clears high-fault conditions across common low-voltage distribution voltages without cascading upstream.
Above that, it derates: 24 A at 55 °C, 23.5 A at 60 °C, 23 A at 65 °C, and 22.5 A at 70 °C.
Built-in undervoltage release — what that means for your circuit
That means if supply voltage drops below the release threshold, the breaker trips automatically. Good for motor branch circuits where you want a guaranteed drop-out on brownout, or for safety disconnects that must open on loss of control power. There's no auxiliary contact, no communication module, no phase-failure detection built in — it's a straightforward line-protection breaker with UVR.