The Siemens SENTRON 3VA2025-6JQ36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 25 A continuous current, with an adjustable thermal-magnetic trip unit covering 38 A minimum to 300 A maximum. That trip range means one breaker body covers a wide spread of branch-circuit loads — from a small motor feeder up to a 300 A bus tap — without swapping the trip pack. Breaking capacity is the headline here: 242 kA at 240 V, dropping to 187 kA at 415 V and 440 V, then 121 kA at 500 V, and 3 kA at 690 V. At 240 V that's a very high interrupt rating — it'll clear a fault on a large transformer secondary or a utility-service entrance without the arc chute struggling. At 690 V the 3 kA figure is modest; this is not the breaker for a 690 V motor center with high available fault current. Derating is flat across the board: 25 A at 40 °C, 45 °C, 50 °C, 55 °C, 60 °C, 65 °C, and 70 °C. No thermal knock-down as the panel warms up — useful in a sealed enclosure or a hot machine bay where other breakers would start to trip early.
If you need shunt-trip or UVR capability, you'd add the accessory later — the 3VA platform supports field-installable trip modules.