Siemens 3VA1125-4GD46-0AA0 — SENTRON 4-Pole MCCB, 25 A, TM210 Trip
Breaking capacity varies sharply with line voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. Thermal derating is minimal up to 50 °C (full 25 A), then drops to 24 A at 55–60 °C and 23 A at 65–70 °C. In a warm enclosure, plan for that 2 A reduction rather than relying on the 25 A nameplate. Footprint is 130 mm high, 101.6 mm wide, 70 mm deep — a standard 4-pole MCCB form factor that fits most DIN-rail or panel-mount enclosures without surprises.