Siemens SENTRON 3VA1025-4ED32-0DH0 — MCCB for Line Protection
It carries a 121 kA breaking capacity at 240 V AC, stepping down to 75.6 kA at 415 V and 52.5 kA at 440 V — figures that govern its fault-clearing capability in low-voltage switchgear.
Breaking Capacity and Selectivity Coordination
At 415 V the rating drops to 75.6 kA, and at 690 V it holds at 11.9 kA. For selectivity coordination downstream, the 25 A frame (3VA1) allows cascading with smaller branch breakers; the undervoltage release provides a shunt-trip function for emergency-off or undervoltage protection schemes.
Rated current holds at 25 A from 40 °C through 50 °C, then derates to 24 A at 55–60 °C and 23 A at 65–70 °C. The 70 mm depth, 76.2 mm width, and 130 mm height fit standard Siemens SENTRON 3VA1 panel cutouts and busbar spacing.