SENTRON 3VA1112-6FF46-0AA0 — 125 A MCCB with TM240 Release
It is a line-protection device, not a motor-protection or ground-fault variant — the TM240 release is sized for feeder and distribution duty where the full-load current is close to the frame rating. Interrupting capacity varies sharply with system voltage: 220 kA at 240 V, 154 kA at 415 V, 76 kA at 440 V, and 17 kA at 500 V and 690 V. At 415 V — a common industrial distribution level — the 154 kA rating covers most utility-transformer-fed fault currents without requiring current-limiting fuses upstream. Thermal derating is mild up to 50 °C (full 125 A), then drops to 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. For a panel with ambient near 60 °C, the effective continuous current is 120 A — a 4% reduction that rarely forces a frame upsizing, but worth confirming if the load is already at 125 A.
IP40 front protection.
Key Ratings and Release Design
Endurance is rated at 20,000 mechanical operations.