What this 200 A SENTRON MCCB delivers
The Siemens 3VA1220-4EF42-0DA0 is a 4-pole molded case circuit breaker from the SENTRON family, rated for 200 A continuous current and carrying a TM240 thermal-magnetic overcurrent release. Its breaking capacity hits 121 kA at 240 V AC and 75.6 kA at 415 V AC — figures that cover most industrial distribution and motor branch circuits without needing an upstream current-limiting fuse. The integrated undervoltage release (UVR) trips the breaker when control voltage drops, which is standard for safety disconnects in machine-tool and conveyor panels.
Thermal derating and real-world current
Rated continuous current Iu is 200 A, and it holds that rating from 40 °C through 50 °C ambient. Above that, derating kicks in: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. If your panel ambient runs hot — say, a sealed enclosure near a furnace line — factor that 176 A floor at 70 °C. The TM240 release is thermal-magnetic, so the thermal element tracks ambient; no separate adjustment needed.
Breaking capacity across voltage levels
This MCCB's interrupting rating varies sharply with system voltage: 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V. At 415 V — common in European industrial grids — 75.6 kA is well above typical fault levels for a 200 A feeder. At 690 V, the 11.9 kA rating still covers most motor branch circuits, but verify against your transformer's short-circuit capacity if you're feeding a 690 V drive panel.
Physical fit and panel integration
Dimensions: 158 mm tall, 140 mm wide, 70 mm deep. It's a standard SENTRON 3VA frame size for 200 A, 4-pole — mounts on a DIN rail or direct panel via the rear slots. The 70 mm depth means it clears most 200 mm deep enclosures with room for wiring gutters. IP40 on the front face; no auxiliary contacts or communication module on this variant, so any remote status indication needs an external interface.