The Siemens SENTRON 3VA1220-5EF42-0BH0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 200 A at 40 °C ambient without derating. The breaking capacity reaches 187 kA at 240 V AC and 121 kA at 415 V AC — figures that cover most industrial distribution fault levels.
Current derating and thermal budget
The breaker holds 200 A from 40 °C through 50 °C ambient; above that it derates linearly to 176 A at 70 °C. Maximum power loss is 44.5 W — a figure that matters for enclosure heat rise when multiple breakers share a panel. The operating range spans -25 °C to +70 °C, with storage from -40 °C to +80 °C. Mounting dimensions are 158 mm height × 140 mm width × 70 mm depth, fitting standard SENTRON panel cutouts.
