The Siemens SENTRON 3VA1220-4GF42-0KH0 is a 4-pole molded case circuit breaker (MCCB) rated at 200 A continuous, designed for line protection in distribution panels. Its interrupting capacity hits 121 kA at 240 V AC and 75.6 kA at 415 V AC — numbers that tell you it can handle high-fault utility feeds or transformer secondaries without needing a current-limiting fuse upstream.
The 200 A rating holds flat from 40 °C to 50 °C ambient, then derates linearly to 176 A at 70 °C. The breaker carries 800 V rated insulation voltage, so it's comfortable on 480 V or 600 V systems with margin. Interrupting capacity drops with system voltage: 52.5 kA at 440 V, 17 kA at 500 V, 11.9 kA at 690 V. For a 480 V panel, the 52.5 kA figure is the one that governs your SCCR coordination study.
The case measures 158 mm high, 140 mm wide, 70 mm deep — a 4-pole footprint that fits standard SENTRON mounting bases. Panel builders: the 70 mm depth leaves room behind the escutcheon for wiring gutters. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.