Thermal derating — what the curve means for your panel
The 3VA1220-5GF42-0HC0: This breaker holds its full 200 A rating up to 50 °C ambient. Above that, it derates linearly: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. If your panel runs hot — say, near a furnace line or in a crowded enclosure — you need to account for that drop. The operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Dimensions and panel fit
The 3VA1220-5GF42-0HC0 measures 70 mm deep, 140 mm wide, and 158 mm high. That's a compact footprint for a 200 A, 4-pole MCCB — it fits standard SENTRON mounting patterns. The supplied basic switch is order code 3VA12205GF420AA0. It comes with two HQ auxiliary switches and a shunt trip (STL) release; no undervoltage release, no ground-fault monitoring, no communication function. Trip indicator is not fitted.