What this MCCB carries and where it fits
The Siemens 3VA1220-6EF42-0KH0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection in distribution panels. Its 200 A continuous current at 40 °C and 220 kA interrupting capacity at 240 V mean it handles high-fault service-entrance or feeder duty without cascading upstream — the SCCR headroom is the spec that governs selectivity coordination in a tiered panel. Four poles suit three-phase plus neutral or dual-feed configurations. The 800 V rated insulation voltage covers 480 V and 600 V class systems with margin. Panel integration: the 70 mm depth and 140 mm width fit standard MCCB mounting footprints — verify the existing bus-bar drill pattern against the 158 mm height before committing the gland plate.
Breaking capacity across voltage classes
The interrupting rating drops with system voltage as expected: 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. For a 480 V panel the relevant figure is the 440 V or 500 V entry — the 75.6 kA at 440 V is the conservative reference for 480 V class applications.
Thermal derating and auxiliary configuration
Rated current holds at 200 A from 40 °C through 50 °C (–), then derates linearly: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, 176 A at 70 °C. The maximum power loss is 42 W. Operating ambient range is -25 °C to 70 °C (–); storage range is -40 °C to 80 °C (–). Shipped with a shunt trip release (STL) and two auxiliary switches plus one trip alarm switch HQ. The trip indicator and voltage trigger are present. No undervoltage release, no ground-fault monitoring, no communication function.