What this 200 A MCCB is and where it lands
The Siemens SENTRON 3VA1220-5MH32-0JC0 is a 3-pole molded case circuit breaker rated 200 A continuous, built for starter protection duty — meaning it is sized to sit ahead of a motor starter or contactor in a panel, providing short-circuit and overload backup for the downstream switching device. The 200 A frame carries the same rating from 40 °C through 50 °C (cites:,), then derates linearly to 176 A at 70 °C (cites:,), so the thermal curve matters if the panel ambient runs hot. Interrupting capacity reaches 187 kA at 240 V (cite:), 121 kA at 415 V (cite:), and 75.6 kA at 440 V (cite:) — numbers that govern whether this breaker coordinates with upstream gear or needs a current-limiting upstream device. The 800 V rated insulation voltage (cite:) covers 480 V and 600 V class systems with margin.
Breaking capacity — what the numbers mean for coordination
The 187 kA at 240 V (cite:) is the highest short-circuit current this breaker can safely interrupt at that voltage — typical for a service-entrance or large-feeder location on a 240 V delta system. At 415 V the rating drops to 121 kA (cite:), at 440 V to 75.6 kA (cite:), at 500 V to 30 kA (cite:), and at 690 V to 4.5 kA (cite:). The steep roll-off above 500 V means this frame is not a 690 V main breaker for high-fault installations; at 690 V it is effectively a disconnect with modest fault handling. For a 480 V panel with available fault current under 75 kA, the 440 V rating is the relevant column — 75.6 kA gives headroom for most industrial distributions.
Panel fit and auxiliary configuration
The breaker measures 70 mm deep, 105 mm wide, 158 mm tall (cites:,) — a standard 3-pole MCCB footprint that mounts on a DIN rail or panel-mount adapter in the SENTRON family. It ships with two HQ auxiliary switches (cite:) and a shunt trip release (STL) (cite:), so the panel builder gets remote trip and status feedback without ordering separate accessory kits. The shunt trip allows a safety circuit or emergency-stop relay to open the breaker electrically, which is typical for starter-protection schemes where a downstream contactor failure must be isolated by the upstream MCCB.