What this MCCB delivers for a motor branch
The Siemens SENTRON 3VA2220-7MS32-0DH0 is a 3-pole molded case circuit breaker designed specifically for starter protection — meaning it's built to handle the high inrush and repetitive switching of motor loads in a control panel. It carries 200 A continuously across the full 40 °C to 70 °C ambient range, so no derating curve to chase when the panel runs warm. The adjustable trip range from 600 A to 3000 A lets you set the magnetic pickup to match the motor's locked-rotor current without swapping the breaker frame.
Interrupting capacity — what the voltage tiers tell you
This breaker delivers 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 5.2 kA at 690 V. The steep drop at 690 V is typical for a compact MCCB frame — the arc extinction physics limit the gap it can clear at higher voltage. For a 480 V motor branch, the 242 kA rating at 440 V gives ample SCCR headroom for most industrial panels; at 690 V, coordinate with upstream fuses or a larger frame if the available fault current exceeds 5.2 kA.
Panel fit and wiring
The 3VA2220-7MS32-0DH0 occupies 105 mm width, 181 mm height, and 86 mm depth — a 4.13 by 7.13 by 3.39 inch footprint that fits standard MCCB panel cutouts. It ships with an undervoltage release (UVR) pre-installed and a 2-auxiliary-switch + 1 trip-alarm-switch block, so you don't need to order separate accessories for basic status feedback. Maximum power loss is 46 W at rated load — account for that in the enclosure thermal budget.