Commissioning note — 3VA2220-7MS32-0HA0
The Siemens 3VA2220-7MS32-0HA0 is a SENTRON molded case circuit breaker (MCCB) in a starter protection design — meaning it's built to handle motor starting inrush without nuisance tripping while still providing short-circuit and overload protection for the branch circuit. Three poles, rated current holds flat at 200 A from 40 °C through 70 °C, so no derating needed in a warm panel. Trip range spans 600 A minimum to 3000 A maximum, adjustable via the internal trip unit. Shunt trip (STL) release is fitted as standard — energize the release coil to trip remotely, useful for emergency-stop integration or PLC-controlled shutdown sequences. No undervoltage release, no ground-fault monitoring, no auxiliary switch on this variant; those are separate order-code options if the application demands them.
SCCR and selectivity — voltage-dependent break capacity
Short-circuit breaking capacity varies sharply with line voltage — a critical detail for panel SCCR coordination. At 240 V the unit interrupts 330 kA; at 415 V and 440 V it still holds 242 kA. At 500 V that drops to 187 kA. At 690 V it falls to 5.2 kA — that's the weak point: if your system runs 690 V, this breaker is not your main, only a downstream device with limited fault current available. The 200 A continuous rating at 40–70 °C means it can carry a full motor FLA of 200 A without thermal derating across a wide ambient range. Power loss maxes at 46 W — factor that into enclosure heat dissipation calculations.
Panel fit — dimensions and mounting
Dimensions: 181 mm high, 105 mm wide, 86 mm deep. Width of 105 mm (4.13 in) fits a standard 3-pole MCCB cutout in most distribution panels. Depth of 86 mm (3.39 in) leaves clearance for rear-connected bus bars or cable lugs. Mounting is screw-clamp to the back panel or DIN-rail adapter — the SENTRON 3VA2 family uses a common footprint, so if you're swapping a failed 3VA2 breaker of similar frame, the bolt pattern and bus connection spacing match.