SENTRON 3VA1220-5MH32-0DH0 — 200 A MCCB with undervoltage release
The interrupting rating drops as voltage rises: 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 4.5 kA at 690 V. That 690 V figure is the one to check if you're feeding a 690 V drive bus — it's still adequate for most motor branch circuits, but verify your available fault current. Thermal derating is mild through 50 °C (full 200 A), then steps down: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, 176 A at 70 °C. If the panel ambient runs hot, the 176 A floor at 70 °C still leaves headroom for a 150 A continuous load.
Panel fit and auxiliary releases
The 3VA1220-5MH32-0DH0 measures 105 mm wide × 158 mm high × 70 mm deep — a standard SENTRON 3VA footprint for 200 A frames. It mounts on a DIN rail or can be screw-fixed to a backplate; the 70 mm depth keeps the front projection within typical 200 mm deep enclosures. This variant ships with an undervoltage release (UVR) and a 2-auxiliary-switch + 1 trip-alarm-switch HQ configuration. The UVR is wired to the control voltage; if that drops, the breaker trips — common for emergency-stop chains or safety circuits that need a loss-of-voltage trip. The auxiliary switches give status feedback to a PLC or HMI. Power loss at full load is 44.5 W maximum. That's the heat you need to vent from the enclosure — not trivial in a sealed panel, so factor it into your thermal budget.