The Siemens SENTRON 3VA1220-5MH32-0JA0 is a 3-pole molded case circuit breaker rated 200 A continuous, with a shunt trip release (STL) for remote tripping. It's designed for starter protection — meaning it's built to handle motor-starting inrush without nuisance tripping, while still clearing faults. The interrupting rating hits 187 kA at 240 V, dropping to 121 kA at 415 V and 75.6 kA at 440 V — enough for high-fault panels. The insulation voltage is rated 800 V, so it can sit on 690 V systems with headroom.
Ratings and derating
Full 200 A rating holds from 40 °C up to 50 °C. At 55 °C it derates to 194 A, then 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. That's a straight thermal derating curve — no surprises if the panel runs hot. Maximum power loss is 42 W at rated load.
Mounting and integration
Three-pole frame, 105 mm wide, 158 mm tall, 70 mm deep. Bolts into a standard panel — no DIN-rail clip on this one, it's screw-mount. The shunt trip release (STL) is factory-installed; verify the coil voltage matches your control circuit before wiring. The overcurrent release is a TM120M thermal-magnetic type, so it's fixed-trip — no interchangeable rating plugs.