What this MCCB carries and what it means for your panel
The Siemens SENTRON 3VA1220-5EF42-0KA0 is a 4-pole molded case circuit breaker rated 200 A continuous at 40 °C through 50 °C, with a thermal-magnetic TM240 overcurrent release and an integrated shunt trip (STL) for remote tripping. Its breaking capacity reaches 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V — figures that tell you it can interrupt high-fault currents on the line side of a distribution panel without upstream coordination issues. The 800 V rated insulation voltage confirms it is built for 690 V industrial networks. The shunt trip release means a control signal — from an emergency-stop button, a relay, or a PLC — can open the breaker remotely, which is standard for safety circuits and remote shutdown schemes.
Thermal derating and real-world current
The breaker holds 200 A up to 50 °C ambient. Above that, it derates linearly: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C (–). If your panel enclosure runs hot — say, near a drive cabinet or in a non-ventilated space — size the load to the derated figure, not the 200 A nameplate. The maximum power loss of 42 W is the heat the breaker dumps into the enclosure; factor that into your thermal budget.
Physical fit and panel integration
Dimensions: 158 mm height, 140 mm width, 70 mm depth (–). That 70 mm depth is the projection from the mounting surface — important for gland-plate clearance or shallow enclosures. The 4-pole footprint matches standard SENTRON 3VA panel cutouts; no rewiring needed if you are replacing a 4-pole 3VA frame. The supplied basic switch order code is 3VA12205EF420AA0, which is the internal switching mechanism — useful for spare-parts ordering if the breaker is ever disassembled for maintenance.