SENTRON 3VM1220-5EE42-0AA0 — 200 A MCCB, 4-Pole, TM220
The Siemens SENTRON 3VM1220-5EE42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 200 A at 40 °C ambient. It uses a TM220 thermal-magnetic overcurrent release with an adjustable li (magnetic trip) up to 2,000 A. Breaking capacity is 187 kA at 240 V AC, 121 kA at 415 V, 76 kA at 440 V, and 30 kA at 500 V — enough headroom for most industrial fault-current scenarios without cascading upstream. Rated insulation voltage (Ui) is 690 V, and max DC operational voltage is 500 V, so it suits both AC and DC distribution panels.
Current rating vs. ambient temperature
The 200 A rating holds flat from 40 °C through 50 °C, then derates linearly to 176 A at 70 °C — useful when the breaker lives in a warm enclosure near other heat sources. Maximum power loss is 42 W, which factors into enclosure thermal calculations, especially in a multi-breaker lineup.
Mounting and environment
Dimensions are 140 mm wide × 158 mm high × 70 mm deep — a standard MCCB footprint for panel-mounting on a backplate or DIN rail adapter. Front face is IP40 rated, so it's protected against tools and small solids but not washdown — keep it inside the enclosure. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C — fine for most indoor industrial environments.