The Siemens SENTRON 3VA1220-6EE42-0AA0 is a 4-pole molded case circuit breaker with a TM220 thermal-magnetic release, rated 200 A continuous at 40 °C. It's designed for line protection — not motor protection, not ground-fault monitoring. The TM220 release means the thermal element tracks overloads, the magnetic element handles short-circuit trips. This is a straightforward distribution breaker for a main or feeder panel where you need high interrupting capacity. Breaking capacity is the headline: 220 kA at 240 V AC, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. The 415 V rating of 154 kA still puts it in the top tier for industrial distribution boards. Thermal derating is published per degree: holds 200 A flat through 50 °C, then drops to 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. If your panel ambient runs 55 °C, you lose 6 A — plan the load accordingly. Maximum power loss is 42 W at rated current, which matters for enclosure heat calculations in a sealed cabinet.
Dimensions: 140 mm wide, 158 mm high, 70 mm deep. Four poles in a single case; the fourth pole is the switched neutral on a 3-phase + N system. No auxiliary contacts or shunt trip included as standard — those are separate add-on modules that clip onto the left side of the breaker.