The Siemens SENTRON 3VA1220-4EF42-0AB0 is a 4-pole molded case circuit breaker (MCCB) rated 200 A continuous at 40 °C, with a TM240 thermal-magnetic overcurrent release. It delivers 121 kA breaking capacity at 240 V, derating to 75.6 kA at 415 V and 52.5 kA at 440 V — numbers that govern fault-clearing capability across common distribution voltages. The 800 V rated insulation voltage means it's built for 690 V line-to-line systems with margin. Current rating holds flat at 200 A through 50 °C, then derates linearly to 176 A at 70 °C (–). That matters for panel builders: if the breaker sits in a hot enclosure near other dissipating gear, the 50 °C threshold is the design limit before you lose headroom. The TM240 release is a fixed thermal-magnetic trip — no electronic adjustments, no communication module, no ground-fault monitoring built in. This is a line-protection design — meaning it's intended for feeder and main breaker duty, not motor branch circuit protection where a motor-circuit protector or combination starter would be the right call. The 42 W maximum power loss is a heat budget number for enclosure thermal calculations.
Integration & Mounting
Dimensions are 140 mm wide, 158 mm high, 70 mm deep — a standard SENTRON 3VA footprint for 4-pole frames in this current class. It ships with two auxiliary switches (HP design) pre-installed, which simplifies BOM consolidation: no separate aux switch order needed for status feedback to a PLC or indication lamp. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C.