What the ratings mean for your panel
The 3VA1220-5EF42-0BC0 is a Siemens SENTRON molded case circuit breaker (MCCB) rated for line protection — the main feeder or large branch in a distribution panel. Its 200 A rated continuous current (Iu) holds flat from 40 °C to 50 °C, then derates to 176 A at 70 °C, so the thermal curve is stable across most switchroom ambient conditions without oversizing. The 4-pole construction handles three-phase-plus-neutral systems, and the TM240 overcurrent release provides fixed thermal-magnetic protection — no electronic adjustment, but no programming either. The 187 kA interrupting rating at 240 V and 121 kA at 415 V give serious fault-current headroom for industrial mains; at 690 V it still clears 17 kA, which covers most motor-drive line-side applications. The front face carries IP40 protection — splash-proof in the panel, but not washdown-rated. An undervoltage release (UVR) is built in, so the breaker trips on loss of control voltage; the auxiliary contact version includes 2 HQ auxiliary switches for status feedback to a PLC or annunciator. The integrated auxiliary trip accessory (3VA9608-0BB11) is already specified, so no separate order for shunt or UVR add-ons.
Panel fit and integration
The breaker measures 140 mm wide × 158 mm high × 70 mm deep — a standard 4-pole MCCB footprint for 200 A class. It mounts on a DIN rail or directly to a backplate via screw terminals. The IP40 front means the breaker face is protected against solid objects larger than 1 mm, but the enclosure itself must provide the overall panel IP rating. The undervoltage release and auxiliary contacts are wired at the factory; no field assembly of trip units is required.