The Siemens 3VA1220-4EF32-0CA0 is a 3-pole SENTRON molded case circuit breaker rated for 200 A continuous current (Iu) at 40 °C, with an 800 V insulation voltage (Ui). The interrupting ratings climb to 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V, so it handles high-fault utility feeds and transformer secondaries without cascading upstream.
Above that it derates: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, 176 A at 70 °C.
The undervoltage release is a factory-integrated option (order code suffix indicates the UVR is built in, not a field-addon kit). No official successor or phase-out notice is on record.
The 105 mm width occupies three 35 mm module spaces; the 70 mm depth leaves room for rear busbar connections in a typical 200 mm deep enclosure. The front IP40 rating means it is not suitable for washdown areas — keep it inside a sealed cabinet. The TM240 release is fixed-trip (thermal-magnetic, not electronic), so coordination studies rely on the published time-current curve for the 3VA platform.