The 3VA1220-4EF42-0BC0 is a SENTRON molded case circuit breaker rated for 200 A continuous current (Iu) across ambient temperatures up to 50 °C — at 55 °C it derates to 194 A, at 70 °C to 176 A, so the full 200 A is available in most ventilated enclosures. The 4-pole construction with TM240 thermal-magnetic overcurrent release handles line protection (not feeder or motor protection; no phase-failure detection, no ground-fault monitoring). Breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, and 25 kA at 440 V — enough for high-fault utility feeds or transformer secondaries.
Front IP40 protection means it is suitable for dry indoor enclosures; no washdown rating. The 2 HQ auxiliary switches provide status feedback for PLC or SCADA inputs. The undervoltage release trips the breaker when supply drops below a threshold, preventing automatic restart after a brownout — useful for conveyor or pump circuits where uncontrolled restart is a safety concern.
Comparison with 3VA1010-2ED32-0JA0
The 3VA1010-2ED32-0JA0 is a lower-rated sibling in the same SENTRON 3VA family — typically 100 A frame versus this 200 A frame. The 3VA1220-4EF42-0BC0 carries higher interrupting capacity at every voltage point and includes the undervoltage release as standard; the 3VA1010-2ED32-0JA0 may omit the UVR and have fewer auxiliary contacts. Physically, the 3VA1220-4EF42-0BC0 is wider (140 mm vs. the 100 A frame's 105 mm) so a panel cutout for the smaller breaker will need modification to accept this one. If the BOM specifies the 3VA1010-2ED32-0JA0, this 200 A unit will not drop in without rewiring and re-cutting the mounting plate.