The Siemens 3VA1220-5EF42-0KH0 is a SENTRON molded case circuit breaker (MCCB) rated for 200 A continuous current in a 4-pole configuration, with a TM240 thermal-magnetic overcurrent release and a 187 kA interrupting capacity at 240 V. This is a line-protection version — meaning it is sized for feeder and main distribution duty, not motor-starting or generator applications where a different trip curve would be needed. The 200 A rating holds flat from 40 °C up to 50 °C, then derates to 176 A at 70 °C; that thermal stability matters when the breaker sits in a crowded panel where ambient climbs above the standard 40 °C reference point.
The interrupting rating drops with system voltage, as you would expect for an MCCB: 187 kA at 240 V, 121 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V. For a 415 V distribution board — common in European industrial plants — that 121 kA figure gives substantial headroom above typical transformer-fed fault levels (usually 25–50 kA), so selectivity with downstream breakers is achievable without oversizing the main. At 690 V the 17 kA rating still covers most motor-control-center faults, but verify your worst-case bolted-fault calculation if the transformer is close-coupled.
Auxiliary contacts and shunt trip
The shunt trip is ordered separately as 3VA9688-0BL33. If your control scheme needs undervoltage release or ground-fault monitoring, note that this variant carries neither — those would require a different order-code suffix.
Physical footprint
Dimensions are 158 mm height, 140 mm width, 70 mm depth. The 140 mm width is the standard 4-pole MCCB form factor for this SENTRON series, so it will fit the same mounting cutout and busbar spacing as other 4-pole 3VA breakers. Panel depth of at least 100 mm is advisable to allow clearance for the rear arc-chamber venting and wiring bends.