SENTRON 3VA2 — 250 A motor protection MCCB
The interrupting ratings climb to 187 kA at 240 V and hold at 121 kA through 440 V, dropping to 75.6 kA at 500 V and 7.5 kA at 690 V; that curve tells you where the fault-current headroom lives for your service voltage.
You do not have to derate for a 65 °C panel ambient. The interrupting rating of 187 kA at 240 V is high for a 250 A frame; at 480/277 V systems the relevant number is the 121 kA at 440 V and 75.6 kA at 500 V. The 7.5 kA at 690 V is a reminder that the frame is not sized for 690 V industrial mains at high fault levels — it is a 600 V class device.
Motor protection and auxiliary wiring
This variant is explicitly a motor-protection design, with phase failure detection built in. A voltage trigger and trip indicator are present on the front face. The base switch order code is 3VA2325-5MN32-0AA0 — this -0HH0 suffix adds the shunt trip and auxiliary switch complement. Panel builders should account for the 138 mm width, 248 mm height, and 110 mm depth when laying out the DIN-rail or mounting-plate footprint.