The Schneider Electric TeSys WB1HA750 is a contactor coil — a low-consumption AC/DC operated coil rated for 250 V DC control voltage, designed to mount on CV1B and CV3B TeSys contactor frames. This is a service-part category item (18402-WORLD SERVICE PARTS(CONTROL ACCESS)), meaning it was stocked as a field-replaceable component for installed contactors, not a new-build production part.
The 250 V DC control circuit voltage is the coil's rated operating voltage — apply this DC level across the coil terminals to pull in the contactor armature. The AC/DC control circuit type means the coil accepts either AC or DC supply, but the 250 V DC rating is the specific value on this variant. Low-consumption coil type indicates reduced holding power draw compared to standard coils, which matters for control transformers with limited VA capacity or for applications where coil thermal rise is a concern inside a sealed panel.