The LV848825 is a sensor plug for the MasterPact MTZ2 air circuit breaker fitted with a MicroLogic X control unit, rated at 3000 A. It's the part that feeds current measurement data from the breaker's main poles into the MicroLogic X trip unit — without it, the control unit has no line-current signal to act on.
This plug mounts directly into the MasterPact MTZ2 breaker frame. It's not a standalone sensor; it's the removable current-sensing interface between the breaker's power path and the MicroLogic X electronics. If you're swapping a MicroLogic X between frames or upgrading a breaker, this plug stays with the frame — order it when the original is lost, damaged, or the rating changes.