The LV839487 is a pre-wired terminal block for MasterPact MTZ2 and MasterPact MTZ3 drawout circuit breakers. It carries three wires plus a PTE+M2C/ESM module and four OF auxiliary contacts, all pre-terminated into a single chassis block that mates with the breaker cradle.
What this part does in the panel
This terminal block sits in the drawout chassis of a MasterPact MTZ2 or MTZ3 breaker. It provides the fixed-side wiring interface for the breaker's control circuits: the three power wires, the PTE (push-to-trip) and M2C/ESM (Micrologic control / energy-sensor module) connections, plus four OF (open/closed) auxiliary contacts that signal breaker position to the control system. Drawout mounting means the breaker slides into the cradle and the terminal block stays fixed to the chassis. When the breaker is racked out, the block remains wired to the panel — no need to disconnect control wiring for maintenance or swap-out.