The LV839492 is a pre-wired terminal block for Schneider Electric MasterPact MTZ2 and MTZ3 drawout circuit breakers. It integrates the PTE, SDE2/RES, M2C/ESM, and eight OF auxiliary contact signals into a single 3-wire chassis block — the wiring interface between the breaker cradle and the panel's control wiring.
What It Connects
This block mounts to the chassis of a MasterPact MTZ2 or MTZ3 drawout cradle. The 3-wire design bundles the trip-unit communication (PTE), the spring-charged-motor / remote-reset circuit (SDE2/RES), the M2C/ESM energy-management module interface, and eight form-C OF auxiliary contacts into one connectorized assembly. It eliminates point-to-point wiring between the cradle and the terminal strip — the entire control interface comes out as a single pluggable block.
Fit Note for the Drawout Cradle
The block is specific to the drawout mounting mode — it does not fit fixed-mount MasterPact units. If the panel uses an MTZ2 or MTZ3 drawout cradle and the existing block is damaged or missing, this is the factory-matching replacement. No wiring diagram changes, no terminal re-mapping.