LiftMaster K41-0383-000 Transformer 1200Lb/120VAC-240VAC

The LiftMaster K41-0383-000 is an OEM replacement transformer designed for select LiftMaster operators, delivering dependable low-voltage power to control boards and accessories. Engineered for dual-line input, it supports 120–240 VAC mains, making it suitable for residential and commercial installations where service voltage may vary. As a genuine LiftMaster part, it restores proper power regulation in compatible gate operators and commercial door openers when the original transformer has failed or degraded, helping resolve issues such as intermittent operation, blown low-voltage fuses, or non-responsive controls.

Use this transformer only in models that specifically call for part number K41-0383-000 in their parts list or service manual, and wire it exactly per the LiftMaster schematic for your operator. Installation should be performed by a qualified technician with power disconnected, confirming the correct primary input selection (120 or 240 VAC) and verifying secondary connections to the control circuitry. This replacement part is intended for enclosed operator environments and typical overhead door and gate operator applications. For best results, reference the official LiftMaster documentation for your unit to confirm compatibility and wiring details.