LiftMaster XF208VAC12 208V Transformer Kit — Supported MAXUM 1200 Configurations

The LiftMaster XF208VAC12 is the 208V step-down transformer kit identified for supported MAXUM 1200 commercial-door operator configurations. The MAXUM wiring documentation describes a 208VAC-to-120VAC supply arrangement and requires selecting the transformer for the actual operator size. Some current accessory tables also list 2200 applications, while other revisions identify a separate XF208VAC22. Confirm the exact operator and current kit instructions before selection. This is an external supply-conversion accessory, not a battery charger, horsepower upgrade or universal transformer for every MAXUM voltage version.

Compatibility — Models, Versions and Exclusions

Match Supply Voltage, Operator Size and Manual Revision

The electrician should identify the available supply and the operator’s exact voltage configuration before selecting the transformer. A site voltage measurement is only one part of the decision; the correct kit also depends on operator size and current manufacturer instructions. Do not infer suitability from a similar enclosure, the word MAXUM or a transformer that happens to have a matching input voltage.

Check the current accessory table alongside the model-specific wiring diagram. Differences between published revisions should be resolved before installation, especially for 2200 configurations. Preserve the prescribed grounding, protection, mounting and conductor routing. The transformer does not change the operator’s mechanical rating or remove the need for its specified battery and safety arrangements. Qualified electrical installation and complete operational testing remain necessary.

Specifications and Product Identification

Before Ordering

• Record the full MAXUM operator model and supply version.
• Verify the actual incoming 208VAC supply and required output arrangement.
• Confirm the size-specific kit and resolve any 2200 revision difference.
• Plan approved mounting, protective components and wiring before installation.

Package Contents and Separate Requirements

This offer identifies the XF208VAC12 transformer kit. Confirm the current carton for enclosure, connection and mounting pieces, and use the supplied instructions to identify separately required site electrical materials. An operator, battery-backup kit, control board, branch circuit and safety sensors are not promised as included. The kit does not provide a complete conversion for an unspecified operator merely because the input and output voltage labels appear suitable.

Safety Warnings — Read Before Installation or Service

• WARNING: Transformer installation exposes hazardous AC voltage. Use qualified electrical and commercial-door personnel.
• Disconnect and secure all applicable power, including backup batteries where required, before installation or wiring changes.
• Follow the exact kit and operator diagrams. Do not improvise supply connections or use an unverified transformer size.
• Restore covers and test normal operation, limits, reversal and all required protection devices before returning the door to service.

Related Products and Important Differences

• DC7AH MAXUM battery-backup kit — a separate DC backup accessory for approved models; not a substitute for this AC transformer.
• TDC12X1BMC MAXUM trolley operator — a 1200-series operator to check against its own supply and accessory instructions; transformer inclusion is not assumed.

Frequently Asked Questions

Does this output 24V DC?

No. The documented step-down arrangement is 208VAC to 120VAC.

Will it fit every MAXUM operator?

No. Match operator size, supply version and current instructions.

Can it be selected for a 2200 model from an older listing alone?

No. Confirm the applicable revision because published tables also identify XF208VAC22.

Does it increase door capacity?

No. A supply transformer does not change the operator’s mechanical rating.

Need Help Confirming the Right Product?

Contact Garage-DoorParts.com before ordering. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.