Liftmaster K20-1050B-2P Motor for BG790, SL575GL - 1/2HP

1/2HP Motor Replacement for LiftMaster BG790 & SL575GL Operators

The LiftMaster K20-1050B-2P is a genuine 1/2HP motor replacement kit designed for 115V/230V single-phase commercial barrier and slide gate operators. Built to OEM specifications, this motor is compatible with the BG790 barrier gate and legacy SL575GL heavy-duty slide gate operators using Logic 3.0 or 4.0 control boards. Engineered for continuous-duty use, this unit ensures consistent performance in moderate-traffic commercial environments.

Also known as: 20-1050B-2P, K20-1050B2, 20-1050B-2, K20-1033B-2, 20-1033B-2P, 201050B2, 123D122, 123D121, G2010331, 201033B2, 20-1033-1, K20-1033B2.

Key Features

• 1/2HP motor – Supports standard-duty gate and barrier operation
• 115V/230V single-phase – Flexible voltage for commercial installs
• Compatible with Logic 3.0 and 4.0 – Designed for legacy controller systems
• For BG790 and SL575GL operators – Direct OEM replacement for both barrier and slide units
• Continuous-duty rated – Built to perform in high-cycle, standard-duty applications
• LiftMaster OEM quality – Ensures proper fit and long-term reliability

Technical Specifications

• Part Number: K20-1050B-2P
• Horsepower: 1/2 HP
• Voltage: 115V / 230V
• Phase: Single-phase (1PH)
• Mounting Type: BM (Base Mount)
• Motor Type: Standard-duty
• Compatibility: Barrier Gates: LiftMaster BG790 Slide Gates: SL575GL (Logic 3.0 & 4.0)
• Included: Motor only (mounting hardware sold separately)

Conclusion

The LiftMaster K20-1050B-2P replacement motor restores reliable function to BG790 barrier gates and Logic 3.0/4.0-based SL575GL slide gate operators. With flexible voltage input and OEM-grade design, it’s the go-to solution for keeping standard-duty LiftMaster systems running at peak performance.