LiftMaster K20-1100C-2TP Motor, 1 HP, 115/230V, 1 Phase, CF, TEFC
The LiftMaster K20-1100C-2TP is a 1 HP, 115/230V, single-phase commercial replacement motor with C-face mounting and TEFC construction. It is used on select LiftMaster commercial and industrial-duty door operator systems where the motor must handle heavier doors, higher cycling, or tougher environments than a light-duty residential opener. The TEFC enclosure is an important part of the specification because many NEMA 4 and NEMA 12 commercial operator installations are exposed to washdown areas, dust, moisture, or more demanding jobsite conditions. This motor is selected by exact operator parts diagram and motor nameplate. A 1 HP rating alone does not confirm fit. LiftMaster has different 1 HP motors for single-phase, three-phase, TEFC, non-TEFC, gear-reduced, gate, and fire-door applications, and suffixes such as -2TP and -2P should not be ignored.
Compatible With / Common Applications
- Select LiftMaster 1 HP, 115/230V, single-phase commercial door operators requiring a C-face TEFC motor.
- Commonly associated with LiftMaster J and H series industrial-duty jackshaft and hoist operator applications when the parts diagram lists K20-1100C-2TP.
- Commonly associated with T and GT series trolley / heavy-duty trolley operator applications when the parts diagram lists this motor.
- Commonly associated with GH series gearhead operator applications and GH1011/GH1021 style references when the diagram confirms this motor family.
- Used on select NEMA 4 and NEMA 12 rated industrial operator configurations.
- Not a direct substitute for K20-1100C-2P, K20-3100C-4T, or other 1 HP motors with different phase or enclosure requirements.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Commercial operator replacement motor |
| Part Number | K20-1100C-2TP |
| Horsepower | 1 HP |
| Voltage | 115/230V AC |
| Phase | 1 phase |
| Mounting | C-face / CF |
| Enclosure Type | TEFC |
| Application | Select industrial-duty commercial door operators |
| Compatible Operator Type | Select J, H, T, GT, and GH commercial operator configurations by parts diagram |
| Environment Notes | Commonly associated with NEMA 4 / NEMA 12 style operator applications |
Also Known As / Related Part Numbers
Technician Note
Do not drop the T suffix when comparing this part. K20-1100C-2TP and K20-1100C-2P are closely related part numbers, but the TEFC/enclosure requirement can be different for the operator application.
Before Ordering Checklist
- Confirm the old motor is 1 HP.
- Confirm 115/230V single-phase power.
- Confirm the operator calls for a C-face TEFC motor.
- Check whether the operator is a NEMA 4 or NEMA 12 rated unit that requires protected motor construction.
- Compare motor part number, frame, shaft, and wiring against the original motor before installation.
Professional Advisory
Commercial operator motors involve line voltage, moving mechanical parts, belts, chains, gear reducers, and door balance conditions. If the operator has tripped breakers, overheated, stalled, smoked, or moved the door unexpectedly, have a qualified commercial door technician inspect the system before returning it to service.
Product Questions & Answers
Both are 1 HP single-phase C-face motor listings, but the -2TP version identifies a TEFC-style motor. Do not substitute one for the other unless the parts diagram confirms it.
Which LiftMaster operator families commonly use this motor?
It is commonly associated with select J, H, T, GT, and GH commercial operator configurations when a 1 HP 115/230V single-phase TEFC motor is specified.
Can this be used on a 230/460V three-phase operator?
No. K20-1100C-2TP is a 115/230V single-phase motor, not a 230/460V three-phase motor.
Why is this motor used in tougher environments?
The TEFC construction is commonly specified where the motor needs better protection from dust, moisture, or harsh commercial conditions.
What should be checked if the previous motor overheated?
Check door balance, brake release, gear reducer condition, chain alignment, control wiring, and supply voltage before installing the new motor.
