LiftMaster SD503L5L Commercial Overhead Door Opener
| HP: 1/2 | Volts: 208/230/460 |
| 3 Phase | 60Hz |
SD-style operators have functionality that is similar to T-style operators, but they are used on single and bi-parting sliding doors. These operators are directly attached to drive and control the door. SD operators are mounted directly above the door.