LiftMaster SJ Starter Parts — SJ1011, SJ1021, SJ1023 and SJ1043
Genuine replacement parts for the starter panel fitted to LiftMaster Speed Jack operators. This is the 10x12 enclosure used on the SJ1011, SJ1021, SJ1023 and SJ1043. The SJ1053 uses a different, larger panel — see the SJ1053 wall-mounted starter page.
The transformer and the overload are both model specific. Get the model number off the operator's data label before ordering — the table below maps each model to its parts. Parts marked no longer available have been discontinued and are listed for identification only.
Which Parts Fit My Model?
Enclosure, Transformers & Overloads
| Ref |
Part # |
Description |
| 2 |
21-16698 |
Transformer, 208/230/460–24V — SJ1023 and SJ1043 (K21-16698) |
| 2 |
K21-16699 |
Transformer, 120/208/240–24V — SJ1011 and SJ1021 |
| 3 |
25-2015 |
Overload, 15 A single phase — SJ1021 (K25-2015) |
| 3 |
25-2020 |
Overload, 20 A single phase — SJ1011 (K25-2020) |
| 3 |
25-4002-5K |
Overload, 1.8–2.6 A three phase (K25-4002-5K) |
| 3 |
25-4004-K |
Overload, 3.7–5.5 A three phase — SJ1023 |
| 4 |
25-3000-K |
Overload Bracket |
| 8 |
44-1210-4XH |
Enclosure Assembly, 10 x 12 |
Push Buttons & Contacts
| Ref |
Part # |
Description |
| 5 |
30-100-2 |
Push Button Operator, NEMA 4 |
| 6 |
30-111-2 |
Black Button, FC-BK NEMA |
| 7 |
30-112-2 |
Red Button, NEMA 1 and 12 |
| 7 |
30-301-2 |
Contact, N.C. red (K30-301-2) |
| 7 |
30-310-2 |
Contact, N.O. green (K30-310-2) |
Logic Boards, Switches & Timer
Options & Safety
| Part # |
Description |
| CPICARD |
CPI interface box |
| CPS-U |
Commercial photo eye |
| CPSUN4G |
Monitored through-beam photo eyes |
| CPS |
Safety eye sensors — mechanical operators |
| CPS-UN4 |
Safety eye sensors — commercial doors |
| K77-16011 |
Mounting hardware, CPS N4 |
| 65-5302 |
Pneumatic sensing edge, 22 ft, with take-up reel |
| LC-36A |
Safety eye sensors (no longer available) |
Related SJ Pages
Speed Jack operator parts — motors, gear reducer and brake · SJ1053 wall-mounted starter
