Liftmaster Commercial Door Operators

Pick your operator type below. The Maxum DC range is LiftMaster's current line, with battery backup and myQ built in. Each Maxum card opens a page where you choose your voltage. The other cards jump to the model tables further down this page.

Maxum JackshaftDC, battery backup. JDC and RJDC (manual release), doors to 700 lb LiftMaster Maxum JHDC hoist operator

Maxum HoistDC, battery backup. JHDC, doors 700 to 2200 lb LiftMaster Maxum TDC trolley operator

Maxum TrolleyDC, battery backup. TDC, doors 700 to 2200 lb LiftMaster T501L5 trolley operator

TrolleyTDC, T, GT, HCT ceiling-mount LiftMaster MJ5011U jackshaft operator

JackshaftJDC, RJDC, MJ, MGJ, CJ wall-mount LiftMaster H501L5 hoist operator

HoistJHDC, H, MHS, GH, CGH, CH with chain hoist LiftMaster SD501L5 slide door operator

Slide Door & CarwashSD501L5, CGT501L5 LiftMaster LJ8900W light-duty commercial jackshaft operator

Light-Duty CommercialLJ8900W, LJ8950W, ATSWT, DDO8900W

Not sure which mount or duty rating you need? See the buying guide below.

LiftMaster Commercial Door Operator Buying Guide

LiftMaster commercial door operators for rolling steel, sectional and high-traffic doors. Choosing one comes down to three things: how the operator mounts, how heavy the door is, and how often it cycles. Get the duty rating wrong and the unit wears out early, so the tables below start with those decisions rather than the model list.

Which Mount Do I Need?

Mount	How it works	Choose it when
Trolley T, GT, MT, TDC	Hangs from the ceiling, pulls the door along a rail	Sectional doors with headroom above the opening
Jackshaft J, MJ, MGJ, JDC, RJDC, LJ	Mounts on the wall beside the door, drives the torsion shaft	No ceiling room, or you need the overhead space
Hoist H, MH, GH, JHDC	Jackshaft mount with a manual chain hoist	Rolling steel doors, and anywhere the door must be workable by hand
Hoist / Jackshaft HJ, HMJ	Both disconnects on one machine	You want chain hoist and jackshaft release together
Slide / Door SD	Drives horizontal sliding doors	Side-sliding or accordion doors

Which Duty Rating?

Duty is about cycles per hour, not door size. A light-duty operator on a busy dock will fail early even if the door is well within its weight limit.

Rating	Typical use	Families
Light duty	A few cycles an hour — small warehouse, storage unit	ATSW, LJ8900W, LJ8950W, DDO8900W
Medium duty	Regular daily use — small commercial premises	MT, MJ, MH, MGJ, MHS
Industrial duty	Constant use — loading docks, distribution	T, GT, J, H, HJ, SD, Maxum
Heavy industrial	Continuous, largest doors	GH gear-reduced hoist, CGH, CGT
Carwash	Constant wet exposure	CJ1011, CJ5011, EGJ

The Maxum range runs on DC with battery backup as standard, so the door still works in a power cut. If that matters — and on a loading dock it usually does — start with the Maxum DC operators.

Maxum DC Operators — Battery Backup Standard

Choose the family, then your voltage. 208V and 600V 3-phase run from a 120/240V model with the step-down transformer accessory.

Family	Mount	Door weight	Shop by voltage
JDC	Jackshaft, battery backup included	700 lb	110-220VAC · 480VAC
RJDC	Jackshaft with manual release, left or right hand	700 lb	110-220VAC · 480VAC
JHDC	Hoist	700 – 2200 lb	110-220VAC · 480VAC
TDC	Trolley	700 – 2200 lb	110-220VAC · 480VAC

Trolley Operators

Model	Power	Duty
Maxum TDC	DC	Industrial, 700–2200 lb, battery backup
T501L5	1/2 HP	Industrial
T501L5 head only	1/2 HP	Industrial — reuses your rail
GT751L5	3/4 HP	Industrial, gearhead
HCT14	—	High traffic, 14 ft rail
HCTDCUL	DC	High traffic overhead

Jackshaft Operators

Model	Power	Duty
Maxum JDC	DC	Industrial, 700 lb, battery backup included
Maxum RJDC	DC	Industrial, 700 lb, manual release, left or right hand
MGJ5011	—	Medium, gear-reduced
MJ5011U	—	Medium, logic control
CJ5011	—	Carwash, industrial
CJ1011	—	Carwash, industrial

Hoist Operators

Model	Power	Duty
Maxum JHDC	DC	Industrial, 700–2200 lb, battery backup
H501L5	1/2 HP	Industrial
H751L5	3/4 HP	Industrial
MHS5011	—	Medium
GH151L5	1-1/2 HP	Heavy industrial, gear-reduced
CGH101L5	1 HP	Heavy industrial, carwash gearhead
CH501L5	1/2 HP	Carwash hoist

Slide Door & Gearhead Trolley

Model	Power	Duty
SD501L5	1/2 HP	Industrial slide door
CGT501L5	1/2 HP	Carwash gearhead trolley

Light-Duty Commercial

Model	Mount	Notes
ATSWT	Trolley	Chain drive, Security+ 2.0 and myQ
LJ8900W	Jackshaft	Wi-Fi, cable tension monitor required
LJ8950W	Jackshaft	Wi-Fi
DDO8900W	Dock door	Light-duty dock

Control Stations & Key Switches

Every operator needs a control station. Match the enclosure to the environment — NEMA 1 indoors, NEMA 4 outdoors or anywhere it gets wet.

Part	Type	Enclosure
02102	2-button	Indoor
02103L	3-button	Indoor
02108	3-button	Indoor
02-403	3-position open/close/stop	Indoor
02-403-N4XALD	3-button	NEMA 4 outdoor
02406	3-button	NEMA 4 outdoor
02110	Key, open/close/stop	Indoor
02410	Key, open/close/stop	NEMA 4 outdoor
02409	Key switch	NEMA 4 surface mount
02409B	Key switch, Best cylinder	NEMA 4
02-407	Key, on/off	Outdoor
KPW5	Wireless keypad, 5 code	Security+ 2.0
DCWALLCTL	Wall control, DC operators	Indoor

Safety Sensors & Edges

Commercial doors need monitored entrapment protection. These fit across the LiftMaster commercial range.

Part	Description
CPS-U	Commercial photo eye — ships with every Maxum
CPSUN4G	Monitored through-beam photo eyes
CPS	Safety eyes — mechanical operators
CPS-UN4	Safety eyes — commercial doors
K77-16011	Mounting hardware, CPS N4
655302	Pneumatic sensing edge, 22 ft, with take-up reel
CPICARD	CPI interface box

Sprockets, Chain & Mounting

Part	Description
71-1550B18LGH	Sprocket kit, 50B18, 1" bore
71-1550B22LGH	Sprocket kit, 22 tooth, 1" bore
71-1550B32LGH	Sprocket kit, 50B32, 1" bore
71-1550B72QGH	Sprocket kit, 72 tooth, 1.25" bore
71-1541B32LGH	Sprocket kit, 41B32, 1" bore
71-1541B60LGH	Sprocket kit, 41B60, 1" bore
JAN41	Chain and sprocket kit, Janus doors
041A7280	Dead-shaft sprocket kit, 3950
3950mb	Mounting bracket, 3950 and 8500
089098	Mounting bracket
DC7AH	Battery backup unit, commercial DC, 7AH

Replacement Parts

Repair parts for every operator on this page, with exploded diagrams and part numbers:

For	Go to
All LiftMaster commercial door operators	LiftMaster commercial door parts
Maxum JDC, RJDC and JHDC	Maxum jackshaft & hoist parts
Maxum TDC	Maxum trolley parts
Electrical boxes and logic controls	Commercial door parts by model

Not Sure Which Operator?

Tell us the door type and weight, the opening size, how many cycles a day it runs, your headroom and side room, and the power at the door. Call (866) 965-5599 — we would rather spec it right than sell you the wrong duty rating.