Liftmaster LA400UL / LA400PKGUL 24VDC Residential Swing Linear Actuator Gate Opener Operator
The LA400PKGUL is LiftMaster's residential 24VDC linear actuator package for a single swing gate. It is the operator package typically selected when a homeowner needs a primary swing gate actuator, control box, batteries, and monitored safety-device support in one system rather than only a replacement arm.
This operator is intended for properly constructed single swing gates within the published residential rating. Because the actuator pushes and pulls through a bracket-mounted geometry, correct post bracket placement, gate bracket placement, hinge condition, and stop placement matter just as much as the operator model. A gate that drags, is out of level, or is outside the rating can shorten actuator life and create nuisance force or obstruction issues.
The LA400UL generation is designed around current monitored entrapment protection requirements. That means a compliant installation must use the correct monitored photo eyes, edges, or other approved safety devices for the site. It should not be installed as a bare actuator without safety protection, and older non-monitored devices should not be assumed to satisfy the current control board requirements.
Find Replacement Parts for LA400UL
Compatible With
Operator and model family
- LiftMaster LA400UL residential swing gate operator systems
- LiftMaster LA400PKGUL single swing gate packages
- LiftMaster LA400DC primary actuator arm applications
- Single residential swing gates up to 16 ft. or 850 lb., when the gate is within LiftMaster rating and installation geometry
- Can be paired with LA400DCS for a dual swing gate installation when the correct control box, wiring, and monitored safety devices are used
- Compatible with select LiftMaster myQ and Security+ 2.0 accessories when supported by the installed control board
Common related accessories and system parts
- LA400CONTUL control box/control panel kit
- LA400DCS secondary actuator arm
- Monitored photo eyes such as LMRRU or other LiftMaster-approved monitored entrapment devices
- LiftMaster wireless controls and access-control accessories that match the LA400UL control board
Features and Specifications
| Manufacturer | LiftMaster |
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| Product Type | Residential linear swing gate operator package |
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| Part Number | LA400PKGUL |
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| Motor / Operator Type | 24VDC linear actuator |
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| Application | Single residential swing gate |
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| Gate Rating | Up to 16 ft. or 850 lb. when properly installed |
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| Battery Backup | Yes, system uses battery backup |
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| Security Technology | Security+ 2.0 / myQ capable when used with compatible accessories |
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| Safety Monitoring | Requires monitored entrapment protection devices for compliant installation |
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| Compatible Operator Type | Swing gate operator |
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Also Known As / Related Part Numbers
- LA400PKGUL
- LA400UL
- LA400DC
- LA400
- LA400U
- LA400CONTUL
- LA400DCS
- LA400PKGU
- LA400PKG
- LA400-UL
Technician Note
Use this package when replacing or installing the primary LA400UL single swing gate operator, not when only a secondary arm is needed. Always verify the gate swings freely by hand before connecting the actuator.
Before Ordering Checklist
- Confirm the gate is no more than 16 ft. or 850 lb. and is structurally sound.
- Confirm this is a single-gate primary package, not a secondary-arm-only purchase.
- Check hinge condition, gate stops, bracket geometry, and available setback before installation.
- Confirm monitored safety devices are planned for all required entrapment zones.
- Verify accessory wiring, battery condition, and local code requirements before powering the system.
Professional Advisory
A qualified gate technician should install and set up the operator if the gate requires welding, high-voltage work, safety-device layout, or troubleshooting of unsafe gate movement.
Important Ordering Warnings
- Do not bypass monitored photo eyes, edge sensors, or required entrapment protection.
- Do not use this package on a gate that exceeds the published length or weight rating.
- Do not assume older LA400 accessories or control boxes are interchangeable without checking the parts diagram.
Product Q&A
Is the LA400PKGUL the complete single swing gate opener package?
Yes. LA400PKGUL is the single-arm LA400UL package for one residential swing gate. It is different from LA400DCS, which is the secondary actuator used for dual-gate installations.
What size gate can the LA400PKGUL handle?
It is commonly rated for residential swing gates up to 16 ft. long or 850 lb., provided the gate is balanced, moves freely, and is installed with correct geometry.
Can this be used for a dual swing gate?
The LA400PKGUL can serve as the primary package in a dual-gate setup when paired with the correct LA400DCS secondary arm and proper wiring, controls, and safety devices.
Does this system require monitored safety devices?
Yes. Current LA400UL installations require compatible monitored entrapment protection. Safety devices should not be bypassed.
Is this the same as only buying an LA400DC arm?
No. LA400DC refers to the actuator arm, while LA400PKGUL is the package. Check the included components before ordering.
