LiftMaster SUB300K Underground Gate Opener Kit - Double (230v, 4.0m, 600kg)
Strong and Study

Built To Last

High quality materials combined with a strong and resistant design ensure a long service life.

The LiftMaster SUB300K is a 230v double underground gate opener kit, part of the LiftMaster SUB series. Motors in this kit support gates that are up to 4.0m in length, with a smaller gate length (2.5m) it allows for support of a gate up to 600kg in weight.

Ideal for residential areas thanks to ultra-quiet, maintenance-free operation.

Downloadable Materials:

PDF SUB300M 230v Motor Manual (.pdf)

PDF CB11 Control Board Manual (.pdf)

PDF CB11 Control Board Simplified Setup (.pdf)

Smart Solutions:

  • Powerful performance thanks to underground drive system
  • Installed under the gate, set in secrecy, great for installations that don't affect the aesthetic of a stylish gate
  • Smooth operation thanks to soft-start / soft-stop technology, resulting in no harsh banging / clattering of gates
  • Can be partially opened with the pedestrian mode for times when full opening is not required
  • Includes built-in stops - no ground stops needed.
  • Stainless steel upgrade available if the galvanised boxes don't take your fancy (contact us for more information by clicking here)

Reliable and Quiet:

  • Extremely quiet AC motor eliminates noise and vibrations to provide smooth operation
  • Made from high quality materials, providing a long service life
  • Clean and maintenance-free electro-mechanical motors ensure less hassle
  • Strong and resistant design

Safe and Secure:

  • Timer-to-close function to automatically closes the gate after a preset amount of time
  • Rolling code radio (security+) transmits a new code with every click of the remote
  • 8.2K safety circuit input for connection of safety edges
  • Separate force setting per gate wing
  • Ideal for gates in residential areas

What's Included:

  • 2 x SUB300M electro-mechanical underground gate motor (230v)
  • 2 x SUB300B zinc coated, rust resistant foundation box
  • 2 x SUB110 Arms with stops and release keys.
  • 1 x CB11 control panel
    • Radio Board: 801221
  • 2 x TX4UNIS 433 MHz, 2 channel remote controls
  • 1 x 772E pair of adjustable failsafe photocells
Weight (kg)10 (motor only)
Motor TypeElectro-Mechanical
Electrical Data
Capacitor (μF)10
Current (A)2.1 (nominal)
Motor Voltage230v
Power (W)300 (nominal), 350 (max)
Voltage Supply230 - 240v AC (50 / 60 Hz)
Gate Specifications
Automation TypeUnderground
Kit TypeDouble
Max. Gate Leaf Length (M)4.0
Max. Gate Weight (KG)600
Performance Data
Force (N)380 (nominal tractive)
Motor Duty Cycle ED30%
Speed (Degrees/Sec)8
Speed (RPM)1400
Time To Open 90°~15 s
Torque (Nm)380
Work Cycle (cycles/day)60
Working Temp. (°C Min/Max)-20°C to +55°C
Protection Level (IP)67

LiftMaster SUB300K Underground Gate Opener Kit - Double (230v, 4.0m, 600kg)

  • Brand: LiftMaster
  • Product Code: SUB300K
  • Availability:  In Stock


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Tags: SUB300, Sub 300, Liftmaster SUB


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