LCN 4040SE.US28 | Electro HO Door Closer
LCN 4040SE.US28 | Electro HO Door Closer

LCN 4040SE.US28 | Electro HO Door Closer (4040)

Finishes: US28 Silver w. Matching Arm & Track

Discover the LCN 4040SE.US28 electro HO door closer, a premier solution in electro-hydraulic door closers designed for fire and smoke barrier doors. This heavy-duty, non-handed Sentronic series door closer offers reliable single-point hold-open functionality. It seamlessly integrates with fire alarm systems for increased safety in commercial and institutional settings. Featuring adjustable spring power from size 3 to 4, the LCN 4040SE.US28 ensures smooth rack-and-pinion operation when the hold-open is disengaged, with a durable cast-iron cylinder tested to over 10 million cycles for long-lasting performance.

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  • Additional Product Details

    Electromagnetic Hold Open Heavy Duty Closer 24Vac/dc w. Backcheck, Plastic Cover and Sentronic 24V Track. Spring Power Adjustable Size 3-4. Universal Track for Two Possible Applications*. 

    This variant includes:

    Cylinder - 4040SE-3071
    Standard, non-handed cast iron cylinder assembly

    Standard Arm - 4040SE-3077T
    Non-handed arm.  Arm is adjustable to select the hold-open point

    SE Track - 4040SE-3038
    Non-handed. Mounts on either head frame or stop, 24Vac/dc input for holding solenoid
    Includes test switch assembly with fuse

    Track Roller - 4040SE-3034SE
    Quiet, low-friction roller assembly. Shoulder dimension "X" = 3mm with Track Slider - 4040SE-168 Alloy metal slider for use in SE series tracks only

    Suits doors <102 kilos 

    *UKCA & CE Certification applies to Hinge (Pull Side) Mounting Only

    Your compatible 24V power supply is available here: RGL 2402/4TRS | 24Vdc 2.0 Amp Power Supply (PSU)

    The 4040SE Sentronic® is a heavy-duty, non-handed, non-sized closer/holder designed to provide single-point hold-open for fire and smoke barrier doors. The door remains open until the current interruption releases the holding mechanism, then closes. This single lever (track) arm closer is specifically designed for interior doors. A choice of finishes, track functions and installation accessories meets virtually all life safety requirements.

    • Standard 4040SE series closer shipped with a standard arm, 24V SE track, standard cover and wood & machine screw pack
    • Non-sized cylinders for interior doors to 1220mm
    • Hold-open force is adjustable
    • Momentary on/off switchboard assembly for testing door release, also provides over-voltage protection. Field replaceable
    • Functions as a full rack and pinion closer when hold-open is not engaged or current is interrupted
    • Closer mounts on either push or pull side of the door
    • Non-handed for mounting on either right or left-hand door
    • Universal Sentronic track offers concealed or surface wiring
    • Interfaces with alarm systems. Consult Relcross for full details
    • Standard or optional custom powder-coated finishes on the cover, arm and fasteners
    • Optional plated finishes
    • Non-handed
    • Requires additional system components
    • Surface Mounting
    • For interior fire and smoke barrier doors. Single-acting cylinder on the door top rail
    • Exposed arm and track to the head frame
    • Maximum Opening - Butt hinge template allows 110° with hold open points between 85° and 110°
    • Optional SEL special long track allows hold open points between 90° and 120° in approximately 3° increments
    • Consult Relcross for all pivot-mounted installations
    • Butt Hinges should not exceed 127mm in width.
    • Auxiliary Stop is recommended at the hold open point
    • All Weather Fluid - Performs without variation: Manual Closers - between -35° to +49°, Electronic HO Closers & Automatic Operators - between +2° to +49°C, At approx. +75°C, the fluid will begin to leak from the mechanism. The flash point is approximately. 110°C


    The 4040 series is LCN’s most durable and flexible heavy-duty closer, fully certified to both EN 1154 and ANSI A156.4. The LCN 4040 will cope with the most gruelling applications and has earned an unrivalled reputation for extreme durability and reliability in use.

    Briton Fire Door Closers | Briton Exit Devices | Briton Locks | LCN Closers

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    Relcross Limited (trading as) Door Hardware Online | Hambleton Avenue | DEVIZES | Wiltshire | SN10 2RT | United Kingdom | T: ++ 44 (0) 1380 720 062 | F: ++ 44 (0) 1380 729 888 |  E: britonsales@doorhardware-online.co.uk 

  • Certification

    UK Fire Certification in accordance with BS EN 1634-1:2014 (timber) - 120 mins
    UK Fire Certification in accordance with BS EN 1634-1:2014 (steel) - 60 mins
    WFRC No. 142058 

    EN 1154: 1996 + A1: 2002/AC:2006
    EN 1155: 1997 + A1: 2002

    UKCA | CE | ANSI | UL | 120 Mins Timber | 60 Mins Steel | Warranty: 10 Years (Mechanical), 2 Years (Electrical)

    Certificates, including DoPs downloadable here

  • Resources | Downloads

    LCN 4040SE.US28 | Electro HO Door Closer - Installation