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The YD25K is a low voltage electronic deadbolting door lock with provision for manual override. Suited for securing commercial or residential doors because of its streamlined dimensions. The YD25K offers a great solution for narrow doors requiring a manual operation in addition to electronic control. Hidden in door frames or surfaces mounted to glass doors with the aid of accessories, this lock has been used successfully for over 25 years worldwide.


The benefits offered by utilising a market-leading solenoid drop bolt with the addition of a mechanical key override function when needed, all in a streamlined package.


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    • Mechanical key override provides the flexibility to have a fully access controlled site while still having a manual means to unlock a door if required.


    • Reliable and durable, the YD25K has been tested and approved to offer continuous locking for over 1,000,000 cycles. This, coupled with a holding force of 10,000N, ensures long term security in high traffic environments.


    • Offering feedback to the control panel of the door, bolt and key positions is a standard feature of the YD25K. Monitoring the position of the door and whether the bolt pin is extended or retracted provides vital information needed to ensure a site is safe and secure.


    • Flexibility in installation as the YD25K only requires low voltage power and signals to operate and can connect into any access system making wiring easy.

    Ideal use case

    Sites that require electronic access control with the flexibility of a mechanical override of the lock. Typically seen in commercial applications but have been used across all market sectors to solve unique problems.

    Options and Accessories
    Model Comparison
    Key Override

    The YD25K is compatible with a euro-style key cylinder for mechanically overriding the deadbolt when set to fail secure and electrically overriding the lock when set to fail-safe.

    High Security

    With a stainless-steel bolt pin, the YD25K has a holding force in excess of 10,000N. In addition, onboard control provides auto-relock and timed relock for added security.


    The durable design of the Solenoid Drop bolt range has made it one of the most reliable electromechanical locks in the world, rated at 1,000,000 cycles.

    Complete Monitoring

    The YD25K can output the bolt position, door position and key position as monitor signals. Monitoring the position of the door, whether the lock is open or closed and if the key is in activated or not, the YD25K will connect to your access control system to display the status of the lock for security.

    Low Current Consumption

    The YD25K will draw as little as 160mA holding current at 12VDC by utilising the built-in current reduction circuitry. Low current paired with high-security access control makes the YD25K a preferred product choice for many industry leaders.

    Integrated Access Control

    With factory-set fail safe and fail secure variants and multiple attempts to lock or unlock, the YD25K is ready for a wide range of application requirements. It can be integrated easily with access control or alarm systems.

    Versatile Installation

    The YD25K can be morticed flush into both the side, or top of many door frames although with the mechanical key override it is common to have it in the side. The lock is supplied with a short strike plate as standard but additional items are available in the form of a long strike plate, housing, and dress plate. These products allow the lock to be surface mounted when mortice installation isn't a preferred, or viable option. The housing and dress plates are supplied with self-adhesive tape for instant application to glass doors and door frames

    Door Gap 6mm maximum

    Static Strength 10,000 newtons (1,000Kg)

    Endurance Cycle tested to 1,000,000 operations

    Bolt Pin ø12.7mm, 16mm extension, ø15.5mm receiver

    Key Cylinder Euro-style (not included)

    Voltage at Lock 12-24VDC ±10%

    Current Usage Holding: 130mA@12V,80mA@24VMaximum: 1.5A@12V, 1.4A@24V

    Monitor Switch Ratings 24VDC, 0.5A

    Materials Lock / Strike Plate: Stainless Steel 304, Bolt Pin: Stainless Steel 304

    Compliance and Certification CE Compliant, RoHS 2 Compliant FCC Part 15 Compliant

    YD25K Models

    The YD25K locks are offered in either fail safe or fail secure configuration and are supplied with a short strike plate and mounting screws.

    • YNL141A – YD25K Fail Safe Lock and Strike
    • YNL142A – YD25K Fail Secure Lock and Strike
    YD25K Accessories 

    For installations requiring surface mounting of the lock, housings and dress plates are available. Both the housing and dress plates are supplied with self-adhesive 3M® tape for instant application to glass doors and door frames.

    • YNL144J – Housing with tape - bolt
    • YNL145J – Housing with tape - strike
    • YNL146J – Dress Plate with tape
    • YNL143A – Short Strike Plate
    • YNL143E – Long Strike Plate

    YD25K Brochure

    YD25K Instructions

    Lock Model Comparison

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    enquiries@bqtsolutions.com+64 (0)9 441 7630
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