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Aperta Fail Secure Surface Strike Lock - 12VDC

£3599
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Aperta A1SLS is a fail-secure surface strike lock designed for access control systems on single and double doors. The lock body mounts to the door frame surface with screws through five fixing holes, and the 123mm x 70mm x 50mm body sits flush against the frame edge. When powered at 12VDC the lock releases, allowing the door to open. When power is removed or fails, the lock engages and secures the door.

Fail-secure operation suits high-security applications where the door must remain locked during power outages, fire alarm activations, or system failures. The lock is typically paired with a door controller, keypad or card reader on the secure side of the door, with a mechanical override handle or push-bar on the exit side to meet fire egress requirements. The 340g body provides enough holding force for standard residential and light commercial doors without requiring heavy-duty frame reinforcement.

The polished stainless steel finish provides corrosion resistance and a clean appearance against both painted and powder-coated door frames. The lock accepts 12VDC input from a dedicated access control power supply or door controller with integrated PSU. The compact 123mm length allows the lock to fit within standard door frame widths without protruding past the frame edge into the door reveal.

Specification
Product Net Weight (KG) 0.34
Product Gross Weight (KG) 0.37
Outer Gross Weight (KG) 16.65
Product Length (mm) 123
Product Width (mm) 70
Product Height (mm) 50
Outer Length (mm) 400
Outer Width (mm) 290
Outer Height (mm) 230
Downloads

Product Specification Sheet

Product Manual

Frequently Asked

What does fail-secure mean?

Fail-secure means the lock engages and secures the door when power is removed or fails. This is the opposite of fail-safe operation, where the lock releases during a power failure to allow free egress. Fail-secure locks are used where security must be maintained during outages, typically paired with a mechanical override on the exit side to meet fire safety requirements.

What voltage does the lock require?

The Aperta A1SLS operates on 12VDC. It must be paired with a dedicated access control power supply or a door controller with an integrated 12VDC output. Check the product manual for the exact current draw to ensure your power supply is adequately rated.

Is this suitable for outdoor use?

The stainless steel finish provides some corrosion resistance, but the lock is designed for internal door frame mounting in controlled environments. For outdoor or weather-exposed applications, verify IP rating and temperature range in the product manual before installation.

What tools are needed for installation?

Installation requires a drill and appropriate drill bits for the frame material, a screwdriver for the fixing screws, and a low-voltage cable for the 12VDC power connection. The lock body has five fixing holes for screw mounting to the door frame surface.

Shipping & Returns

Free worldwide delivery

Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

Returns

30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.

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    Description

    The Aperta A1SLS is a fail-secure surface strike lock designed for access control systems on single and double doors. The lock body mounts to the door frame surface with screws through five fixing holes, and the 123mm x 70mm x 50mm body sits flush against the frame edge. When powered at 12VDC the lock releases, allowing the door to open. When power is removed or fails, the lock engages and secures the door.

    Fail-secure operation suits high-security applications where the door must remain locked during power outages, fire alarm activations, or system failures. The lock is typically paired with a door controller, keypad or card reader on the secure side of the door, with a mechanical override handle or push-bar on the exit side to meet fire egress requirements. The 340g body provides enough holding force for standard residential and light commercial doors without requiring heavy-duty frame reinforcement.

    The polished stainless steel finish provides corrosion resistance and a clean appearance against both painted and powder-coated door frames. The lock accepts 12VDC input from a dedicated access control power supply or door controller with integrated PSU. The compact 123mm length allows the lock to fit within standard door frame widths without protruding past the frame edge into the door reveal.

    Specification
    Product Net Weight (KG) 0.34
    Product Gross Weight (KG) 0.37
    Outer Gross Weight (KG) 16.65
    Product Length (mm) 123
    Product Width (mm) 70
    Product Height (mm) 50
    Outer Length (mm) 400
    Outer Width (mm) 290
    Outer Height (mm) 230
    Downloads

    Product Specification Sheet

    Product Manual

    Frequently Asked

    What does fail-secure mean?

    Fail-secure means the lock engages and secures the door when power is removed or fails. This is the opposite of fail-safe operation, where the lock releases during a power failure to allow free egress. Fail-secure locks are used where security must be maintained during outages, typically paired with a mechanical override on the exit side to meet fire safety requirements.

    What voltage does the lock require?

    The Aperta A1SLS operates on 12VDC. It must be paired with a dedicated access control power supply or a door controller with an integrated 12VDC output. Check the product manual for the exact current draw to ensure your power supply is adequately rated.

    Is this suitable for outdoor use?

    The stainless steel finish provides some corrosion resistance, but the lock is designed for internal door frame mounting in controlled environments. For outdoor or weather-exposed applications, verify IP rating and temperature range in the product manual before installation.

    What tools are needed for installation?

    Installation requires a drill and appropriate drill bits for the frame material, a screwdriver for the fixing screws, and a low-voltage cable for the 12VDC power connection. The lock body has five fixing holes for screw mounting to the door frame surface.

    Shipping & Returns

    Free worldwide delivery

    Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

    Returns

    30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.