To provide secure locking of swinging passage / control doors controlled by ATLAS® LCMS software or conventional key control. Designed to enable operation from both sides of the door using either an electronic token or conventional key. This lock is specifically designed for very high use applications; typically securing perimeter doors and main access routes.


The 3A63 is a mortice lock of robust construction based on the Chubb Locks Custodial Services large mortice footprint. The main bolt is a sprung latch providing a throw of 25mm, secure locking is achieved by two independent methods:

Electronic Mode

Locking/unlocking by controlled sequence from ATLAS® LCMS system after mutual authentication of token at the lock or via control room input. Bolt withdrawl by handle, which should also be used when closing the door.

Manual Mode

Locking/unlocking achieved using conventional (mechanical) key. Bolt withdrawl by handle, which should also be used when closing the door.

Manual Override

In the event of power or communication failure an override key is used to lift the electronic locking unit.

The lock will operate if slammed to shut, however CLCS recommend that in normal operation the handle is used to withdraw the bolt when closing.

3A63 lock is an intelligent lock and has a built in lock PCB with memory. The lock does not rely on continuous communication with the main server to operate as it will store the latest set of access permissions issued by the server.


Solid Case Technology; Lock case machined from single piece carbon steel block.

Steel main bolt, with carbide anti-cutting rollers and 25mm throw.

Unique dual solenoid electric locking latch.

Independent 8-lever locking mechanism.

Lock provides status monitoring of critical functions and tamper.

Integral baffle arrangements to resist manipulation and interference via the keyhole.

Dedicated key profile operates 3R63 group of locks only.


Mechanical locking mechanism tested to a minimum of 300,000 operations.

Handle mechanism tested to a minimum of 1,000,000 bolt operations

Solenoid locking unit tested to a minimum of 1,000,000 cycles.

Solenoid arrangement designed to operate at +/-10% of 24V DC regulated supply.

Nominal operating current 500mA.

Additional Features

Supplied with 'T' Handle as standard.

Range of fixings including reinforcing plates and locking plates.

Gate boxes for steel door applications recommended.

Interchangeable mechanical inner locking unit to enable re-coding.

This lock is not available under a master key system.

Escutcheon trim plates supplied for wooden door variants as standard.

Materials and Finishes

Lock case - carbon steel electro-plated.

Main bolt - carbon steel electro-plated.

Main bolt follower - high tensile brass.

Keys - hardened steel

Escutcheons - silica brass

Levers and springs - brass / phosphor bronze.

Dimensions and weights

Case Height - 206mm
Case Length - 229mm
Case Thickness - 29mm
Bolt Throw - 25mm
Bolt Depth - 45mm
Bolt Thickness - 22mm

Weight (lock only) - 12.4kg

Total Range

The lock is available in left or right hand variants  and can be fitted to steel or wooden doors.
NOTE: Supplied as standard to suit maximum door thickness of 54mm. For door thickness above 54mm please contact CLCS for options available.

Fully dimensioned customer drawings are available on request to assist with door preparation.