The smaller picture is of a typical mortise type lock.
In 1999, Securitron revolutionized the Electric Strike industry
by introducing the UnLatch. This patented product directly screws into
the existing door frame in seconds, with no frame routing needed. The
installation is fully concealed for maximum esthetic appeal. The
UnLatch supports full dead latch function, releases under pressure and
includes a latch status sensing output as a standard feature. But the
original UnLatch operated cylindrical/tubular latches only. The all new
MUNL Mortise UnLatch extends UnLatch technology to Mortise locks.
All the amazing benefits of the original UnLatch are retained and a dramatic
new one is added: the Mortise UnLatch includes field adjustability
for latch and dead latch positions so that one model works with all
North American Mortise Locks*. This eliminates the considerable hassle
of matching up the electric strike model with the Mortise Lock type.
You only need to determine whether the door has a cylindrical or mortise
type lock to pick the perfect UnLatch for the job!
•The Securitron Lifetime Warranty: If any regular Securitron product ever fails they will
replace it for free! All you do is send the defective item to them and they will replace it
the following day! It's an unconditional warranty from a great company!
Click here for more lifetime warranty infoHow it works
A Mortise lock includes a latch and dead latch pin. When the
lock is in the closed position, the latch is extended (securing the door)
and the dead latch pin is pushed in. This internally pins the latch so that
the door can’t be opened by sliding a plastic card in against the latch.
The Mortise UnLatch operates the latch and dead latch pin as follows:
In the secure condition, the latch is captured in a cavity against the
latch plunger while the dead latch pin is pushed in by a flush finger
plate. The lock is released in two quick steps. First the finger plate
draws back which releases the dead latch pin and then the latch plunger
and finger plate move forward together which releases the door. When
the door is reclosed, the Mortise UnLatch automatically re-secures it
including reestablishing full dead latch security.Adjustment to any mortise lock
The chief problem with procuring electric strikes to work with
North American Mortise Locks is that there is no standard or
commonality among the lock manufacturers as to the vertical position
of the latch and dead latch pin in the standard ANSI 4 7/8 door preparation.
This means that the electric strike must be specified and purchased
individually to suit the particular Lock model on the door. Until
the introduction of the Mortise UnLatch! The UnLatch is set by the installer
in the field, just prior to installation, to correspond to the Lock
model. As the graphic below shows, the latch cavity can be moved
anywhere on the UnLatch face with the finger plate occupying the space
above and below the latch cavity. The instructions show the correct
setting for all North American Mortise Lock models and adjustment is
done quickly with a screw driver and allen wrench. Product selection,
inventory and service issues are all drastically simplified with the Mortise
It’s rare to find a product without weaknesses which satisfies
all functions sought in an access control installation but the Mortise
UnLatch achieves this. Security concerns are met by the UnLatch’s full
use of the dead latch function and by the fact that the latch is surrounded
by steel (there is no pivoting keeper) and the frame is not weakened by
a side-cut. This yields maximum strength. And the full concealment
achieved in an UnLatch installation means a vandal can’t get at it. This
leads to unmatched appearance on the door to satisfy the concerns of
specifiers and end users as to the esthetic appeal of the finished installation.
The UnLatch is simply invisible on the door.
System compatibility is optimized by the fact that the UnLatch
includes integral SPDT latch status sensing. It reports to the access
control or alarm system only when the latch is fully seated. This contrasts
with most electric strike installations which make use of separate
door contacts to report when the door is closed but not necessarily
secure. Integral latch sensing also simplifies the installation and
further improves the finished appearance at the door by eliminating the
need for magnetic contacts.
And installation simplicity is possibly the UnLatch’s most dramatic
feature. When the need to rout the door frame is eliminated, time
is not only saved but the same skills appropriate for the electronic work
of putting in an access control system are fully adequate to install the
UnLatch. So a single team of technicians can do all the work. In daily
function, the UnLatch also shines. It releases the door even under a
pre-load and since there is no keeper to wear out or fail, the UnLatch
provides outstanding resistance to abuse and years of trouble free operation.
Which is why Securitron is able to cover this product with our
amazing MagnaCare lifetime warranty.Size
: Standard ANSI 4 7/8" Strike.
3-5/8" Long, 1-1/4" Wide, 1-7/8" Deep 91 x 32 x 50mm
: 12 & 24 VDC +20% -10%. Full wave rectified, DC acceptable.
: (@ 12VDC) 40mA continuous, minimum 700mA when
motor is operating.
(@ 24VDC) 40mA continuous, minimum 500mA when motor is
Higher capacity supply (1-4 Amps) is recommended for start-up
inrush to achieve best operation under pre-load.
: No Solenoids.
Operating Temperature Range
: -20oF to 125oF
Stainless Steel Face with Metal Enclosure.
Supplied with 10 ft. Cable.
Mounting Fasteners Included.
U.S. Patents #5,474,342 and #6,022,056 with
other U.S. and international patents pending
operates North American
mortise latches, and does
not support cylindrical or
Digital keypad system
Proximity card Reader
Multi Door Proximity Access Control
Receptionist unlock button
Wireless Electric strike controller Please note
: If you'll be using this strike with a Corbin brand mortise lock please call before ordering.Don't forget the power supply
! Go here
Or a power supply with back up battery system