Accentra 4781LN Monroe Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$729.00
$648.29
Yale Commercial Yale 4781LN Monroe Grade 1 Fail Secure No Override Electrified Cylindrical Lever Lock YAL-MO4781LN

Accentra 4781LN Monroe Grade 1 Fail Secure No Override Electrified Cylindrical Lever Lock

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Model: MO-4781LN-626 12V
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$729.00
$648.29
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Yale 4700LN Series Lever Locks

Yale 4700LN cylindrical locks are the ideal choice for a wide variety of commercial applications where consistent quality, ease of use and installation are required at an economical price. The4700LN series is certified to ANSI/BHMA Grade 1 standards and is UL fire-listed for all functions ensuring reliability and peace of mind.

 

FEATURES & BENEFITS

  • ANSI/BHMA: A156.2, Series 4000 Grade 1
  • UL-cUL: UL-cUL fire-rated up to 3 hours
  • Windstorm: 4700LN Certified (refer to local codes)
  • Mechanism: Heavy-gauge steel, die-cast, zinc-plated, chromated
  • Backset: 2-3/4" standard
  • Latchbolt: 1/2" stainless steel throw standard
  • Guardbolt: Deadlocks latchbolt when door is closed; standard on all locking functions
  • Door Thickness: 4700LN adjustable from 1-3/8" to 1-3/4". 4700 adjustable from 1-3/4" to 2"
  • Fronts: 2-1/4" x 1-1/8" beveled standard; flat fronts available to order
  • Cylinders: Brass, 6-pin, keyed-random cylinder with two keys furnished standard, 7-pin not available.
  • Reversibility: Non-handed
  • Strikes: ANSI strike 4-7/8" x 1-1/4" x 1-1/4" lip to center supplied standard. Optional T-strike available to order for 4700LN.
  • Finishes: 4700LN available in 7 finishes, 4700 available in satin stainless steel (630) only.
  • Warranty: 5-year mechanical

 

CERTIFICATIONS

  • ANSI/BHMA Grade 1 certified
  • ADA compliant for ease of accessiblity

 

DOWNLOAD & RESOURCES

Product Specs

Series:
4700 Series
Subcategory:
Cylindrical
Grade:
Grade 1
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Leversets
Commercial/Residential:
Commercial
Electronic:
Yes
Lock Type:
Cylindrical
Handle Type:
Lever
Product Model:
YAL-4781LN
Lever Design Name:
Monroe Lever
Product Category:
Mechanical Locks
Department:
Door Hardware

Accentra MO-4781LN-626 12V – Frequently Asked Questions

1) Will the Yale/Accentra 4781LN electrified lever lock fit a 1-3/8 inch door?
Yes. The 4700LN cylindrical locks adjust from 1-3/8 inches to 1-3/4 inches, so the 4781LN covers both the common older interior thickness and standard commercial 1-3/4 inch doors. If your door is thicker than 1-3/4 inches, up to 2 inches, that is the 4700 (non-LN) chassis instead, and it only comes in satin stainless steel 630.
2) What happens to the 4781LN lock when power is lost?
It is a fail secure lock with no mechanical override on the outside lever. Drop the power and the outside lever stays locked; entry is by key only. Inside lever always retracts the latch for free egress. If you need the opening to unlock on power failure (common on stair doors or where code requires it), you want a fail safe electrified lock, not this one.
3) Does the 4781LN come in 12 volt or 24 volt?
Both. Every finish is offered in 12VDC and 24VDC, so match the coil to whatever your access control power supply puts out. The voltage is a build option on the lock, not field changeable, so specify it on the order.
4) Will this Yale lever lock latch into my existing ANSI strike?
It should. The 4700LN ships with an ANSI strike measuring 4-7/8 x 1-1/4 inches with a 1-1/4 inch lip to center, which is the standard commercial frame prep, and the latchbolt has a 1/2 inch stainless throw. If your frame is prepped for a T-strike instead, that is available to order on the 4700LN. Front is 2-1/4 x 1-1/8 inch beveled as standard, with flat fronts available.
5) What backset does the 4781LN use, and do I have to specify handing?
Standard backset is 2-3/4 inches, which is the usual commercial bore location. Handing is not a concern: the 4700LN is non-handed and the Monroe lever can be installed on either hand without disassembly. That makes it easier to stock one lock across a building.
6) Can I use the 4781LN on a fire rated door?
Yes. The 4700LN series is UL-cUL fire listed for all functions up to 3 hours, and it carries ANSI/BHMA A156.2 Series 4000 Grade 1 certification. The guardbolt deadlocks the latchbolt when the door closes, which is standard on all locking functions in the series. The series is also windstorm certified, though you should read that against your local code.
7) What is the closest electrified cylindrical lever equivalent to the Accentra 4781LN from another brand?
The Corbin Russwin CL33903 electrified cylindrical lever lock is the closest match in the same category. Both are Grade 1 electrified cylindrical levers. The key difference is the electrical behavior: the Accentra 4781LN is a fail secure function with no override, while the CL33903 is a fail safe lever, meaning it unlocks when power is removed rather than staying locked. The CL33903 is offered in a 12VAC/DC configuration and is listed for 1-3/4 inch to 2 inch doors; the 4781LN Monroe is ordered in either 12VDC or 24VDC. Confirm which failure mode the access control drawing calls for before substituting one for the other.
8) I need a fail safe lever instead of fail secure - what should I order?
The Accentra 4781LN Monroe is a fail secure lock with no override, so it stays locked when power is lost. If the opening requires the lever to release on power loss - a common requirement on egress-critical or fire alarm released doors - the Corbin Russwin CL33903 is a Grade 1 fail safe electrified cylindrical lever, available in a 12VAC/DC version and in an NZ lever with D rose configuration. Fail safe and fail secure are not interchangeable, so the choice should follow the life safety and access control spec for the door, not the hardware already installed.
9) My door is 2 inches thick - will the 4781LN fit, or do I need a different lever?
The 4700LN chassis is adjustable from 1-3/8 inch to 1-3/4 inch, while the 4700 chassis covers 1-3/4 inch to 2 inch. If the opening is a full 2 inch door and you need a different platform, the Corbin Russwin CL3110 Grade 1 vandal resistant passage lever and the Corbin Russwin CL33903 electrified lever are both listed for 1-3/4 inch to 2 inch, and the Falcon K101 Grade 1 passage lever covers 1-3/8 inch to 2-1/4 inch. Only the CL33903 among those is an electrified lever.
10) What keying comes with the Yale 4781LN, and can I get it in 7-pin?
Standard is a brass 6-pin keyed-random cylinder with two keys. Seven-pin is not offered on the 4700LN, so if your facility is standardized on a 7-pin master key system this lock will not join that keyway without a different cylinder platform. For a keyed-alike or master keyed building, plan the cylinder order accordingly rather than relying on the keyed-random default.
11) Is this lock ADA compliant for a classroom or office building?
Yes, the 4700LN series is ADA compliant, and the Monroe lever shape gives the push-down operation that satisfies the no-tight-grasping requirement. It is a commercial-duty lock, Grade 1, rather than a residential set.
12) I need matching non-electrified levers on the rest of the doors in the building. What pairs with an electrified 4781LN?
Stay within the 4700LN series for the mechanical openings so the Monroe lever, 2-3/4 inch backset, ANSI strike prep and finish all line up with the electrified door. Only the access controlled opening needs the 4781LN; passage, privacy and storeroom functions in the same series share the same chassis prep, which keeps one door prep and one finish across the job.
13) Is the 4781LN a mortise lock or a cylindrical lock?
Cylindrical, bored into the door face rather than into a mortise pocket in the edge. That means a standard 2-1/8 inch cross-bore door prep with a 2-3/4 inch backset and an edge bore for the latch, not the deep mortise cutout a mortise lock needs. Chassis is heavy-gauge steel, die-cast, zinc-plated and chromated.
14) If the door does not need electrified hardware, what Grade 1 cylindrical lever can I use instead?
For a mechanical opening with no access control wiring, several Grade 1 cylindrical levers cover the common functions. The Dexter C1000 Series offers classroom, classroom security, asylum and passage functions, with the classroom and passage versions listed for 1-3/8 inch to 1-3/4 inch doors and the asylum version for 1-3/8 inch to 2 inch. The Falcon K101 is a Grade 1 heavy duty passage lever, fire rated, for 1-3/8 inch to 2-1/4 inch doors, and the Corbin Russwin CL3110 is a Grade 1 vandal resistant passage lever for 1-3/4 inch to 2 inch doors. None of these carry the electrified fail secure operation of the 4781LN Monroe.
15) Is a keypad lever lock a substitute for the 4781LN electrified lock?
They solve different problems. The Accentra 4781LN Monroe is an electrified fail secure cylindrical lever that is wired to an access control system at 12VDC or 24VDC and has no mechanical override. A keypad lever such as the Delaney LP250 Grade 2 electronic keypad leverlock, the Emtek Classic Keypad Leverset, or the Lockey 2835 mechanical pushbutton keyless lever - which fits 1 3/16 inch to 2 inch doors - operates standalone at the door with no wiring back to a panel. If the door is part of a card reader or credential system, a standalone keypad will not tie into it.
16) What is the difference between the Accentra 4781LN and a Grade 2 commercial lever like the Hager 2580 or Cal-Royal AG05?
The Accentra 4781LN Monroe is certified to ANSI/BHMA A156.2 Series 4000 Grade 1 and is an electrified cylindrical lever. The Hager 2580 is a Grade 2 storeroom cylindrical lock with a Withnell lever for 1-3/8 inch to 2 inch doors, and the Cal-Royal AG05 is a Grade 2 storeroom lever with a deadlocking latchbolt for 1-3/8 inch to 1-3/4 inch doors. Both are mechanical storeroom locks keyed at the door, with no electrical connection. Where a spec calls for Grade 1 on a wired opening, the Grade 2 storeroom locks will not satisfy it.
17) What classroom or storeroom lever should I use on the doors that are not on the access control system?
On an electrified opening the Accentra 4781LN Monroe handles the fail secure function, but the surrounding mechanical doors can take standard keyed cylindrical levers. The Dexter C1000 Grade 1 classroom lever and Grade 1 classroom security lever are both clutching and keyed for 1-3/8 inch to 1-3/4 inch doors. The Cal-Royal AG03 is a Grade 2 classroom lever with a 6-pin Schlage C keyway keyed different and a 2-3/4 inch backset, which matches the 2-3/4 inch standard backset of the 4700LN chassis.
18) What finishes does the Accentra 4781LN Monroe lever come in?
Bright brass 605, satin brass 606, satin bronze 612, dark oxidized satin bronze 613E, bright chrome 625, satin chrome 626, plus Black Suede and White Suede powder coat. The powder coat options are useful when you are matching storefront or painted frames rather than plated hardware, and each finish is available in either voltage.
19) Can I match the Accentra 4781LN with non-functioning trim on the inactive leaf of a pair?
Yes - the inactive leaf takes dummy trim, not a working lockset. The BEST 9K Series 1DT is a Grade 1 heavy duty single dummy trim cylindrical lever, and the BEST 7KC Series 1DT is the Grade 2 medium duty equivalent. Emtek also offers dummy pairs in the Arts and Crafts and Cortina levers, and Baldwin Estate 5103 half dummies are handed, ordered left or right. The lever design will not match the Accentra Monroe lever, so for visual consistency across a pair of doors confirm the trim style before ordering.
20) I am specifying hardware for a residential building - is the 4781LN the right choice or is there a lighter option?
The Accentra 4781LN Monroe is a commercial Grade 1 electrified cylindrical lever built for wired access control openings. For interior residential doors with no access control, lighter options include the Kwikset 200BRNL Breton Grade 3 passage lever and the 300BRNL Breton Grade 3 privacy lever, both for 1-3/8 inch to 1-3/4 inch doors, the Callan Asheville Grade 3 passage lever, and the Master Lock BC Series Grade 3 keyed entry lever. These are mechanical, non-electrified, and lower grade than the 4781LN.
21) Is the Corbin Russwin 585F715 lever a replacement part for the 4781LN?
No. The Corbin Russwin 585F715 is a Grade 1 lock lever for the ED8000 pushpad exit device and the CL3300 cylindrical lock series, listed for 1-3/4 inch to 2 inch doors - it is lever trim for those Corbin Russwin platforms, not a complete lock. The Accentra 4781LN Monroe is a full electrified cylindrical lever lock with its own chassis and Monroe lever. The two do not interchange.
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Does the Accentra MO-4781LN-626 12V come with a warranty?
Absolutely. The Accentra MO-4781LN-626 12V is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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