Corbin Russwin ML20907 Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,884.38
$1,104.45
Corbin Russwin ML20907 No Cylinder Mortise Electrified Lever Lockset, DS-Dirke Lever

Corbin Russwin ML20907 Grade 1 No Cylinder Mortise Electrified Lever Lockset, DS-Dirke Lever

(No reviews yet) Write a Review

Model: ML20907-DSA-626-RH-SAF
From the ML2000 Series Collection
$1,884.38
$1,104.45
Selected Finish is
Selected Available Knob/Lever Style is
Selected Rose/Escutcheon is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,884.38
$1,104.45
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Corbin Russwin ML20907-DS ML2000 Series Mortise Electrified Lever Lockset with Dirke Lever, Fail Safe/Fail Secure, ANSI/BHMA Grade 1

Commercial-Grade Electrified Mortise Lockset with Motorized Electric Latch Retraction

The Corbin Russwin ML20907-DS is part of the ML2000 Series, an ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1 mortise electrified lever lockset featuring the DS-Dirke lever design. Built from heavy-gauge steel and engineered for high-traffic, abusive environments, this lockset supports Fail Safe/Fail Secure operation and accommodates door thicknesses from 1-3/8" to 4" with a standard backset of 2-3/4". It features Motorized Electric Latch Retraction (MELR) that retracts the latchbolt in ½ second with applied power, and integrates with access control platforms as well as Corbin Russwin key systems including patented Access 3® and Pyramid. The unit is UL listed, UL10c compliant, ULC listed, ADA compliant, and rated for use on fire doors up to and including 3-hour fire ratings.

Professional Features & Benefits

  • ANSI/BHMA Grade 1 mortise lock per A156.13 Series 1000, Operational and Security Grade 1
  • UL Cycle above and beyond: 14.5 Million Cycles (Verification ID: V875753)
  • Patented Quick Reversible latchbolt — reverse handing without disassembling the lock case
  • Multi-function capability: 12 functions configurable from one ML2054 lockbody
  • Heavy-gauge steel lockcase 5-7/8" x 4" x 15/16"; 1" stainless steel deadbolt, 1" throw
  • 3/4" (19mm) throw anti-friction two-piece latchbolt requires less force to close
  • Wide variety of trim designs including Muséo®, Vineyard™, Behavioral Health (BHSS/BLSS)
  • Status indicator options for locked/unlocked visibility (sectional and escutcheon trim)
  • Motorized Electric Latch Retraction (MELR) available for ML20900 series
  • Thru-bolted trim designs for proper alignment and increased security
  • Can be used with new or existing Corbin Russwin key systems; accepts most other manufacturers' cylinders
  • UL/cUL listed, UL10C positive pressure; 3-hour fire door up to 4' x 10' single or 8' x 10' pair
  • Ten-year mechanical warranty; five-year MELR; two-year electrical

Technical Specifications

  • Grade: ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1
  • Handing: Handed; quick reversible — re-handed without disassembling the lock case
  • Door Thickness: 1-3/4" (44mm) standard; optional thicknesses available
  • Backset: 2-3/4" (70mm)
  • Lockcase: Heavy-gauge steel, 5-7/8" (149mm) x 4" (102mm) x 15/16" (24mm)
  • Armored Front: Wrought brass, bronze, or stainless steel, 8" x 1-1/4"
  • Latchbolt: 2-piece mechanical with anti-friction insert, 5/8" x 1" x 3/4" (19mm) throw
  • Auxiliary Latchbolt: 9/16" (14mm) effective throw; deadlocking
  • Deadbolt: One-piece stainless steel, 19/32" x 1-1/4" x 1" (25mm) throw
  • Strike: Wrought brass, bronze, or stainless steel, ANSI straight lip, 4-7/8" x 1-1/4" x 1-1/8" lip to center
  • Cylinder: Brass, 6-pin L4 keyway, 0-bitted standard
  • Spacing: C. to c. knob/lever to cylinder: 3-5/8" (92mm); knob/lever to thumbturn: 2-7/16" (62mm)
  • Certifications: ANSI/BHMA A156.13 Grade 1; UL/cUL UL10C 3-hour positive pressure; ADA A117.1; California State Fire Marshal; Windstorm/Hurricane certified
  • Warranty: Ten-year mechanical; five-year MELR; two-year electrical

Professional Applications

  • Commercial Office Buildings
  • Healthcare Institutions and Behavioral Health Facilities
  • Educational Facilities and Campus Buildings
  • Government and Municipal Buildings
  • Retail Establishments and Mixed-Use Properties
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential and Hospitality Properties

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locksets are constructed of heavy-gauge steel and engineered to far exceed ANSI/BHMA A156.13 Series 1000 Grade 1 requirements, ensuring durability and longevity in the most demanding high-traffic and abusive environments. The ML20907-DS is backed by a ten-year mechanical warranty, a five-year MELR warranty, and a two-year electrical warranty, reflecting Corbin Russwin's commitment to long-term reliability. With UL listing, UL10c compliance, ADA compliance, and a 3-hour fire door rating, this electrified mortise lockset delivers professional-grade security and access control performance for critical commercial applications.

Product Specs

Subcategory:
Mortise Locks
Product Group:
Mechanical Locks
Series:
ML2000 Series
Standard Latch:
3/4" Latchbolt
Standard Strike:
ANSI-Straight Lip,1-1/8" (29mm) Lip to Center
Product Subgroup:
Mortise Lockset
Product Type:
Mortise Locks
Commercial/Residential:
Commercial
Lock Type:
Mortise
Lock Function:
Fail Safe/Fail Secure
Product Model:
ML20906
Collection:
ML2000 Series
Product Function:
Fail Safe/Fail Secure
Door Hand Direction:
Field Reversible
Door Thickness Range:
1-3/4"
Product Substrate:
Steel
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

Corbin Russwin ML20907-DSA-626-RH-SAF – Frequently Asked Questions

1) What is the difference between ordering the ML20907 as fail safe versus fail secure?
Both operating modes are orderable on the ML20907. Fail safe means the outside lever unlocks when power is removed, which is what you want on a stair-return or egress-path opening covered by a fire alarm release. Fail secure keeps the outside lever locked when power drops, which is the normal choice for a storeroom, IT room or perimeter opening where the door must stay secure through an outage. Free egress from the inside is unaffected either way. Pick the mode on the order; it is a function option, not a field setting.
2) Can I reuse my existing mortise strike with this Corbin Russwin lock?
The ML20907 uses an ANSI straight lip strike, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center. The latchbolt is a two-piece anti-friction type with a 3/4 inch throw, plus a 9/16 inch deadlocking auxiliary latch, and the deadbolt throws 1 inch. If your frame already carries an ANSI 4-7/8 inch strike with matching lip-to-center, the latch will engage without cutting new frame prep. A T-strike or a non-ANSI lip will need to be changed out.
3) Is the Corbin Russwin ML20907 approved for a 3-hour fire rated opening?
Yes. The ML20907-DS is UL and cUL listed and UL10C positive pressure compliant, rated for fire doors up to and including 3 hours, covering single doors to 4 ft by 10 ft and pairs to 8 ft by 10 ft. It is ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1, meets ADA A117.1, and carries California State Fire Marshal and windstorm/hurricane certification.
4) What is the closest electrified mortise lock to the Corbin Russwin ML20907-DS from another manufacturer?
The Corbin Russwin ML20907-DS is an electrified mortise lever lockset with Fail Safe/Fail Secure operation. The closest cross-brand equivalents are the Schlage L9092EU 03A electric lock/unlock outside lever mortise lock, which is keyed outside with request-to-exit and runs on 12/24VDC on 1-3/4 inch doors, and the BEST 45HW wired electromechanical mortise lock with 12V/24V operation in a heavy duty lockbody. All three are electrified mortise bodies intended to be driven by an access control system rather than standalone keypads.
5) If I need electric latch retraction but want a field-selectable fail safe or fail secure body, what else is there?
The Corbin Russwin ML20907-DS uses Motorized Electric Latch Retraction and is ordered as either Fail Safe or Fail Secure. The Command Access ML190 series motorized mortise lock is the comparable option where the EL/EU operation is field selectable on 24VDC, in a heavy-duty storeroom function body. Choose the Corbin Russwin if the opening is being built around a Corbin Russwin key system and trim, and the ML190 if you want to set the electrical mode at the door.
6) We do not have a card reader or power at the door. What mortise lock should we use instead of the ML20907?
The ML20907-DS is an electrified mortise lock that needs power run to the door and a controller to switch it. For an opening with no wiring, standalone battery or keypad mortise locks cover the same door prep: the Alarm Lock DL3500CR Trilogy is a Grade 1 electronic mortise lock with 300 user codes in a classroom function, the Schlage CO-100-MS-40-KP is a heavy duty Grade 1 standalone electronic mortise lock with a keypad reader in privacy function, and the BEST 45HZ EZ series is an electronic keypad mortise lock with key override.
7) What looks like an ML20907 substitute but will not work on a 1-3/4 inch commercial door?
Several mortise locks in the same family will not drop into the same opening. The ML20907-DS carries a 2-3/4 inch backset on 1-3/4 inch doors. The Baldwin 6310 and 6301 mortise lock bodies use a 2-1/2 inch backset, the Alarm Lock DL2700CR and DL3500CR are built for 1-5/8 to 1-7/8 inch door thickness, and the Marks USA 21AC and 22AC ornamental iron locks are for 1 inch doors. The Codelocks CL2255 is a medium duty electronic tubular mortise latch rather than a heavy mortise case.
8) What else could I use instead of the Corbin Russwin ML20907 if I need an electrified mortise lock?
A couple of directions. The Schlage L9092EU with 03A trim is the closest wired equivalent, an electrically unlocked mortise lock with keyed outside, request-to-exit and 12/24VDC operation for 1-3/4 inch doors. The BEST 45HW is a wired electromechanical mortise lock running 12V or 24V. If you want field-selectable fail safe versus fail secure at the door instead of at the order, the Command Access ML190 Series is a motorized mortise lock with selectable EL/EU operation on 24VDC. Where you would rather have credentials at the door than a wired access control run, the TownSteel FME-2000 or Schlage LEMD ENGAGE wireless mortise lock put the reader in the lock itself.
9) Do I need to order the ML20907 handed, or can I flip it in the field?
Handing is field reversible. The ML2000 lock body uses a patented quick reversible latchbolt, so the latch can be turned without taking the case apart on site. The orderable configurations are shown as right-handed, and you re-hand at the door if the opening turns out to be the other way.
10) What does Motorized Electric Latch Retraction do on this lock, and is it different from a solenoid electric latch?
MELR on the ML20907 pulls the latchbolt back with a motor rather than a solenoid, retracting it in about half a second once power is applied. Practically, that means the door can be released remotely from the access control system and pushed open with no handle turn, which suits automatic operators, vestibules and high-use main entrances. Motor drive also draws less continuous current and runs quieter than a solenoid latch retraction device.
11) Should I add request-to-exit monitoring when I order this electrified mortise lock?
Request-to-exit is an orderable option on the ML20907, yes or no. Add it when the access control head end needs to know the inside lever was turned, so the system can shunt the door contact and avoid a forced-door alarm on legitimate egress. Skip it on openings with no monitored door position switch. It has to be specified at the time of order; it is not a field add.
12) What trim choices do I pick from on the ML20907 with the Dirke lever?
Trim is ordered as either a rose (A) or one of two escutcheon styles (M or N), all with the DS Dirke cast lever. Finishes are 625 bright chrome and 626 satin chrome. Trim is thru-bolted for alignment and pull-off resistance. If you are matching existing openings in a building, note whether the doors currently wear a round rose or a full escutcheon plate, since the plate size changes what the old prep will hide.
13) I only need a mechanical mortise lock on this door, no power. Is the ML20907 overkill?
Yes, it is. The ML20907 is an electrified lock built to be driven by an access control system with motorized latch retraction; on an opening with no power run it gives you nothing. For a straight mechanical Grade 1 mortise lock, look at a storeroom function like the Accentra 8805FL or Cal-Royal NM8080, a classroom function like the Cal-Royal NM8070, or an office/entrance function like the Cal-Royal NM8050. All are Grade 1 and the Cal-Royal bodies are specified for 1-3/4 inch doors, same as this one.
14) How far apart are the lever and cylinder holes on the ML2000 trim prep?
Center to center from the knob/lever to the cylinder is 3-5/8 inches (92mm), and knob/lever to thumbturn is 2-7/16 inches (62mm). Those are the numbers to check against an existing door face prep if you are swapping into holes that are already bored, since an escutcheon will cover minor variance but the cylinder hole itself has to line up.
15) Is a mechanical Grade 1 mortise lock a valid substitute for the ML20907-DS?
Only if the opening does not need to be controlled electrically. The ML20907-DS is an electrified body with Fail Safe/Fail Secure operation. If the door is simply keyed, straight mechanical Grade 1 mortise locksets include the Accentra 8805FL storeroom lock in the 8800 series with an Arcadia lever, the Cal-Royal NM8080 storeroom mortise lockset with an interchangeable core option on 1-3/4 inch doors, and the Cal-Royal NM8050 office/entrance lockset with auxiliary deadlatch. None of those accept an access control signal.
16) We want credential access at the door rather than a hardwired lock. What mortise options read cards or mobile?
The ML20907-DS is switched by an access control system through its electrified body rather than reading credentials itself. If you want the reader in the lock, the Schlage LEMD-GRW is a Grade 1 ENGAGE wireless mortise lock with a 125kHz proximity reader and mobile capability, the TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID on 1-3/4 inch doors, and the Dormakaba LX-I-M002 Saffire is an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2.
17) The ML20907 is ordered without a cylinder. What comparable mortise locks come keyed or with override built in?
The ML20907-DS ships as a no-cylinder body and accepts Corbin Russwin key systems including Access 3 and Pyramid as well as most other manufacturers' cylinders. If you would rather buy the cylinder function as part of the lock, the Schlage L9092EU 03A is keyed outside, the Cal-Royal NM8080 storeroom lockset offers an interchangeable core option, and the Accentra NTM623-NR nexTouch Generation 3 mortise lock includes cylinder override with a capacitive touchscreen keypad.
18) Does the ML20907-DS suit a behavioral health opening, or is there a better choice?
The ML20907-DS is offered with Behavioral Health trim options in the ML2000 line, but if the requirement is an anti-ligature body rather than an electrified one, the TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in passage function for 1-3/4 inch doors, the MRX-A-01 is the same in a ligature resistant arch trim, and the Marks USA MAR5PDN is a Grade 1 ligature resistant hospital passage push/pull paddleset. Those are non-electrified and will not take an access control signal.
19) For a classroom security opening, should I specify the ML20907 or a dedicated classroom mortise lock?
The ML20907-DS is an electrified Fail Safe/Fail Secure body, so classroom lockdown would be handled by the access control system. If the school wants lockdown at the door, the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset with an ANSI strike and steel escutcheon for 1-3/4 inch doors, the Cal-Royal NM8070 is a Grade 1 classroom mortise lockset with auxiliary deadlatch, and the TownSteel FME-4000 is an electronic intruder classroom mortise lockset with RFID.
20) Which mortise products are not alternatives to the ML20907-DS at all?
The ML20907-DS is a complete electrified mortise lever lockset. Several mortise-labeled items serve other purposes: the Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset and no latch or lever, the Sargent 130KB and 130W are mortise thumbturns only, the Schlage L0170 is half dummy trim, and the Emtek 3102 Memphis and 3104 Hamilton mortise entrance locksets are dummy function. The BEST 45HCA bodies are lockbodies supplied without trim.
21) I need a non-keyed mortise lock on the same door prep as the ML20907. What are the options?
For openings in the same run that only need latching, the Hager 3810S is a Grade 1 passage mortise lock with rose and a 2-3/4 inch backset, matching the 2-3/4 inch backset of the ML20907-DS, with the 3810E the escutcheon version. The Falcon MA101 is a Grade 1 heavy-duty field reversible mortise passage lock with a fire rating, and the Schlage PM010 is a Grade 1 passage latch mortise lock for 1-3/4 inch doors.
22) The ML20907 is field reversible. Which comparable mortise locks also re-hand without a handed order?
The ML20907-DS is field reversible and uses a quick reversible latchbolt that re-hands without opening the lock case. Among comparables, the BEST 45H public entrance mortise lock body is described with field reversible operation, the Falcon MA101 Grade 1 heavy duty passage lock is field reversible, and the Kaba Ilco 185 series mortise locks require no handing. Handed alternatives such as the Schlage LEMD-GRW right hand unit must be ordered to the door swing.
23) How durable is this lockset for a high-traffic entrance?
The ML2000 lock case is heavy-gauge steel and the ML20907 has been cycle tested to 14.5 million cycles (UL Verification ID V875753), well past the ANSI/BHMA Grade 1 requirement. The anti-friction two-piece latchbolt also reduces closing force, which matters on doors that slam thousands of times a week. That makes it a fit for main entries, campus buildings, healthcare corridors and other abusive openings.
24) Can I use one ML2000 lock body across several different door functions in my building?
Largely, yes. The ML2000 platform is multi-function: twelve functions are configurable from a single ML2054 lock body, which lets a facility stock one spare body instead of a shelf full of function-specific locks. Trim choice, cylinder and the electrified option are what differentiate the openings. For behavioral health areas the series also offers BHSS and BLSS ligature-resistant trim, and status indicator trim is available on both sectional and escutcheon designs for locked/unlocked visibility.
How fast can I get the Corbin Russwin ML20907-DSA-626-RH-SAF delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Corbin Russwin ML20907-DSA-626-RH-SAF come with a warranty?
Absolutely. The Corbin Russwin ML20907-DSA-626-RH-SAF is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Corbin Russwin ML20907-DSA-626-RH-SAF?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Corbin Russwin ML20907-DSA-626-RH-SAF from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.

Videos

!