Corbin Russwin ML20906 Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,977.69
$1,157.99
Corbin Russwin ML20906 Single Cylinder Mortise Electrified Lever Lockset, PS-Princeton (Cast) Lever

Corbin Russwin ML20906 Grade 1 Single Cylinder Mortise Electrified Lever Lockset, PS-Princeton (Cast) Lever

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Model: ML20906-PSA-626-SAF
From the ML2000 Series Collection
$1,977.69
$1,157.99
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In Stock (leaves warehouse same day if ordered before 3pm ET)

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Corbin Russwin ML20906-PS Single Cylinder Mortise Electrified Lever Lockset with Princeton Cast Lever, ANSI/BHMA Grade 1, EcoFlex Technology

Commercial-Grade Electrified Mortise Security for High-Traffic, Demanding Environments

The Corbin Russwin ML20906-PS is a Single Cylinder Mortise Electrified Lever Lockset from the ML2000 Series, featuring the Princeton (Cast) lever design and built to meet the rigors of high-traffic, abusive environments. Certified to ANSI/BHMA A156.13, Series 1000, Operational and Security Grade 1, this heavy-gauge steel mortise lock accommodates door thicknesses from 1-3/8" to 4" with a standard door thickness of 1-3/4" and a standard backset of 2-3/4". Featuring Fail Safe/Fail Secure operation and Motorized Electric Latch Retraction (MELR), the ML20906-PS integrates seamlessly with access control platforms and Corbin Russwin key systems including the patented Access 3® and Pyramid high-security systems. UL listed, UL10c compliant, and ULC listed, this lockset is 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
  • Educational Facilities
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Behavioral Health and Secure Care Facilities

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locksets are engineered from heavy-gauge steel and certified to ANSI/BHMA A156.13, Series 1000, Operational and Security Grade 1 — far exceeding minimum grade requirements for durability and longevity in demanding commercial environments. The ML20906-PS is backed by a ten-year mechanical warranty, a five-year MELR warranty, and a two-year electrical warranty, along with UL, ULC, UL10c, ADA, ASTM E330, and Florida Building Code Windstorm certifications. With EcoFlex® technology delivering up to 89% energy savings and a field-reversible latchbolt for simplified installation, Corbin Russwin delivers professional-grade reliability where dependable performance is essential.

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 ML20906-PSA-626-SAF – Frequently Asked Questions

1) What is the difference between fail safe and fail secure on the Corbin Russwin ML20906 electrified mortise lock?
The ML20906 is ordered as either Fail Safe or Fail Secure, and it is a decision you make on the order, not a field setting. Fail safe means the outside lever unlocks when power drops, which is what you want on a stair or egress-side opening where people have to get out or firefighters have to get in. Fail secure keeps the opening locked when power drops, which is normal for a storeroom, IT room, or exterior perimeter door. Pick per opening based on your fire and life safety plan, then match it to the power supply behavior.
2) Will the Corbin Russwin ML20906 mortise lock fit a 1-3/4 inch door with a 2-3/4 inch backset?
Yes. 1-3/4 inches is the standard door thickness for the ML20906 and the backset is 2-3/4 inches, which is the standard commercial mortise backset. The steel lockcase measures 5-7/8 x 4 x 15/16 inches, so the door needs a mortise pocket cut to that ANSI prep. Corbin Russwin also offers optional thicknesses on the ML2000 series for doors from 1-3/8 up to 4 inches.
3) Do I have to specify handing when ordering an ML20906 mortise lockset?
The latchbolt is field reversible, so handing can be corrected on the job. Corbin Russwin calls it a Quick Reversible latchbolt, and it re-hands without opening up the lock case. The lock still ships handed, so tell us the hand you need, but a mis-hand at the door is not a return.
4) Will the ML20906 latch into the strike already in my frame?
The two-piece anti-friction latchbolt throws 3/4 inch (19mm) and the supplied strike is an ANSI straight lip with 1-1/8 inch lip to center, 4-7/8 x 1-1/4 inches overall. If your frame already has a standard ANSI 4-7/8 inch strike cutout with the same lip-to-center, the latch lines up. If the existing lip to center is different because of a deeper stop or a rabbeted frame, order the strike to match rather than reusing the old one. There is also a 9/16 inch deadlocking auxiliary latch that has to land on the strike face.
5) Can the Corbin Russwin ML20906 be used on a 3-hour fire rated door?
Yes. The ML20906 is UL and cUL listed, UL10C positive pressure, and rated for fire doors up to and including a 3-hour rating, to 4 x 10 feet single or 8 x 10 feet pair. It also carries ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1, ADA A117.1, California State Fire Marshal, and windstorm/hurricane certification. Note that on a fire door, fail safe operation has to be coordinated with the fire alarm so the door still latches under alarm.
6) How do I order the ML20906 to match an existing Corbin Russwin master key system?
Four keying choices are offered: a C 6-pin cylinder in L4 keyway, L4 keyway, IC 6-pin less core, and less cylinder. If your building is on a Corbin Russwin small format interchangeable core system, take IC 6-pin less core and drop in your own cores. If the site uses another manufacturer's cylinder, order less cylinder, since the ML2000 accepts most other manufacturers' cylinders. The standard brass cylinder is 6-pin L4 and ships 0-bitted, and the lock can be put on new or existing Corbin Russwin systems including the patented Access 3 and Pyramid high-security systems.
7) Can a standalone electronic mortise lock replace the Corbin Russwin ML20906-PS?
Only if the door does not have to answer to a central access control panel. The ML20906 is a wired Fail Safe/Fail Secure lock with Motorized Electric Latch Retraction that ties into an access control platform. Standalone alternatives carry their credentials on board: the Alarm Lock DL3500CR is a Grade 1 electronic mortise lock with 300 user codes and classroom function for 1-5/8 to 1-7/8 inch doors, the Schlage CO-100-MS Grade 1 keypad mortise lock is privacy function for 1-3/4 inch doors, and the TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID for 1-3/4 inch doors. Note the Alarm Lock door thickness range differs from the 1-3/4 inch standard the ML20906 is built around.
8) If the opening does not need electrification, what mortise lock should be used instead of the ML20906-PS?
For a mechanical opening, pick a Grade 1 mortise lock in the function the door actually needs. The Accentra 8805FL is a Grade 1 storeroom mortise lock from the 8800 series, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. For classroom, the Cal-Royal NM8070 is Grade 1 on 1-3/4 inch doors; for office or entrance, the NM8050. The ML20906 is specifically a Fail Safe/Fail Secure electrified lock intended to run with access control, so the mechanical models drop the wiring and the power supply from the job.
9) Is a wireless mortise lock an alternative to the ML20906-PS for a retrofit where running wire is difficult?
Yes, that is the usual reason to move off a hardwired lock. The Schlage LEMD-GRW is a Grade 1 ENGAGE series wireless mortise lock with a 125kHz proximity reader and a 3 hour fire rating, and the Alarm Lock DL1300NW is a Trilogy Networx wireless electronic mortise lock with keypad for Adams Rite deadlatches. The ML20906 stays the choice when the opening needs true latch retraction under panel control, since it uses Motorized Electric Latch Retraction and is offered with request-to-exit monitoring.
10) What is MELR on this Corbin Russwin lock and how is it different from a solenoid electric latch retraction?
MELR is Motorized Electric Latch Retraction, and it is what the ML20900 series uses to pull the latch back on command from an access control system. The motor draws current only while it is moving, which is where the EcoFlex claim of up to 89% energy savings comes from, versus a solenoid that holds current the whole time it is energized. Practically, that means a smaller power supply and less heat in the lock case on an opening that gets cycled all day. The lock is tested to 14.5 million cycles.
11) Can I get request-to-exit monitoring on the ML20906, and do I need it?
Request to exit is an ordering option on the ML20906, yes or no. Order it Yes when the access control system has to know the inside lever was turned, which is typical where you need to shunt a door alarm on legitimate egress or log free egress on a monitored perimeter or stair door. If the lock is only being remotely released and the door position switch covers your monitoring, No keeps the wiring simpler.
12) Should I pick a rose or an escutcheon trim on the ML20906, and what are the options?
Five trim choices: A rose, B rose, or M, N, or R escutcheon, all with the PS Princeton cast lever in 626 satin chrome. Roses are the cleaner look and the usual pick when you are matching sectional trim already on the floor. Escutcheon trim covers more of the door face, which helps when you are replacing an older lock that left marks or prep, and it is the trim family Corbin Russwin offers status indicators on. All trim is thru-bolted for alignment and security. Whichever you choose, keep it consistent across an opening group so the building reads uniform.
13) What are the cylinder and thumbturn spacing dimensions for the ML20906 escutcheon prep?
Center to center from the lever to the cylinder is 3-5/8 inches (92mm), and lever to thumbturn is 2-7/16 inches (62mm). The armored front is 8 x 1-1/4 inches in wrought brass, bronze, or stainless. Those are the numbers to check against an existing door face prep before you assume a drop-in on a retrofit.
14) What electrified mortise lock can I use instead of the Corbin Russwin ML20906?
Two straight alternatives we carry. The Schlage L9092EU with 03A trim in 626 is an electric lock/unlock outside lever mortise lock, keyed outside, with request to exit, 12/24VDC, heavy duty, for a 1-3/4 inch door, so it covers the same corridor style opening with electric control on the lever rather than latch retraction. The Command Access ML190 Series motorized mortise lock is the closer match on operation, heavy duty and field selectable EL/EU with 24VDC power, so one lock body can be set to either fail safe or fail secure in the field instead of being ordered one way. If you need no electrification at all, the BEST 45HW wired electromechanical mortise lock runs 12V or 24V and is heavy duty.
15) What looks like a substitute for the ML20906-PS mortise lockset but is not?
Several mortise-family items are not complete electrified locksets. The BEST 45H and 45HCA are heavy duty mortise lock bodies only, public entrance and intruder function, with no trim. The Sargent 130KB and 130W are mortise thumbturns, and the Sargent 4874 is a double cylinder mortise deadbolt on a 2-3/4 inch backset with no latch or lever. The Schlage L0170 and the Emtek 3102 Memphis are dummy trim with no latching function at all. The ML20906 is a complete single-cylinder electrified lever lockset with a 3/4 inch latchbolt and ANSI straight lip strike.
16) For a behavioral health or ligature-resistant opening, what should be specified instead of the ML20906-PS?
TownSteel's anti-ligature mortise locksets are built for that opening: the MRX-L-01 is a Grade 1 heavy duty stainless steel anti-ligature lever mortise lockset, passage function, for 1-3/4 inch doors, and the MRX-A-01 is the same passage function with satin stainless ligature-resistant arch trim. The Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset, ligature resistant and ADA compliant in satin stainless steel. The ML20906 is offered with Behavioral Health trim options in the ML2000 trim range, but the TownSteel and Marks units are passage function rather than electrified Fail Safe/Fail Secure.
17) How does the ML20906-PS compare with a Grade 2 electronic mortise lock like the Schlage LE series?
The Schlage LEBMB-ADD is a Grade 2 mobile-enabled mortise lock with push button and LED covering privacy, office and apartment functions on 1-3/4 inch doors with a 3 hour fire rating, and the Dormakaba Saffire LX-I-M002 is a BHMA Grade 2 electronic RFID mortise lockset with BLE mobile access. The ML20906 is certified to ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1, so for a high-traffic opening carrying a Grade 1 spec the Corbin Russwin is the one that meets it.
18) Is the ML20906 durable enough for a heavy traffic entrance in an apartment building or school?
It is built for that. The lock case is heavy-gauge steel, the certification is ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1, and Corbin Russwin lists 14.5 million UL cycles on it. The deadbolt is one-piece stainless with a 1 inch throw, and the anti-friction two-piece latch takes less force to close, which matters on a door with a closer that people slam. Typical uses are commercial offices, schools, healthcare, government, retail, industrial, and behavioral health.
19) If I standardize on the ML2000 body across a building, can I change lock functions later?
Within the ML2000 family, twelve functions are configurable from one ML2054 lockbody, which is why facilities buy this series when they want one spare on the shelf covering several openings. That flexibility is on the mechanical body; the ML20906 as ordered is the electrified single cylinder version and its fail safe or fail secure behavior is set by which one you order.
How fast can I get the Corbin Russwin ML20906-PSA-626-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 ML20906-PSA-626-SAF come with a warranty?
Absolutely. The Corbin Russwin ML20906-PSA-626-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 ML20906-PSA-626-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 ML20906-PSA-626-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.

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