Corbin Russwin ML20906 ASN SEC Electrically Controlled Mortise Lock - Fail Secure - ASN Lever

The Corbin Russwin ML20906 is the access-control-ready variant of the industry standard ML2000 Series mortise lock, purpose-built for commercial and institutional openings where remote locking from a card reader, relay, or security panel is a requirement. It brings the same heavy-gauge steel construction and ANSI/BHMA Grade 1 performance that facilities managers have specified on the ML2000 for decades, with a factory-integrated solenoid that adds fail safe or fail secure electrical operation without requiring a non-standard door preparation.

If your building has a pharmacies corridor, a tenant-controlled suite entry, a computer room, or any high-security opening that needs to stay locked until actively unlocked by your access control system, the ML20906 is the correct specification.

SAF vs. SEC: Choosing the Right Electrical Mode Before You Order

Both the Corbin Russwin ML20906 SAF and the ML20906 SEC are available on American Locksets. Here's what each one actually does:

ML20906 SAF (Fail Safe): Power on = outside grip locked. Power off = outside grip free. The door unlocks automatically on a power failure. Correct specification for egress corridors, stairwells, and fire-rated openings where life safety codes require free exit when power drops.

ML20906 SEC (Fail Secure): Power off = outside grip locked. Power on = outside grip operates. The door stays locked through any power failure. Correct specification for pharmacies, server rooms, evidence rooms, tenant suites, and any opening where an outage must not grant access.

In both configurations the inside grip is always free. Egress is never compromised.

Full Technical Specifications

• Standards: ANSI/BHMA Grade 1 — designed for high-traffic and abusive environments

• Lockcase: Heavy-gauge chrome plated steel, 5-7/8" x 4" x 15/16"

• Backset: 2-3/4" (70mm)

• Door thickness: 1-3/4" (44mm) standard

• Latchbolt: 2-piece mechanical with anti-friction insert, 5/8" x 1" x 3/4" throw — quick reversible, re-handed without disassembling the lock case

• Auxiliary latchbolt: 9/16" effective throw, deadlocks the latchbolt

• Front: Heavy-gauge steel, 8" x 1-1/4" x 3/32", accommodates flat and beveled doors

• Cylinder: 6-pin brass, L4 keyway standard; 7-pin and interchangeable core (IC) options available

• Strike: Wrought brass, bronze or stainless steel, ANSI straight lip, 4-7/8" x 1-1/4"

• Electrical: 12/24VDC at 15mA continuous; peak current draw 0.5A (maximum 2 locks per 1A power supply)

• Operating voltage tolerance: Not to exceed +/- 10%

• Warranty: Ten-year limited

Monitor Options: M91 and M92

These are the two add-on monitoring switches that buyers frequently search for and no competitor describes clearly:

M91 Latchbolt Monitor: A SPDT switch that monitors full extension of the main latch. Use this when your access control panel needs to confirm the door is properly latched and not being held open.

M92 Request to Exit Monitor: A SPDT switch triggered by activation of either inside or outside trim. Both levers activate the switch. Use this to shunt door alarms during authorized exits rather than triggering false alarms on every egress.

Cylinder and Keyway Options Available at Order

The ML20906 ships with a conventional 6-pin cylinder and L4 keyway as standard. At checkout you can configure: keyway (standard L4 or alternate), keying (keyed different, master keyed, construction master keyed), and cylinder type including interchangeable core (IC) for facilities running a managed key control program. Optional wide front (D138) is also available for 1-3/8" doors.

Typical Applications

• Pharmacy dispensaries and controlled substance storage

• Computer rooms, server closets, and data centers

• Tenant space entries in commercial office buildings

• Government facilities and secured government offices

• Hospitals, healthcare corridors, and procedure rooms

• High-security academic buildings and residence halls

Why Order from American Locksets?

American Locksets carries the complete Corbin Russwin ML20906 series including both SAF and SEC configurations, in stock through authorized ASSA ABLOY distribution. Free shipping on all orders over $300. Same-day shipping available. We accept Google Pay, Apple Pay, and PayPal. For keyway questions, IC core compatibility, or function configuration, call 877-471-4870.