Corbin Russwin ML20900 Mortise Lock Body Only

Key Features

• Heavy-gauge steel lock body ensures Grade 1 strength and extended durability.
• Quick reversible handing, field reversible without lockcase disassembly for easy modifications.
• Standard 2-3/4" backset, suitable for door thicknesses from 1-3/4" and up.
• Electrified models include an integrated solenoid for both fail-safe and fail-secure wiring.
• Anti-friction latchbolt with auxiliary latch for smooth operation and enhanced security.
• UL listed for fire-rated doors, with optional mechanical cylinder override.
• Corrosion-resistant, chrome-plated internal components and armored front for durability.
• EcoFlex® technology reduces energy consumption by up to 96%, lowering operational costs.
  
  

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Applications and Advantages

The Corbin Russwin ML20900 mortise lock body is designed for commercial buildings, hospitals, universities, and government facilities, offering:

• Seamless compatibility with mechanical or electronic access control systems.
  
  
• Easy retrofit to existing mortise preps for simplified upgrades.
  
  
• Remote locking/unlocking for restricted or monitored environments.
  
  
• Field-configurable for fail-safe or fail-secure functionality.
  
  
• Long lifecycle, vandal resistance, and enhanced code compliance.
  
  

Warranty

• Ten-year limited warranty on mechanical ML2000 and ML20900 mortise locksets.
  
  
• Two-year limited warranty on all electronic components.
  
  

Electrical Specifications (Fail Safe / Fail Secure)

• Operating Voltage: 12/24VDC @ 15mA continuous
  
  
• Peak Current Draw: 0.5A (max. 2 locks per 1A power supply)
  
  
• Monitor Switch Rating: 2A @ 24VDC
  
  
• Operating Voltage Tolerance: ±10%
  
  
• Configuration Options: Fail-safe and fail-secure, field configurable
  
  

These electrical options ensure reliable integration with access control, alarm, and monitoring systems.
Complete wiring details and function charts are available from QualityDoor.com.

Environmental Specifications

• Operating Temperature: -13°F (-25°C) to 151°F (66°C)
  
  
• Operating Humidity: 5% to 95% RH, non-condensing
  
  

Built to withstand harsh environments, the ML20900’s corrosion-resistant components ensure long-term reliability across indoor and semi-exposed installations.

Monitor Options (ML2000 and ML20900 ECL Models Only)

• M91 – Latchbolt Monitor: SPDT switch monitors full latchbolt extension for security verification.
  
  
• M92 – Request to Exit (REX) Monitor: SPDT switch monitors trim activation; both levers trigger the switch.
  
  

These monitoring options provide door status feedback and egress tracking in integrated access control systems.
Consult QualityDoor.com for model compatibility and wiring diagrams.

Certification and Compliance

• ANSI/BHMA A156.13, Series 1000, Operational & Security Grade 1 certified.
  
  
• Meets A117.1 Accessibility Code for barrier-free design.
  
  
• UL/cUL Listed for A-label and lesser-class doors, single (4' x 10') or pair (8' x 10').
  
  
• UL1034 Compliant for burglary-resistant electric locking mechanisms.
  
  
• California State Fire Marshal Title 19 compliant, levers return to within ½” of door face.
  
  

Fire Door Notice:
Any retrofit or modification to a fire-rated opening may affect its certification. Always consult your local Authority Having Jurisdiction (AHJ) or a code compliance specialist before altering an existing rated door.

Featuring EcoFlex® Technology

The Corbin Russwin ML20900 integrates EcoFlex® Technology, delivering superior energy efficiency and system flexibility:

• Up to 96% energy savings, certified by GreenCircle.
  
  
• Reduced load on power supplies, supporting LEED energy credits.
  
  
• Field-configurable fail-safe/fail-secure modes for installation flexibility.
  
  
• Operates at 12–24VDC, simplifying wiring and reducing voltage drop risk.
  
  
• Longer cable runs are possible without performance loss.
  
  
• Reduced total cost of ownership through lower energy use and maintenance.
  
  

EcoFlex-equipped models are available now at QualityDoor.com, offering advanced sustainability benefits alongside top-tier access control performance.

Why Buy from QualityDoor.com

At QualityDoor.com, we provide authentic Corbin Russwin ML20900 mortise lock bodies backed by expert support and fast nationwide delivery.
Our team helps builders, contractors, and facility managers choose the right electrified or mechanical lock configuration to meet security, compliance, and performance requirements.

Shop confidently with QualityDoor.com, your trusted source for Corbin Russwin commercial hardware, technical guidance, and unbeatable service.