Falcon A7851-12RX-RHR MA851 V ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$900.00
$461.22
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Falcon A7851-12RX-RHR MA851 V Fail Safe Mortise Lock Case with RX Switch, Right Hand Reverse, Field Reversible

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Model: A7851-12RX-RHR

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

$900.00
$461.22
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Falcon A7851-12RX-RHR MA851 V Fail Safe Mortise Lock Case with RX Switch, Right Hand Reverse, Field Reversible

The Falcon MA851 V Fail Safe Mortise Lock Case with RX Switch (model A7851-12RX-RHR) is a commercial-grade replacement lock case engineered for electrified mortise lock applications. Configured for Right Hand Reverse (RHR) installations and featuring field-reversible operation, this lock case provides fail safe functionality, defaulting to the unlocked position upon power loss, making it well suited for access-controlled openings where free egress or entry must be maintained during a power interruption. Note that this lock case does not include an armor front; the armor front must be specified and sourced separately.

Key Features

  • Fail Safe Operation: Designed to default to the unlocked state upon loss of power, supporting life-safety and access control code requirements for controlled openings.
  • Integrated RX Switch: Built-in RX monitoring switch provides door position or lock status signal output for integration with access control systems and building management platforms.
  • Right Hand Reverse (RHR) Configuration: Pre-configured for right hand reverse door handing to streamline installation on compatible openings.
  • Field Reversible: Handing can be reversed in the field, providing installation flexibility and reducing the need for multiple part numbers on varied projects.
  • MA851 V Lock Case Platform: Part of Falcon's MA851 V mortise lock case series, a proven platform for commercial-grade electrified mortise hardware.
  • Armor Front Not Included: Lock case only, armor front must be selected and ordered separately to suit the specific door preparation and finish requirements of the application.
  • Commercial-Grade Replacement Part: Designed as a direct replacement component for compatible Falcon electrified mortise lock assemblies, supporting long-term serviceability in commercial installations.

Technical Specifications

  • Department: Door Hardware
  • Product Category: Mechanical Locks
  • Product Group: Parts and Accessories
  • Subcategory: Parts and Accessories
  • Product Subgroup: Parts and Accessories
  • Product Type: Miscellaneous Hardware
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: A7851-12RX-RHR
  • Features: Falcon Lock Parts

Typical Applications

  • Commercial Office Buildings with Access Control Systems
  • Healthcare Facilities Requiring Fail Safe Egress Compliance
  • Educational Institution Controlled Entry Points
  • Government and Municipal Building Secure Openings
  • Multi-Tenant Commercial Properties with Electrified Mortise Hardware
  • Industrial Facilities with Integrated Door Monitoring Systems
  • Hospitality Properties Utilizing Electrified Mortise Lock Platforms

Why Falcon MA851?

Falcon's MA851 V mortise lock case series is built for the demands of commercial electrified access control, combining fail safe operation with an integrated RX monitoring switch for reliable system integration. The field-reversible design and right hand reverse configuration of the A7851-12RX-RHR reduce on-site labor and parts inventory requirements. As a purpose-built replacement component for compatible Falcon mortise assemblies, it supports the long-term serviceability and performance that commercial facility managers and security integrators depend on.

Manufacturer Resources

Product Specs

Department:
Door Hardware
Product Category:
Mechanical Locks
Product Group:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Miscellaneous Hardware
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
A7851-12RX-RHR
Features:
Falcon Lock Parts

Falcon A7851-12RX-RHR – Frequently Asked Questions

1) Does the Falcon A7851-12RX mortise lock case come with an armor front?
No. The A7851-12RX ships as the lock case only. The armor front has to be ordered separately so it matches your door prep and finish. Budget for that part before the crew shows up, or the case sits in the box.
2) What voltage options does the Falcon MA851 V fail safe lock case come in?
Two: a 12 volt version and a 24 volt version. Match it to the power supply feeding the opening, since the case itself is otherwise the same part.
3) I ordered the right hand reverse version but my door is left hand. Do I need a different part?
No. The Falcon A7851 lock case is field reversible, so the handing can be changed on site. It comes configured right hand reverse out of the box, which saves a step on RHR openings, but you can flip it for the other hand without ordering a second part number.
4) What does fail safe mean on this Falcon mortise lock case, and is it right for my opening?
Fail safe means the lock unlocks when power is lost. On the A7851 that is the default behavior, so the opening frees up during a power interruption. That is what you want on egress paths and access-controlled doors where people must get through with no power. If your opening needs to stay locked when power drops, such as an exterior perimeter door, you want a fail secure case instead, not this one.
5) Is this Falcon lock case a complete lockset or just a replacement part?
Just the case. The A7851 is a commercial-grade replacement component for compatible Falcon electrified mortise assemblies, not a full lockset. You reuse your existing trim, cylinder and strike, and you still need the armor front. If you are building a new opening from scratch, you need the complete mortise lock, not this case.
6) What is the RX switch in the Falcon A7851-12RX for?
The RX is a built-in monitoring switch that sends a status signal back to your access control or building management system, so the head end knows the lock's state. If you do not need monitoring at the door, you do not need the RX variant of the case.
7) Is the Falcon MA851 V lock case rated for commercial traffic or is it a residential part?
Commercial. The MA851 V platform is built for commercial electrified access control work, typical in office buildings, healthcare, schools, government facilities and hotels running electrified mortise hardware. It is not a residential product.
How fast can I get the Falcon A7851-12RX-RHR 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 Falcon A7851-12RX-RHR come with a warranty?
Absolutely. The Falcon A7851-12RX-RHR 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 Falcon A7851-12RX-RHR?
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 Falcon A7851-12RX-RHR 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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