BEST EM303 Electrified Mortise...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,827.00
$1,755.56
BEST EM303 Electrified Mortise Lock with 03 Function Lock Body

BEST EM303 Electrified Mortise Lock with 03 Function Lock Body

(No reviews yet) Write a Review

Model: EM303 FS 630 RHR
$1,827.00
$1,755.56
Selected Finish is

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

$1,827.00
$1,755.56
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

BEST EM303 Electrified Mortise Lock with 03 Function Lock Body

Professional Electric Mortise Lock Solution

The BEST EM303 electrified mortise lock delivers reliable electric lock/unlock functionality with integrated switch monitoring for outside trim status. This handed mortise lock operates at 24VDC with field-reversible fail-secure/fail-safe configuration, providing flexible security control for commercial applications. The precision-engineered lock body features SPDT switch monitoring rated to 2 Amps at 24VDC for comprehensive access control integration.

Professional Features & Benefits

  • Dual Operation Modes: Standard fail-secure operation (trim locked when power off) with field conversion capability to fail-safe mode for adaptable security requirements.
  • Integrated Monitoring: Built-in switch monitors outside trim status (locked/unlocked) with SPDT configuration for real-time feedback to access control systems.
  • 24VDC Operation: Standard 24VDC electrical rating provides reliable power compatibility with most commercial access control systems.
  • Heavy-Duty Switch Rating: Switch rated to 2 Amps at 24VDC ensures dependable monitoring signal transmission under demanding commercial conditions.
  • Handed Configuration: Precision mortise lock designed for handed installation to ensure proper operation and security in specific door configurations.
  • Field-Reversible Security Mode: Fail-secure to fail-safe conversion capability allows on-site adaptation to changing security requirements without hardware replacement.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Fail-Safe/Fail-Secure: Yes
  • Lock Type: Electric Mortise
  • Product Category: Mechanical Locks
  • Product Group: Mechanical Locks
  • Product Subgroup: Mortise Locks and Trim
  • Product Type: Mortise Locks
  • Series: EM303
  • Subcategory: Electric Mortise

Installation & Operation

  1. Verify electrical requirements match available power supply. Confirm 24VDC voltage and current capacity before proceeding.
  2. Disconnect power supply before beginning installation. Follow all applicable electrical codes and safety procedures.
  3. Mount the unit in the specified location ensuring adequate clearance for wiring access, ventilation, and future service requirements.
  4. Route and connect wiring according to manufacturer wiring diagrams. Use appropriate wire gauge and connectors for the application.
  5. Configure operational settings including fail-secure/fail-safe mode per application requirements.
  6. Restore power and test all functions including normal operation, trim monitoring, and integration with connected systems.
  7. Complete final inspection and document settings. Refer to manufacturer documentation for complete wiring diagrams, programming instructions, and troubleshooting.

Professional Applications

  • Commercial Building Security Systems
  • Healthcare Facility Access Control
  • Educational Institution Safety Systems
  • Government and Municipal Buildings
  • Industrial Facility Monitoring
  • Multi-Tenant Residential Properties
  • Emergency Exit Compliance

Why Choose BEST Quality?

BEST EM303 electrified mortise locks deliver professional-grade reliability with precision-engineered components rated for 2 Amps at 24VDC operation. The field-reversible fail-secure/fail-safe configuration and integrated trim monitoring provide comprehensive access control capabilities. Engineered for demanding commercial applications where dependable electronic security performance is essential.

Manufacturer Resources

Precision 2000 Series Catalog

Product Specs

Series:
EM303
Product Group:
Mechanical Locks
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Locks
Subcategory:
Electric Mortise
Commercial/Residential:
Commercial
Lock Type:
Electric Mortise
Fail-safe / Fail-secure:
Yes
Product Category:
Mechanical Locks
Department:
Door Hardware

BEST EM303 FS 630 RHR – Frequently Asked Questions

1) Is the BEST EM303 electrified mortise lock handed, and which hands can I order?
Handing matters on the EM303. It's a handed lock body, ordered as Left Hand Reverse or Right Hand Reverse. Reverse bevel hands are what you get, so confirm the swing on the opening before you order. Get it wrong and the lock won't operate correctly in the door.
2) Does the EM303 lock or unlock when power is lost?
Both, depending on how you order and set it. Standard build is fail-secure, meaning the outside trim stays locked with power off. The EM303 is field-reversible to fail-safe, so the trim unlocks on power loss for egress or fire-alarm release. That conversion happens on site, no replacement lock body. Fail-Safe and Fail-Secure are both orderable configurations.
3) What voltage does the BEST EM303 electric mortise lock run on?
24VDC. Size the access control power supply for 24VDC before you spec it, and check it against what your panel or power supply already delivers on that door. If the building's existing lock circuit is running a different voltage, the EM303 isn't a drop-in on that power.
4) Can the EM303 tell my access control panel whether the door trim is locked or unlocked?
Yes. The EM303 has a built-in switch that monitors outside trim status, locked or unlocked, and reports it back to the access control system. It's an SPDT switch rated to 2 Amps at 24VDC, so you get both a normally open and a normally closed leg to wire into your panel input. That's the feature that separates it from a plain electrified lock body, which just locks and unlocks with no feedback.
5) What is the difference between the standard and fire rated latchbolt monitor switch on the EM303?
The latchbolt monitor switch is a separate order choice on the EM303, offered as Standard or Fire Rated. Pick Fire Rated when the lock is going into a fire door assembly; pick Standard for a normal opening. It's specified at order time, so decide by opening before the order goes in.
6) What is a comparable electrified mortise lock to the BEST EM303 from another brand?
Two close ones. The Schlage 03A electric lock/unlock outside lever mortise lock runs 12/24VDC, is keyed outside, includes request to exit, and is listed for 1-3/4 inch doors as heavy duty corridor function. The Command Access ML190 Series is a motorized mortise lock with field-selectable EL/EU operation on 24VDC, heavy duty, storeroom function. Both share the EM303's core idea, electric control of the outside lever from a panel; the Schlage adds RX signalling, the Command Access uses a motor drive rather than a solenoid.
7) What is the difference between the BEST EM303 and a standalone electronic mortise lock like the Alarm Lock Trilogy or Schlage CO-100?
The EM303 is an electric mortise lock that takes its lock and unlock command from a wired 24VDC access control system and reports outside trim status back to it. Standalone electronic locks carry their own credential reader and user database at the door instead: the Alarm Lock DL3500CR is a Grade 1 Trilogy mortise lock with 300 user codes in classroom function for 1-5/8 to 1-7/8 inch doors, the DL2700CR is a Grade 1 Trilogy T2 classroom mortise lock with weatherproof design over the same door thickness range, and the Schlage CO-100 is a Grade 1 standalone electronic mortise lock with a keypad reader in privacy function for 1-3/4 inch doors. Choose the EM303 when the decision is made by a head-end system, and a standalone when the door manages its own codes.
8) What is a direct alternative to the BEST EM303 electric lock/unlock mortise lock for a 24VDC access control opening?
The Command Access ML190 is the closest match in the mortise electric family: it is a motorized mortise lock with field selectable EL/EU operation on 24VDC, heavy-duty, in a storeroom function. The BEST EM303 is an electric mortise lock with fail-safe and fail-secure both offered, so both give you the electric lock/unlock behavior at the same 24VDC control voltage. The difference is how the mode is set: the EM303 arrives configured per the fail-safe or fail-secure build you order, and the ML190 sets EL versus EU in the field on the same lock body.
9) Which mortise lock should I use instead of the BEST EM303 if the opening needs request-to-exit signalling rather than trim monitoring?
Use the Schlage L9092EU with the 03A electric lock/unlock outside lever and RX. It is an electric lock/unlock outside lever mortise lock, keyed outside, with request to exit, running 12/24VDC on a 1-3/4 inch door, heavy duty, corridor function. The BEST EM303 covers the electric side at 24VDC with a switch monitoring outside trim status rather than an exit signal, and it is ordered handed as left hand reverse or right hand reverse.
10) If the door has no power or wiring run to it, what mortise lock takes the place of a BEST EM303?
A mechanical mortise lockset does the job with no wiring. For a keyed-outside opening, the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset with an interchangeable core option for 1-3/4 inch doors, and the Accentra 8805FL is a Grade 1 storeroom mortise lock with an Arcadia lever in the 8800 Series. For a classroom opening, the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset for 1-3/4 inch doors. The BEST EM303 is the choice only where 24VDC control power reaches the door, since its lock and unlock function is electric.
11) Can I use a wireless or RFID mortise lock instead of a BEST EM303 when I cannot pull wire to the door?
Yes, that is the usual path. The Schlage LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and mobile-enabled deadbolt with LED on Greenwich trim, right hand, with a 3 hour fire rating. The TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID technology for 1-3/4 inch doors, and the Dormakaba Saffire LX-I-M002 is an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2. The BEST EM303 is the wired counterpart, taking 24VDC at the door and returning an SPDT trim status signal to the panel.
12) My electrified mortise lock is going on a fire rated door. What are my options besides the BEST EM303?
The EM303 is ordered with a latchbolt monitor switch in either a fire rated or a standard version, so the fire rated build is selected at order time. Among the peer electrified mortise locks, the Schlage LEMD-GRW carries a 3 hour fire rating as a Grade 1 ENGAGE Series wireless mortise lock, and the Schlage LEBMB-ADD is a Grade 2 mobile-enabled mortise lock with push button and LED for 1-3/4 inch doors, also rated 3 hours. On the mechanical side the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with a fire rating and field reversible operation.
13) Which mortise lock replaces the BEST EM303 on a behavioral health or anti-ligature opening?
Go to the ligature resistant mortise line instead. The TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel, passage function, for 1-3/4 inch doors, and the MRX-A-01 is the same passage function in satin stainless steel with ligature resistant arch trim. The Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant in satin stainless steel. The BEST EM303 is a handed commercial electric mortise lock with electric trim control and monitoring, not a ligature resistant trim design.
14) What do I have to specify when ordering a BEST EM303 electrified mortise lock?
Four things decide the part number on an EM303: electric mode (Fail-Safe or Fail-Secure), handing (Left Hand Reverse or Right Hand Reverse), latchbolt monitor switch (Standard or Fire Rated), and finish. Finish runs across thirteen options: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 satin bronze oil-rubbed, 618 bright nickel, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, 629 bright stainless, 630 satin stainless, and 690 statuary dark bronze.
15) I need to match the EM303 to satin chrome or 630 stainless hardware already in the building. Is it offered in those?
Yes on both. 626 satin chrome and 630 satin stainless steel are standard finish choices, along with 625 bright chrome and 629 bright stainless. For a property manager standardizing a corridor, 626 and 630 are the two that will match most existing commercial lever trim and hinges already hanging in a building.
16) My door needs a wireless lock, not a hardwired one. What should I look at instead of the EM303?
The EM303 needs power run to the door, so it's the wrong choice when you can't get wire into the frame. Wireless mortise options include the Schlage Electronics LEMD-GRW, a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and a 3 hour fire rating, and the Alarm Lock DL1300NW Trilogy Networx wireless electronic mortise lock with keypad, built for Adams Rite deadlatches. Retrofitting an existing opening with no conduit is exactly where those beat a hardwired lock body.
17) Can I switch the EM303 from fail-secure to fail-safe after it's already installed?
Yes, in the field, without swapping the lock. The fail-secure to fail-safe conversion is done on site, so if a fire marshal or a change in the security plan flips the requirement on an opening after install, you reconfigure the lock rather than reorder it. That matters most on a stairwell or a fire exit where the release behavior gets decided late in the job.
18) Is a Dormakaba E-Plex pushbutton mortise lock a substitute for a BEST EM303 on an access controlled door?
They solve different problems. The E-Plex E5086 is a Grade 1 entry/egress electronic pushbutton and card lock in a back to back mortise configuration, the E-Plex 2066 is an electronic pushbutton keyless mortise lock for wide stile, and the PowerPlex P2066 is a mortise lock in the PowerPlex 2000 Series. Those grant access at the door from a code or card presented locally. The BEST EM303 has no reader of its own: it is a commercial electric mortise lock whose outside trim is locked or released by 24VDC from the access control system, with a monitoring switch reporting trim status back.
19) Can a BEST EM303 be used on an aluminum storefront or glass door opening?
That opening takes a different family of hardware. The Alarm Lock DL1300NW Trilogy Networx is a wireless electronic mortise lock with keypad made for Adams Rite deadlatches, the Dormakaba E-Plex 2066 is built for wide stile, and the Kaba Ilco BR Series is a glass door bottom rail lock. The BEST EM303 is a commercial electric mortise lock body with handed left hand reverse or right hand reverse configuration, intended for a mortise pocket in a conventional door.
20) I need finish continuity across a building where some doors are electrified and some are not. How does the BEST EM303 finish range compare with the mechanical mortise locks?
The EM303 is built in 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 satin bronze oil-rubbed, 618 bright nickel, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, 629 bright stainless steel, 630 satin stainless steel and 690 statuary dark bronze, so it can be matched to standard BHMA finish numbers used across a mixed opening schedule. On the mechanical doors nearby, the Cal-Royal NM8050 office/entrance and NM8440 privacy locksets with deadbolt are Grade 1 for 1-3/4 inch doors, and the Hager 3810S passage and 3840S privacy locks are Grade 1 with a 2-3/4 inch backset, so a schedule can pair electrified and non-electrified openings by function.
21) What should I order instead of a BEST EM303 for a dormitory or apartment entrance door with a deadbolt?
The Sargent 7925 is a dormitory exit function mortise lock with rose trim and a single cylinder deadbolt, Grade 1 heavy duty in the 7900 Series, corridor/dormitory function. For apartment entrance openings the Baldwin 6301 is an entry/apartment knob by knob mortise lock body with a 2-1/2 inch backset for doors 1-3/4 inch and over, and the 6301LS is the same body in lever by lever. The BEST EM303 covers a different requirement, electric lock and unlock of the outside trim at 24VDC with trim status monitoring.
22) Does a keypad mortise lock with cylinder override do the same job as a BEST EM303?
Not the same job. The Accentra NTM623-NR is a Grade 1 nexTouch Generation 3 mortise lock with a capacitive touchscreen keypad, no deadbolt, with cylinder override, so credentials are entered at the door and a key overrides locally. The BEST EM303 has no keypad; its outside trim locks and unlocks on a 24VDC signal and its switch reports whether that trim is locked or unlocked back to the system. Use the nexTouch where the door stands alone, and the EM303 where a panel needs both control and status.
23) What is the difference between the BEST EM303 and a mortise deadbolt like the Alarm Lock DL4500 or Kaba Ilco 185?
Those are deadbolt products. The Alarm Lock DL4500 is a Grade 1 electronic mortise deadbolt with 2,000 user codes and a privacy keypad for 1-5/8 to 1-7/8 inch doors, and the Kaba Ilco 185 Series is a deadbolt function mortise lock supplied with no handing. The BEST EM303 is a handed lock body ordered left hand reverse or right hand reverse, with a latchbolt monitor switch, and it works by electrically locking or releasing the outside trim rather than throwing a bolt on command.
24) Is the BEST EM303 rated for commercial use, or is it a residential lock?
Commercial. The EM303 is built as a commercial electric mortise lock and gets specified into building security systems, healthcare access control, schools, government and municipal buildings, industrial facilities, and multi-tenant residential. It isn't a residential-grade product and shouldn't be priced or specified against one.
25) Will a 2 Amp switch rating be enough to drive my monitoring circuit?
The EM303's monitor switch is rated to 2 Amps at 24VDC, which covers a panel input or a relay coil comfortably. It is a signalling contact, not a load switch, so don't use it to power a strike, a maglock, or anything drawing real current directly. Run it to an input or an interposing relay and let the relay carry the load.
How fast can I get the BEST EM303 FS 630 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 BEST EM303 FS 630 RHR come with a warranty?
Absolutely. The BEST EM303 FS 630 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 BEST EM303 FS 630 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 BEST EM303 FS 630 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.
!