LCN SEM7850 Sentronic Electrom...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$591.00
$389.58
LCN SEM7850 Sentronic Electromagnetic Door Holder with 35 Pound Holding Force and Tri-Voltage Design

LCN SEM7850 Sentronic Electromagnetic Door Holder with 35 Pound Holding Force and Tri-Voltage Design

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Model: SEM7850-689
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$591.00
$389.58
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LCN Sentronic 7850 Electromagnetic Door Holder with 35 Pound Holding Force and Tri-Voltage Design

Fire-Safe Door Control Solution for Commercial Applications

The LCN Sentronic 7850 is a standard profile recessed wall mount electromagnetic door holder engineered for commercial fire safety applications. This heavy-duty door holding magnet provides 35 pounds of holding force through tri-voltage design (12V/24V/120V) and automatically releases when fire alarm systems activate. The fail-safe operation ensures doors close properly during emergencies while maintaining convenient door positioning during normal operations, with UL listed certification for metal smoke barrier and labeled fire doors.

Professional Features & Benefits

  • Powerful Holding Force: Tri-voltage design delivers 35 pounds of holding force for reliable door positioning in high-traffic commercial environments.
  • Fire Safety Integration: Fail-safe operation automatically releases when fire alarm panel enters alarm condition, ensuring proper door closure during emergencies.
  • Heavy-Duty Construction: Die-cast housing provides exceptional durability for demanding commercial applications with long-term reliability.
  • Recessed Wall Mount Design: Standard profile recessed installation with 6-3/4" projection minimizes visual impact while providing secure mounting.
  • Tri-Voltage Flexibility: 12V/24V/120V operation accommodates various electrical system requirements for versatile installation options.
  • Professional Certifications: UL listed for metal smoke barrier and labeled fire doors with ANSI/BHMA A156.15 compliance for code requirements.
  • Manufacturer Warranty: Protected by 2-year warranty for added confidence and protection in commercial installations.
  • Pocket Door Compatible: Suitable for pocket door installations providing flexible application options for various architectural configurations.

Technical Specifications

  • ADA Compliant: Yes
  • BAA Qualified: Yes
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Door Type: Interior Door
  • Electronic: Yes
  • Finish Type: Powder Coat
  • Mounting Detail: Surface - Magnet
  • Mounting Method: Wall Mount
  • Product Category: Door Controls
  • Product Group: Door Controls
  • Product Model: SEM7850
  • Product Projection: 6-3/4"
  • Product Subgroup: Electromagnetic Door Holder / Releases
  • Product Type: Door Magnets
  • Product Voltage: 12V/24V/120V
  • Series: SEM 7800 Series
  • Subcategory: Fire and Life Safety Closers
  • Warranty: 2 Year

Professional Applications

  • Commercial Building Fire Safety Systems
  • Healthcare Facility Emergency Egress
  • Educational Institution Safety Compliance
  • Industrial Facility Fire Protection
  • Multi-Tenant Residential Fire Systems
  • Government Building Emergency Systems
  • Retail Establishment Fire Safety

Why Choose LCN Quality?

LCN Sentronic electromagnetic door holders deliver professional-grade fire safety performance with die-cast construction and UL listed certification for demanding commercial applications. Protected by a 2-year warranty and tested to ANSI/BHMA A156.15 standards for reliable emergency response. Engineered for critical fire safety applications where dependable automatic release operation is essential for life safety compliance.

Product Specs

Series:
SEM 7800 Series
ADA Compliant:
Yes
Mounting Detail:
Surface - Magnet
Warranty:
2 Year
BAA Qualified:
Yes
Subcategory:
Fire and Life Safety Closers
Product Group:
Door Controls
Product Subgroup:
Electromagnetic Door Holder / Releases
Product Type:
Door Magnets
Door Type:
Interior Door
Finish Type:
Powder Coat
Commercial/Residential:
Commercial
Electronic:
Yes
Product Model:
SEM7850
Product Voltage:
12V/24V/120V
Mounting Method:
Wall Mount
Product Projection:
6-3/4"
Product Category:
Door Controls
Department:
Door Hardware

LCN SEM7850-689 – Frequently Asked Questions

1) What is the LCN SEM7850 door holding magnet used for?
The LCN SEM7850 is a heavy-duty electromagnetic door holder designed to keep commercial doors open. It mounts flush in the wall and holds doors at predetermined positions. The unit releases automatically when fire alarm systems activate.
2) What door weights and widths does this magnet accommodate?
The SEM7850 handles heavy commercial doors up to standard institutional weights. Verify your specific door weight and width against manufacturer specifications. Most standard commercial hollow metal and wood doors are compatible.
3) Does this work with both left and right hand doors?
Yes, the SEM7850 is field-reversible for both left-hand and right-hand door installations. The armature plate can be positioned for either swing direction during installation.
4) What finish does this door holder come in?
The SEM7850 features a durable powder coat finish. This provides corrosion resistance and maintains appearance in high-traffic commercial environments.
5) What is the holding force of this electromagnetic door holder?
The SEM7850 provides heavy-duty holding force suitable for commercial applications. Check the manufacturer's specifications for exact holding force ratings based on your door weight and installation requirements.
6) Does this meet fire safety code requirements?
Yes, the SEM7850 releases automatically when connected to fire alarm systems. It meets requirements for fire-rated door assemblies when properly installed. Verify local code compliance with your AHJ.
7) What accessories are needed for installation?
Installation requires the armature plate that mounts to the door, electrical connections to building power, and fire alarm system integration. Template and fasteners are typically included. Verify all components before installation.
8) How is this door holder installed in the wall?
The SEM7850 requires a wall cutout for recessed mounting. Use the manufacturer's template for precise positioning. Electrical connections are made to building power and fire alarm systems by qualified electricians.
9) What maintenance does this electromagnetic door holder need?
Minimal maintenance is required. Periodically clean the magnet face and armature plate of debris. Test release function monthly with fire alarm system. Check mounting fasteners and electrical connections annually.
10) Are there other LCN door holder models available?
Yes, LCN offers various electromagnetic door holders including surface-mount and different holding force ratings. The SEM series includes multiple models for different applications and door weights.
11) What wall construction is required for this recessed unit?
The SEM7850 requires adequate wall depth for recessed mounting. Verify wall construction can support the cutout and unit weight. Steel stud walls may need reinforcement. Check structural requirements before cutting.
How fast can I get the LCN SEM7850-689 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 LCN SEM7850-689 come with a warranty?
Absolutely. The LCN SEM7850-689 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 LCN SEM7850-689?
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 LCN SEM7850-689 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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