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LEC LCN SEM7840 825 689 Door Armature Aluminum Painted Finish P15400315LEC-SEM7840-825-689 https://cdnimages.opentip.com/full/LEC/LEC-SEM7840-825-689.jpg LCN SEM7840 825 689 Door Armature Aluminum Painted Finish Manufacturer Part Number: SEM7840-825 689Door Armature, Aluminum Painted FinishProduct SpecsVendor : AllegionManufacturer : LCNSKU : SEM7840-825 689UID : LCN100SEM7840825ALGrade : Grade 1Unit of Measure : EachBAA Qualified : YesInstallation : CommercialFinishFinish689/US28Finish Description : Aluminum PaintedFinish Family : Matte SilverDimensionsPack Qty : 1SEM Series Fire/Life Safety Closers/HoldersAll SEM series magnets are UL listed for smoke barrier or labeled fire doors.Tested and certified under ANSI Standard A156.15. heavy duty, electrically controlled door holding magnets. Magnets are fail safe and hold until the current is interrupted. A manual door closer is used to control and close the door.SEM 7820 Magnet FeaturesTri-voltage design with 35lbs. of holding forceFloor-mountedNow available armature extensions from LCNSEM 7820 magnets are shipped with die cast housing, cover, armature(s) and WMS screw packUL listed for smoke barrier or labeled fire doorsSEM 7820 available in Aluminum and Dark Bronze finishesSEM 7830 Magnet FeaturesTri-voltage design with 35lbs. of holding forceSurface wall-mountedNow available armature extensions from LCNSEM 7830 magnets are shipped with die cast housing, cover, armature and WMS screw packSuitable for use in pocket door installationsUL listed for smoke barrier or labeled fire doorsSEM 7830 available in Aluminum and Dark Bronze finishesSEM 7840 Magnet FeaturesTri-voltage design with 35lbs. of holding forceLow profile recessed wall-mountedNow available armature extensions from LCNSEM 7840 magnets are shipped with die cast housing, cover, armature and WMS screw packSuitable for use in pocket door installationsUL listed for smoke barrier or labeled fire doorsSEM 7840 available in Aluminum and Dark Bronze finishesSEM 7850 Magnet FeaturesTri-voltage design with 35lbs. of holding forceStandard profile recessed wall-mountedNow available armature extensions from LCNSEM 7850 magnets are shipped with die cast housing, cover, armature and WMS screw packSuitable for use in pocket door installationsUL listed for smoke barrier or labeled fire doorsSEM 7850 available in Aluminum and Dark Bronze finishes 15400315 20.0000lbs 0.00 0.00 0.00
LCN
140.77 2026-08-24 Out of Stock
customer review - by , June 6, 2025
5/ 5stars
After installing it and adjusting it, the door closer works perfectly fine. It’s been on for about two months and no issues whatsoever and cost a whole lot less than what I was gonna buy at Home Depot.
customer review - by , May 5, 2025
5/ 5stars
Great product, would buy again
customer review - by , April 4, 2025
5/ 5stars
works great, I was only able to install using the parallel mount. I had to make a few minor modifications because I have an older (thinner panel door). I had to use shorter screws because the spring body's lower bolt holes lined up with the first thin panel. I used longer screws for the top mounting holes through the meat of the door first then used some shorter screws I had for the bottom. The template made installing so much easier. I still watched a couple videos first before installation.
customer review - by , April 4, 2025
5/ 5stars
Works great so far
customer review - by , April 4, 2025
5/ 5stars
It does what it is advertised to do
customer review - by , April 4, 2025
1/ 5stars
Doesn’t work
customer review - by , April 4, 2025
5/ 5stars
Easy to install. They provide a template and explain exactly how to install depending on the type of door you have. We were able to install without any prior experience.
customer review - by , February 2, 2025
5/ 5stars
Our office door (outside entry glass) has needed a new opener for a long time. After constantly adjusting it, the old opener failed completely. I was afraid it was going to cost several hundred dollars for a door company to come out and replace the old closer. I did some research and found this closer. It took me about 30 minutes in all to remove the old closer and install the new one. Super easy to install and it works great out of the box for our door.
customer review - by , December 12, 2024
5/ 5stars
Worked perfectly. The steel door I installed it on has very thin thin steel, so I installed it using rivnuts, to give it some threads to bite into.
customer review - by , December 12, 2024
5/ 5stars
This is an inexpensive door closer. It works. If you are replacing a continuous use door or heavy door, this isn't the product you want. It's perfect for a side door.
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LCN SEM7840-825 689 Door Armature, Aluminum Painted Finish

stars Rating 5 | 39 reviews
Brand LCN
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SKU: LEC-SEM7840-825-689-P
Price:
$140.77Free shipping on orders over $450.00 on select LEC- items. Details
Color: Aluminum Painted
Quantity:
Out of Stock
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Free Shipping Promotion: Buy more items from the same series, product code beginning with LEC-, and you can get free shipping for an order of over  $450.00  consisting of only LEC- series products.

Product Description

Manufacturer Part Number: SEM7840-825 689

Door Armature, Aluminum Painted Finish

Product Specs



    Vendor : Allegion

    Manufacturer : LCN

    SKU : SEM7840-825 689

    UID : LCN100SEM7840825AL

    Grade : Grade 1

    Unit of Measure : Each

    BAA Qualified : Yes

    Installation : Commercial


Finish



    Finish
    689/US28

    Finish Description : Aluminum Painted

    Finish Family : Matte Silver


Dimensions



    Pack Qty : 1



SEM Series Fire/Life Safety Closers/Holders


All SEM series magnets are UL listed for smoke barrier or labeled fire doors.

Tested and certified under ANSI Standard A156.15. heavy duty, electrically controlled door holding magnets. Magnets are fail safe and hold until the current is interrupted. A manual door closer is used to control and close the door.

SEM 7820 Magnet Features
  • Tri-voltage design with 35lbs. of holding force
  • Floor-mounted
  • Now available armature extensions from LCN
  • SEM 7820 magnets are shipped with die cast housing, cover, armature(s) and WMS screw pack
  • UL listed for smoke barrier or labeled fire doors
  • SEM 7820 available in Aluminum and Dark Bronze finishes

SEM 7830 Magnet Features
  • Tri-voltage design with 35lbs. of holding force
  • Surface wall-mounted
  • Now available armature extensions from LCN
  • SEM 7830 magnets are shipped with die cast housing, cover, armature and WMS screw pack
  • Suitable for use in pocket door installations
  • UL listed for smoke barrier or labeled fire doors
  • SEM 7830 available in Aluminum and Dark Bronze finishes

SEM 7840 Magnet Features
  • Tri-voltage design with 35lbs. of holding force
  • Low profile recessed wall-mounted
  • Now available armature extensions from LCN
  • SEM 7840 magnets are shipped with die cast housing, cover, armature and WMS screw pack
  • Suitable for use in pocket door installations
  • UL listed for smoke barrier or labeled fire doors
  • SEM 7840 available in Aluminum and Dark Bronze finishes

SEM 7850 Magnet Features
  • Tri-voltage design with 35lbs. of holding force
  • Standard profile recessed wall-mounted
  • Now available armature extensions from LCN
  • SEM 7850 magnets are shipped with die cast housing, cover, armature and WMS screw pack
  • Suitable for use in pocket door installations
  • UL listed for smoke barrier or labeled fire doors
  • SEM 7850 available in Aluminum and Dark Bronze finishes

warning tips WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.

Return Policy

Return could only be applied within 10 days after delivery.

Note

This product is not eligible for coupon code discount, for we've been offering the best price in the market.
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Customer Reviews
5 out of 5
see all 39 reviews
5 stars
34
4 stars
4
3 stars
0
2 stars
0
1 stars
1
Write a Review
By Billy Lopez
Date: June 23, 2025
After installing it and adjusting it, the door closer works perfectly fine. It’s been on for about two months and no issues whatsoever and cost a whole lot less than what I was gonna buy at Home Depot.
Rating: 5 stars [5 of 5 Stars!]
By A Customer
Date: May 19, 2025
Great product, would buy again
Rating: 5 stars [5 of 5 Stars!]
By Danny
Date: April 17, 2025
works great, I was only able to install using the parallel mount. I had to make a few minor modifications because I have an older (thinner panel door). I had to use shorter screws because the spring body's lower bolt holes lined up with the first thin panel. I used longer screws for the top mounting holes through the meat of the door first then used some shorter screws I had for the bottom. The template made installing so much easier. I still watched a couple videos first before installation.
Rating: 5 stars [5 of 5 Stars!]
By Kim
Date: April 13, 2025
Works great so far
Rating: 5 stars [5 of 5 Stars!]
By Your Inner Child
Date: April 11, 2025
It does what it is advertised to do
Rating: 5 stars [5 of 5 Stars!]
By zerouki rachid
Date: April 10, 2025
Doesn’t work
Rating: 1 stars [1 of 5 Stars!]
Items 1 - 6 of 39 reviews
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