🧲 Hold the moment, release on command — the smart door solution for the modern workspace.
The Seco-Larm DH-171SQ is a flush-mount magnetic door holder delivering a robust 33-pound electromagnetic hold. Designed for professional environments, it supports tri-voltage operation (12/24 VAC/VDC, 120VAC) and features fail-safe release with no residual magnetism. Its sleek, low-profile aluminum faceplate blends seamlessly into walls, while built-in voltage spike suppression ensures reliable, long-lasting performance. Ideal for integration with UL-listed Seco-Larm door closers, this device offers a secure, elegant solution for controlled door release and holding.
| Installation Type | Flush-mount |
| Specification Met | UL |
| UPC | 676544017493 |
| Manufacturer | Seco-Larm |
| Part Number | DH-171SQ |
| Item Weight | 1.09 pounds |
| Package Dimensions | 8.07 x 5.12 x 3.31 inches |
| Item model number | DH-171SQ |
| Is Discontinued By Manufacturer | No |
| Size | Pack of 1 |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | 2 Years |
P**T
Seco-Larm
The magnetic door holder was easy to install replacing an old one. That would not hold any more. It worked exactly an expected. I have no negatives.
D**R
Works.
Actually locks easier at an angle contact. The door is a heavy steel cage door.
A**R
Worked perfectly for replacement of broken one
I use this to hold a self closing gate and really missed it when the first one broke. This is almost an identical replacement to the original. the only con is the price. there are not many to choose from for this voltage.
K**N
Not what we were looking for
You have to connect this to electricity and we just didn’t read the product information correctly so it didn’t work for us!
A**R
Excellent
Hi I received my order and I am very satisfied customer excellence packaging extremely fast shipping I'm a returning customer Thanks again.
R**.
Works great
Good quality electromagnet. Larger than expected but works fine.
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