---
product_id: 71821218
title: "- DH-171SQ Flush-Mount Magnetic Door Holder; Holding force 33-lb (15kg); Hard Wired Electric Operation"
brand: "seco-larm"
price: "VT24684"
currency: VUV
in_stock: true
reviews_count: 7
category: "Seco Larm"
url: https://www.desertcart.vu/products/71821218-dh-171sq-flush-mount-magnetic-door-holder-holding-force-33
store_origin: VU
region: Vanuatu
---

# Tri-voltage compatibility 33-lb holding force Flush-mount sleek design - DH-171SQ Flush-Mount Magnetic Door Holder; Holding force 33-lb (15kg); Hard Wired Electric Operation

**Brand:** seco-larm
**Price:** VT24684
**Availability:** ✅ In Stock

## Summary

> 🧲 Hold your space, command your flow — the magnetic door holder that means business.

## Quick Answers

- **What is this?** - DH-171SQ Flush-Mount Magnetic Door Holder; Holding force 33-lb (15kg); Hard Wired Electric Operation by seco-larm
- **How much does it cost?** VT24684 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/71821218-dh-171sq-flush-mount-magnetic-door-holder-holding-force-33)

## Best For

- seco-larm enthusiasts

## Why This Product

- Trusted seco-larm brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Flush-Mount Elegance:** Discreet installation that blends with modern interiors
- • **Powerful 33-lb Magnetic Grip:** Securely holds doors open with industrial strength
- • **Easy Post-Install Adjustments:** Armature plate alignment ensures perfect fit every time
- • **Universal Tri-Voltage Support:** Works seamlessly on 12/24 VAC/VDC & 120VAC systems
- • **Fail-Safe No Residual Magnetism:** Instant door release for safety and convenience

## Overview

The Seco-Larm DH-171SQ Flush-Mount Magnetic Door Holder delivers a robust 33-pound electromagnetic hold with tri-voltage compatibility (12/24 VAC/VDC, 120VAC). Designed for flush-mount installation, it features a sleek aluminum faceplate and fail-safe operation with no residual magnetism for effortless door release. Compatible with UL-listed Seco-Larm door closers, it offers easy armature plate adjustments and built-in voltage spike suppression, making it a reliable, professional-grade solution for controlled door management.

## Description

Designed for use with a UL-listed Seco-Larm door closer (sold separately), the Seco-Larm Magnetic Door Holder allows you to remotely control the release and closing of the door. Keep your door open all day with the door holder making sure it stays open, then when you're ready to close up, activate the door closer and the door holder will automatically release at the same time.The unit consists of two main components: 1) the electrified magnetic door holder that mounts to the wall behind your door, and 2) the armature plate that mounts onto the inside of your door in alignment with the magnet. When the door is opened all the way, the metal plate on the door is attracted to the electrified magnet on the wall, holding the door open.Used with Seco-Larm door closers to control door release and closingProvides 33 pounds of electromagnetic holding force (15kg)No residual magnetism allows easy release; fail-safe operationLow profile design with cast aluminum faceplate3 voltages: 12/24 VAC/VDC, and 120VACBuilt-in voltage spike suppressorTwo models are available. Choose between a magnetic door holder that surface-mounts onto the wall or one that flush-mounts into the wall. Both models come with all the mounting hardware you need. The armature plate is adjustable to make installation easy on any door and also adjusts to accommodate post-installation alignment changes. The unit features tri-volt coils (12/24 VAC/VDC, and 120VAC) and a built-in spike suppressor.The unit works with any Ul-listed Seco-Larm door closers. It also optionally works with Seco-Larm extension bars: 1/2", 3/4", 1", 2", 3", 4", 5", 6", 7" (13mm, 19mm, 25mm, 50mm, 76mm, 102mm, 127mm, 152mm, 178mm).ContentsMagnetic Door HolderArmature PlateBack Box (DH-151SQ Surface-Mount model only)(2) #10x11/4" Wood Screws(4) 4x8 Machine Screws(2) 3x10 Machine Screws(2) 5x15 Machine Screws(2) JumpersInstruction ManualNOTE: Requires a Seco-Larm door closer, sold separately.Technical DetailsManufacturer Part #: DH-171SQUPC: 676544017493Type: Flush-MountOperating Voltage: 12/24 VAC/VDC, 120VACCurrent Draw:52mA at 12VAC, 60mA at 12VDC27mA at 24VAC, 31m at 24VDC24mA at 120VACHolding Force: 33 pounds (15kg)Magnet Dimensions: 2-3/4 x 4-9/16 x 2-1/16 inches (70 x 116.5 x 52 mm)Armature Dimensions: 2-9/16 x 2-9/16 x 1-9/16 inches (65 x 65 x 40 mm)Magnet Box Weight: 1 pound 1.5 ounces (496g)Door Armature Weight: 8.1 ounces (230g)Approvals: UL, CE, RoHSWarranty: 2 Years

Review: Still working after three years - I purchased this over three years ago for use with our home automation system. When the garage side door is opened the door holder magnetizes and holds the door open. When the power is turned off, the magnet shuts off and the door automatically closes. The power can be turned off using the local wall switch, lack of motion after a certain time or based on other scripted events.
Review: 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.

## Features

- Used with Seco-Larm door closers to control door release and closing
- Provides 33 pounds of electromagnetic holding force (15kg)
- No residual magnetism allows easy release; fail-safe operation
- 3 voltages: 12/24 VAC/VDC, and 120VAC
- Installation Type: Flush-Mount

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Seco-Larm |
| Color | Silver |
| Exterior Finish | Aluminum |
| Installation Type | Flush-mount |
| Item Weight | 496 Grams |
| Material | Aluminum |

## Product Details

- **Material:** Aluminum
- **Brand:** Seco-Larm
- **Color:** Silver
- **Exterior Finish:** Aluminum
- **Item Weight:** 496 Grams

## Images

![- DH-171SQ Flush-Mount Magnetic Door Holder; Holding force 33-lb (15kg); Hard Wired Electric Operation - Image 1](https://m.media-amazon.com/images/I/71j++LYNCxL.jpg)

## Questions & Answers

**Q: Do you sell replacement key fobs for the secolarm dh171sq?**
A: There are no “keyfobs” with or for this product.

**Q: Do you have to have power run to operate this door stop?**
A: Yes

**Q: it can be used without power ?**
A: No

**Q: Will these mount to a single gang electrical box?**
A: Yes.  It will fit to single-gang box.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Still working after three years
*by H***. on November 22, 2025*

I purchased this over three years ago for use with our home automation system. When the garage side door is opened the door holder magnetizes and holds the door open. When the power is turned off, the magnet shuts off and the door automatically closes. The power can be turned off using the local wall switch, lack of motion after a certain time or based on other scripted events.

### ⭐⭐⭐⭐⭐ Seco-Larm
*by P***T on January 27, 2023*

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.

### ⭐⭐⭐⭐ Works.
*by D***R on January 21, 2025*

Actually locks easier at an angle contact. The door is a heavy steel cage door.

## Frequently Bought Together

- Seco-Larm DH-171SQ Flush-Mount Magnetic Door Holder; Holding Force 33-lb (15kg); for Use with Door Closers to Control The Release and Closing of Residential, Commercial and Public Area Doors
- Kidde SM120X Interconnect Accessories Smoke Relay Module
- Seco-Larm DH-151SQ Magnetic Door Holder, Surface-Mount, Adjustable Armature Plate, 33-lb Holding Force, Cast Aluminum Faceplate, Built-in Voltage Spike Suppressor, Low Profile Design

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-15*