DH-171SQ

Magnetic Door Holder – Flush-Mount, UL Listed

The UL Listed SECO-LARM Magnetic Door Holders are designed for virtually any remote door release applications, whether residential or commercial. Fail-safe operation, tri-volt coils, and adjustable armature plate allows for easy and flexible installation.

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  • For use with door closers to control the release and closing of residential, commercial, and public area doors
  • Adjustable armature plate reduces installation time and adjusts to door alignment changes
  • Low profile design
  • Holding force – 33-lb (15kg)
  • 3 voltages: 12/24 VAC/VDC, and 120VAC
  • Cast aluminum faceplate
  • No residual magnetism for easy release
  • Built-in voltage spike suppressor
  • Use with SECO-LARM door closers
  • Optional extension bars available: 3/4″, 1″, 4″, 7″ (19mm, 25mm, 102mm, 178mm)
  • Use with SECO-LARM door closers SD-C121-S, SD-C131-SQ, SD-C101-SGQ, or SD-C101-SBAQ
Operating voltage12 VAC/VDC, 24 VAC/VDC, 120VAC (selectable, factory preset at 120V)
Current draw12V: 52mA@12VAC, 60mA@12VDC
24V: 27mA@24VAC, 31mA@24VDC
120VAC: 24mA
Holding force33-lb (15kg)
Manual ReleaseNo
Mounting typeFlush-mount
DimensionsMagnet: 2-3/4″x4-9/16″x2-1/16″(70×116.5×52 mm)
Armature: ø2-9/16″x 1-9/16″ (ø65×40 mm)
WeightMagnet: 1-lb 1.6-oz (498g)
Armature: 8.4-oz (237g)
Product Information Sheet (PI) (pdf, 395KB)
MANUAL (pdf, 293KB)
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