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    SECO-LARM Magnetic Door Holders DH-151SQ / DH-171SQ — Specifications

    September 08, 2026 1 min read

    Specifications for the SECO-LARM ENFORCER Magnetic Door Holder series (DH-151SQ surface-mount, DH-171SQ flush-mount).

    💾 Download Original PDF 🛒 View Product
    Full text manual (for reference)

    Specifications for the SECO-LARM ENFORCER® Magnetic Door Holder series (DH-151SQ surface-mount and DH-171SQ flush-mount) — UL-listed magnetic door holders for remote door release applications in residential, commercial, and public-area settings.

    Features

    • 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 (15 kg)
    • 3 selectable voltages: 12/24 VAC/VDC, and 120VAC
    • Cast aluminum faceplate
    • No residual magnetism, for easy release
    • Built-in voltage spike suppressor
    • Compatible with SECO-LARM door closers
    • Extension bars available: 1/2", 3/4", 1", 2" (13mm, 19mm, 25mm, 50mm)

    Model Comparison

    Spec DH-151SQ DH-171SQ
    Installation type Surface-mount Flush-mount
    Operating voltage 12/24 VAC/VDC, 120VAC
    Current draw 52mA@12VAC, 60mA@12VDC, 27mA@24VAC, 31mA@24VDC, 24mA@120VAC
    Holding force 33 lb (15 kg)
    Magnet dimensions 2¾" x 4⁹⁄₁₆" x 3" (70 x 116.5 x 76 mm) 2¾" x 4⁹⁄₁₆" x 2¹⁄₁₆" (70 x 116.5 x 52 mm)
    Armature dimensions 2⁹⁄₁₆" x 2⁹⁄₁₆" x 1⁹⁄₁₆" (65 x 65 x 40 mm)
    Magnet box weight 1 lb 6.4 oz (635g) 1 lb 1.5 oz (496g)
    Door armature weight 8.1 oz (230g)

    Manufacturer

    SECO-LARM® U.S.A., Inc. — 16842 Millikan Avenue, Irvine, CA 92606
    Phone: (949) 261-2999 | (800) 662-0800 | Fax: (949) 261-7326
    Website: www.seco-larm.com | Email: sales@seco-larm.com