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    • Home  / Product Manuals & Documentation
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    SECO-LARM SM-4201-LQ — Track-Mount Overhead Door Magnetic Contact Specifications

    September 08, 2026 1 min read

    Specifications and dimensions for the SECO-LARM SM-4201-LQ track-mount overhead door magnetic contact, 3" gap, aluminum housing.

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

    Overview

    The SECO-LARM SM-4201-LQ is a track-mount magnetic contact designed for overhead (garage-style) doors in industrial and residential settings where a wide gap between the door and frame is present. It adjusts to fit most door-channel widths and uses a rugged aluminum housing for durability.

    Key Features

    • Designed for overhead doors with a wide gap
    • Adjustable to fit most door-channel widths
    • Rugged aluminum housing
    • 36" (91cm) wire leads enclosed in armored cable
    • Contact type: SPST, iridium-plated for high melting point and Vickers hardness — higher power handling and longer expected life
    • For closed loop circuits
    • 3" (76mm) operating gap
    • Mounting bracket included
    • Lifetime limited warranty

    Specifications

    Spec Value
    Circuit Type Closed loop
    Operation Gap 3" (76mm)
    Case Material Aluminum
    Terminal 36" (91cm) armored leads
    Contacts Iridium-plated
    Contact Rating 0.1A@100VDC (max), 1.0A@10VDC (max), 10W (max)
    Temperature -15° to 160°F (-25° to 70°C)
    Switch Cycles 50 million (0.1mA@5VDC)
    Switch Dimensions 3 7/64" x 2 19/32" x 1 13/16" (79 x 66 x 46mm)
    Magnet Dimensions 3 7/32" x 3 17/32" x 1 3/4" (82 x 90 x 44mm)
    Magnet Type Ferrite

    Warranty

    Lifetime Limited Warranty. SECO-LARM reserves the right to change specifications without notice per its policy of continual product development.