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Seco-Larm Enforcer Track-Mount Overhead Door Magnetic Contact Switch


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Accommodates Up To 3-Inch Door-Channel Gap

The Seco-Larm Enforcer Track-Mount Overhead Door Magnetic Contact Switch is designed to monitor the open/closed status of an overhead door. It has a unique, adjustable design so it can fit on an overhead door that has a wide door-channel gap (up to 3 inches). The contact can be mounted directly to the door channel while the magnet can be mounted vertically on the door. Mounting it this way keeps it above the floor, which could help minimize the chances of it being accidentally damaged.

The Seco-Larm Enforcer Track-Mount Overhead Door Magnetic Contact Switch is ideal for both residential and industrial properties. Its housing is made with aluminium and its 36-inch wire leads are enclosed in armored cable, making it extremely durable for long-lasting use.

  • Designed to used on an overhead door with a wide gap
  • Adjustable design to fit most door-channel widths (up to 3 inches)
  • Durable aluminum housing with 36-inch wire leads enclosed in armored cable
  • For closed loop circuits
  • Fast, easy installation


  • Contact Switch
  • Magnet
  • Installation Hardware
  • Mounting Bracket
  • Manual

Building A Secure Future Since 1971

So many places and things to protect; so many ways to protect them; one partner: Seco-Larm. Under the Enforcer trademark, Home Controls offers an impressive line of Seco-Larm security products, ranging from simple switches to some of the most sophisticated alarm devices. Whether it's physical security, CCTV, access control, RF equipment, or vehicle security, Seco-Larm is the premier choice. Seco-Larm gives its customers an extensive range of dependable, cost-effective security products with a full program of service and support.


  • Manufacturer Part #: SM-4201-LQ
  • Circuit Type: Closed loop
  • Operation Gap: 3-inches (76mm)
  • Material:
    • Case: Aluminum
    • Terminal: 36-inches (91cm) armored leads
  • Contacts: Iridium-plated
  • Contact Rating:
    • 0.1A at 100VDC (max)
    • 1.0A at 10VDC (max)
    • 10W (max)
  • Operating Temperature: -15° to 160° F (-25° to 70° C)
  • Switch Cycles: 50 Million (0.1mA at 5VDC)
  • Magnetic Type: Ferrite
  • Dimensions:
    • Switch: 3-7/64 x 2-19/32 x 1-13/16 inches (79 x 66 x 46 mm)
    • Magnet: 3-7/32 x 3-17/32 x 1-3/4 inches (82 x 90 x 44 mm)
  • Certifications: RoHS
  • Warranty: Lifetime Limited