Authorized Seco-Larm Reseller

Seco-Larm SM-300Q/W Screw-Terminal Surface-Mount N.O. Magnetic Contact – White, 1/2″ (13mm) Gap, Open loop, UL listed, Pack of 10

Seco-LarmSKU: SM-300Q/W

Sale price$31.50
Usually ships within 3-5 business days
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Call Us: 718-435-2800


  • With Mounting Tabs
  • Surface-mount magnetic contacts
  • Screw mount using side tabs
  • Terminal cover provided (required for all applications)
  • ABS plastic case has lip to prevent wires from accidentally touching metal mountings and slotted mounting holes for easier gap adjustment
  • Gold-plated screw terminals for longer life and reliability
  • Contact reed switch is SPST, deactivated rhodium on gold under-plating, for a long life
  • 1/2” (13mm) Gap
  • Lifetime limited warranty
  • White case
  • Pack of 10



Loop Type Open loop
Electrical Configuration N/C
Operation Gap 1/2″ (13mm)
Terminals Screw-type
Color White
Mounting Tabs Yes
Material – Case High-impact ABS plastic
Contacts Deactivated rhodium on gold under-plating
Contact Rating 1.0A@10VDC (max), 10W (max)
Operating Temperature -15º~+160º F (-25º~70º C)
Switch Cycles 50 Million (0.1mA@5VDC)
Switch Dimensions 2-1/2″ x 9/16″ x 1/2″ (63.5 x 14 x 13 mm)
Magnet Dimensions 2-1/2″ x 1/2″ x 1/2″ (63.5 x 13 x 13 mm)
Magnet Type Ferrite

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