Magnetic Contact NC (SAL902)

MC31 NC magnetic contact is:

• A reed switch + magnet pair
• Used in alarm systems, electric skateboards (deck/lid sensing sometimes), sliding doors and windows, battery enclosures
• NC = Normally Closed
  • Magnet close → circuit closed
  • Magnet away → circuit opens (alarm trigger)

 Typical specs:

• Wide gap type (works even if alignment isn’t perfect)
• Gap: ±35mm operate / 55mm release
• Can mount by self-adhesive or screw.