This Magnetic Door Switch Set is a magnetic sensor alarm which control the switch of the circuit via built-in magnet. These types of switches are primarily used in home security systems. One half of the assembly set on a window or door frame and the other attached to the window or door itself.
Dimension: Approx. 27 x 14 x 8(mm)
Switch pattern: N/C normally closed, alarm-on-broken
Voltage: 100V DC
Rated power: 10W
Actuation Distance: 15-25mm
Wire lead: 24 AWG, about 300mm long
Mounting method: SMD (by screws or double-sided tapes)
There are two types of reed switches: ”normally open” reed switches and ”normally closed” reed switches. The metal reeds on a normally open switch stay open when there is no magnet near the switch. In the presence of a magnetic field, the contacts of a normally-open reed switch will close. A normally-closed reed switch is closed when it is not near a magnet; as a magnet is brought close to it, a normally-closed switch will open.