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Glass Reed Switch, SPST-NO, 12-23 AT, 200V US$1.50

Glass Reed Switch, SPST-NO, 12-23 AT, 200V

Non-Standard (Axial), Magnetic Reed Switch

This is a Hamlin MDSR-4 12-23 sub miniature, normally open reed switch with glass envelope. It has two leads. When the device is exposed to a magnetic field, the two ferrous materials inside the switch pull together, closing the switch. When the magnetic field is removed, the reeds separate and the switch opens. This makes for a great non-contact switch. This switch can carry up to 1.2A (and 0.5A switching current).

Reed Switch Features

  • Sub miniature normally open with glass envelope
  • Low, stable contact resistance
  • Low space requirement
  • Zero operating power required for contact closure
  • Fit-and-forget durability
  • Hermetically sealed switch; contacts are not effected by and have no effect on their external environment
  • Switching Current (DC) Max: 500mA
  • Switching Power Max: 10W
  • Switching Voltage (DC) Max: 200V
  • Termination Style: Axial (2 Leads)
  • Type: Glass Body
  • Must Operate: 12-23 Ampere*turns

Note: By their nature, these switches are very fragile. If you need to bend the pins, you should use two sets of needle-nose pliers or some other means of securing the switch by the lead to be bent, so as not to transfer any bending force to the glass. The pins themselves are magnetic and can affect operation if bent too much.

Reed Switch Resources

This product was added to our catalog on Monday 20 January, 2014.


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