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What might cause a reed relay to have many high pull-in voltage failures?

We suggest checking the following items:

  1. Are you using a metal cover?  If so, is it cold rolled steel?  Is it a ferromagnetic material?
  2. Are you using a bobbinless coil?  If so, is there enough room to make the I.D. a little smaller in diameter?
  3. What is the actual range of pull-in voltage?
  4. Is there enough room to do a 1/2″ wire size larger on the coil wire?
  5. Is the reed switch bent and formed? Or is it cut and soldered to a post?  If soldered to a post go to a nickel iron pin and weld the reed switch.
  6. If all of these fail consider using an internal magnetic shield in addition to the magnetically shielding cover.
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