World’s Smallest Reed Relay

Oct. 30, 2017
Pickering Electronics Ltd. has offered the smallest reed relay on the market.

Pickering’s new Series 120 4mm2  reed relay range only requires a board area of only 4mm x 4mm, making it the highest packing density currently available, taking up the smallest board area ever.


Two switch types will be available, a general purpose sputtered ruthenium switch rated at 15 Watts, 1 Amp (3 Volt version) or 20 Watts, 1 Amp (5 & 12 Volt versions) and a low level sputtered ruthenium switch rated at 10 Watts, 0.5 Amps.


These are the same reed switches as used in many other long-established Pickering Electronics ranges but are orientated vertically within the package, allowing this very high density. The small size of the package does not allow an internal diode. Back EMF suppression diodes are included in many relay drivers but if they are not, and depending on your drive methods, these may have to be provided externally.


The relays feature an internal mu-metal magnetic screen. Mu-metal has the advantage of a high permeability and low magnetic remanence and eliminates problems that would otherwise occur due to magnetic interaction. Relays of this small size without magnetic screening would be totally unsuitable for applications where dense packing is required.



  • SoftCenter  construction
  • Highest quality instrumentation grade switches
  • Plastic package with internal mu-metal magnetic screen
  • Highest packing density currently available
  • Insulation resistance greater than 1012 ?
  • 3, 5 or 12 Volt coils
  • 100% tested for dynamic contact resistance for guaranteed performance