Micro-SIL Magnetically Screened Reed Relays

All Pickering reed relays feature the highest quality instrumentation grade reed switches making them suitable for the most demanding applications. Internal mu-metal magnetic screens (optional on Series 103) allow very high packing density. Diodes are optional.

Pickering Series 108

Micro SIL Reed Relays
For stacking on 0.15 x 0.8 inches pitch

SoftCenter™ construction
• Highest quality instrumentation grade reed switches
• Encapsulated in a mu-metal can
• Internal mu-metal magnetic screen
• Insulation resistance greater than 10E12 Ohms (1TOhms) for Form A devices
• Many benefits compared to industry standard relays. Learn more here >.
• Dry reed switches available in 1 Form A / SPST (N.O), 2 Form A / DPST (N.O.) and 1 Form C / SPDT (changeover) configurations. 2 Form A types require the same board area as 1 Form A
• 5 Volt coils are 500 ohms and may be driven directly from TTL logic
• 5, 12 and 24 Volt coils are standard, with or without internal diode
• 100% tested for dynamic contact resistance

The Pickering Series 108 is a range of magnetically screened single-in-line reed relays that stack on 0.15 inches (3.8mm) pitch, resulting in a 25 percent saving in board space over 0.2 inch (5.08mm) wide relays.

This means that it is possible to pack 33 percent more relays into the same board area.

Their small size, superb contact resistance stability and ultra high insulation resistance, greater than 10¹² ohms for Form A devices, make these relays a popular choice for high quality instrumentation.

The device is encapsulated in a mu-metal can using a very high resistivity resin. Mu-metal is used rather than steel because of both its very high permeability and its low magnetic remanence. This construction totally eliminates the risk of magnetic interaction problems. Magnetic interaction is usually measured as a percentage increase in the voltage required to operate a relay when two additional relays, stacked one each side, are themselves operated. An unscreened device mounted on this pitch would have an
interaction figure of around 40 percent, it would therefore be totally unsuitable for applications where relays are to be packed densely. Pickering Series 108 have a typical interaction figure of only 1 percent.

Dry switches are available in 1 or 2 Form A (energize to make) and 1 Form C (change-over) configurations. 3, 5 and 12 Volt coils are available, 5 Volt coils have a resistance of 500 Ohms and may therefore be driven directly from TTL logic.