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FEATURES

• SoftCenter™ construction (see opposite)
• Highest quality instrumentation grade switches
• Mu-metal magnetic screening
• Two package styles - Mu-metal package or Plastic package with internal mu-metal magnetic screen
• They take up the minimum of board area, conserving board space
• Insulation resistance greater than 1012 ohms
• 3 or 5 Volt coils with or without internal diode
• 100% tested for dynamic contact resistance
• Pickering Electronics - A Brief History

The Pickering Series 111 is a range of magnetically screened single-in-line reed relays that stack on 0.15 inches by 0.4 inches pitch. They have an identical footprint to the Series 110 and 112 but the height is reduced to only 0.26 inches (6.6mm). The switch rating of 3 Watts is adequate for most instrumentation applications. If a higher power rating is required, please look at our Series 110 or 112 which have a 10 Watts rating and an identical pin-out. The range also includes the type 111RF, a 50 ohms coaxial device suitable for use up to 1.5GHz.

These relays require around one third the board area of the more usual 0.2 x 0.8 inch devices and are ideal for high density applications.

Two package styles are available:

• The type 111 is encapsulated in a mu-metal can. The coaxial version, type 111RF, is also available in this package style.
• The type 111P is encapsulated in a plastic package and features an internal mu-metal screen. An internal diode is an option in both types.

Magnetic screening is essential to avoid magnetic interaction problems. 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 fi gure of around 40 %. Relays of this size would therefore be totally unsuitable for applications where dense packing is required. Pickering Series 111 have an interaction figure of around 1 percent.

Pickering Electronics was formed in January 1968, with the aim to design and manufacture high quality reed relays, intended principally for use in Instrumentation and Test equipment.

Today, Pickering's Single-in-Line (SIL) range is by far the most developed in the relay industry with relays 25% the size of many of their competitors. The small SIL relays are sold in high volumes to large ATE companies throughout the world.

Pickering relays have many advantages over the more usual 'Hard Moulded' construction. They are constructed using SoftCenter TM technology which greatly reduces stress on the delicate glass reed switch capsule for maximum life and performance. Mu-metal magnetic screening allows high packing density without the risk of problems due to magnetic interaction between relays. Pickering Electronics is an ISO 9001 certified company.

Due to the unique nature of our relays, much of our production machinery is designed and manufactured by our engineering staff. Above is part of the production equipment used in the manufacture of our popular Series 109P Single-in-Line relay. This is the finishing stage in the production of the popular Series 109P relay. The relay enters this stage from the right. The unwanted part of the leadframe (the salvage bar) is removed leaving the connection pins of the relay at the finished length. The relay is then removed from the salvage plastic part and moves on to have the part number and Pickering name printed on the top face. After this, the relay passes an ink jet print head which applies the date code to the side of the relay. The finished part exits this stage and is passed to our Test Department for thermal cycling and Final Test. We do not sample test. All Pickering relays are tested for every operating parameter.

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