SIL relays save space in high-density switching

A new range of ultracompact single-in-line relays requires just one quarter the board area of an industry-standard 0.2 x 0.8in SIL package.

Pickering Electronics has been producing some of the smallest reed relays for instrumentation since 1968.

Continuing with this tradition, it has just surpassed all its previous standards for packing density with the introduction of the Series 117.

This superb range of single-in-line (SIL) relays requires a minimum of board area - just 0.15 x 0.27in.

This is one quarter of the board area of an industry-standard 0.2 x 0.8in SIL package.

The very small size of these relays often makes it possible to increase the functionality of existing designs without increasing the size of printed circuit boards.

Series 117 are the ideal choice for very high-density applications such as ATE switching matrices or where board area is very restricted.

They are housed in a plastic package with an internal mu-metal magnetic screen.

This has the advantage of a high permeability and low magnetic resonance and eliminates problems that would otherwise occur due to magnetic interaction.

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%.

Relays of this size without magnetic screening would therefore be totally unsuitable for applications where dense packing is required.

Series 117 relays have an insulation resistance of greater than 1000Gohm, have 5V coils with or without internal diodes and have been 100% tested for guaranteed performance.

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