10W reed relay suits high-speed test systems

1st May 2019

Mick Elliott

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Series 122 relays from Pickering Interfaces measure 12.5mm in height and are rated with a switching current of 0.5A at 10W. 3V and 5V coils are available. The 10W-rated reed relay is an addition to its 4mm² product family which features devices that occupy a PCB footprint of only 4mm x 4mm, facilitating the high packing density.

Fast operate and release times, typically 150μs or less, make Series 122 relays ideal for high speed test systems such as ATE switching matrices or multiplexers.

The 1 Form A (SPST) Normally Open (NO) Energise-to-make devices feature highest-quality, instrumentation-grade sputtered-ruthenium switches and plastic packages with internal mu-metal magnetic screening to avoid the risk of magnetic interaction issues in densely-packed applications.

Devices have an insulation resistance of greater than 10¹²Ω and are 100%-tested for dynamic contact resistance to guarantee performance.

Comments Graham Dale, technical director at Pickering Electronics: “The Series 120 - our first 4mm²^TM product - was launched with a switching rating of up to 1A at 20W and a height of 15.5mm. Last year, the Series 124 reduced this profile to 9.5mm but with a slightly lower rating of 0.5A at 5W. This new Series 122 device, therefore, fills the gap, providing customers with the flexibility they need to design in a product that exactly matches their requirements.”

For ease of servicing/replacement, relays maybe socketed using SMD or through-hole sockets. However, care must be taken to mitigate the risk of affecting contact resistance integrity.