HV SPDT reed relays save space and design complexity

New Products |
By Nick Flaherty

Pickering Electronics has launched a new high voltage changeover 1 Form C version of its popular Series 67 high voltage PCB relay that saves space and makes design simple.

“In applications where high voltage signals need to be routed to alternate points, polarity reversing, capacitor charge or discharge for example, a high voltage Changeover relay (SPDT/Form C) would be the ideal solution,” said Kevin Mallett, Technical Specialist at Pickering Electronics.

“These are often implemented using two Normally Open (SPST/Form A) high voltage relays, by ensuring that one switch is always opened before the second switch is closed. This requires twice the PCB area and can cause complex driving issues. Also, if either of the SPST relays sticks then there is risk of unintentionally shorting signals,” he said.

As a result, the 67-1-C high voltage reed relay guarantees break-before-make operation in a single, compact part. The reed changeover relays are rated at up to 5kV stand-off, 2.5kV switching at 100W (max), and measure 58.4 x 12.6mm, the same size as a standard Series 67 relay. They are available with 5V, 12V or 24V coils with PCB connections to switch and coil.

Like other Pickering reed relays, the Series 67 parts use internal EMI screening and SoftCenter construction. The fully-encapsulated, single-in-line relays employ tungsten-plated contacts. Optional flying leads are available for high voltage connections.

“The new 67-1-C high voltage reed relays provide a ready-made solution that is simple to integrate into a new high voltage design, as well as saving substantial PCB area,” said Mallett.

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