New reed relays save space and design complexity Pickering Electronics has introduced a new changeover 1 Form C version of its Series 67 high voltage PCB relay that saves space and makes design simple. The company's new reed relay guarantees break-before-make operation in a single, compact part. Kevin Mallett, technical specialist at Pickering Electronics, explains: "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. These are frequently 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."