Cynergy3's D series high isolation and switching voltage relays are designed for both 10 kV and 15 kV applications, implementing high-vacuum reed switches with either Rhodium or Tungsten to achieve high reliability and durability. This construction makes these relays suitable for high-dependability applications such as cardiac defibrillators, test equipment, and high-voltage power supplies. The Rhodium contacts have low contact resistance, while the Tungsten contacts can switch higher voltages.