Cynergy3 DA (UL) 7.5kV N/O Relay Series

  • Cynergy3

Product Features

  • Normally Open, High Voltage Relays
  • UL Approved
  • Low contact resistance
  • Excellent AC characteristics
  • UL


  • Medical
  • Power Control
  • Test and Measurement


The DA (UL) series of normally open, high voltage relays offers an isolation voltage of 7.5kV with contact resistance as low as 15mΩ (typical for Rhodium contacts). These relays utilise high vacuum reed switches to achieve their excellent characteristics, and are available in choice of Rhodium or Tungsten contacts – the Rhodium contacts offer lower contact resistance, while the Tungsten handles higher switching voltages. The DA (UL) series of relays is offered as PCB and panel mountable with variety of connection options. The series has been UL approved as per pollution degree 2 classification. The DA (UL) series offers a working temperature range from -20°C up to +70°C.

  • UL approved, normally open, high voltage relays
  • 7.5kV isolation voltage
  • Contact resistance typically 15mΩ with Rhodium contacts (50mΩ maximum)
  • Maximum switching voltage as high as 5kV with Tungsten contacts
  • Excellent AC characteristics
  • PCB or panel mount versions available
  • Choice of HV connection includes flying leads, solder turret (wire wrap) or 1/4″ spade terminals
  • Temperature range from -20°C up to +70°C

Typical applications for the Cynergy3 DA (UL) N/O high voltage relay series include:

  • Medical – cardiac defibrilators
  • Test equipment
  • High voltage power supplies

The below table gives the full specifications for each resistor model available including the Cynergy3 DA (UL) series:

Cynergy3 DA (UL) series specifications


Weight 38.00000 kg
Dimensions 30.00 x 100.00 x 150.00mm
Series / Model

Coil Voltage

, ,

Termination / Connection Type

, , , ,

Temperature Range (°C)

Contact Material


Switching Voltage


RoHS Compliant Product – Cynergy3

This product is available fully compliant to the RoHS EU directive 2011/65/EU.

Cynergy3 DA series Ordering Info

Below is a part number break down for the DA (UL) High Voltage Relay series:

Cynergy3 DA (UL) Series ordering information

Cynergy3 DA (UL) Series technical library

We are pleased to provide you with a range of additional content including product datasheets, case studies, white papers and application notes for your reference. Please see below for the latest content available:



Cynergy3 DA (UL) High Voltage Relay Series Datasheet
Application notes for Cynergy3 high voltage reed relays
How to protect reed switch contacts
Cynergy3 provide High Voltage Reed Relays to DIAN racing
Cynergy3 is delighted to be sponsoring Elefant Racing Bayreuth

Cynergy 3 Video Library

We are pleased to provide you with a range of videos, please see below for the latest content available:

Sensata & Cynergy3 – Empowering Innovations

More information about Sensata Technologies and Cynergy3 and the products they have to offer.

Sensata & Cynergy3 – Wireless Sensors

More information about the capabilities and benefits of suing wireless technologies to advance your sensor solutions.

Cynergy3 DA (UL) 7.5kV N/O Relay Series

Calculators and Converters

Work out what you need for your project. Go to calculators and convertors

Contact us if you need your items quicker or need more than in stock.