High voltage diodes suitable for constant current applications

Posted By : Alice Matthews
High voltage diodes suitable for constant current applications


The development of high voltage Zener diodes optimised for protection and constant current applications in a variety of electronic circuits has been announced by ROHM. The UDZLV and KDZLV series are comprised of 12 models in Zener voltages ranging from 51-150V. 

They are also AEC-Q101 compliant and provide surge resistance for greater reliability, making them suitable not only for automotive ECUs, but industrial and consumer applications as well.

Zener diodes are used in a wide variety of applications, primarily to maintain a constant voltage even when abnormally large currents temporarily flow through the circuit in order to prevent damage to electronic equipment. And the demand for Zener diodes is expected to only grow as the trend in the automotive and industrial industries continues towards greater computerisation.

Until now, ROHM has offered a popular lineup of low-voltage (2-47V) Zener diodes designed for power supplies in smartphones and portable devices. However, with the increased focus on the automotive and industrial sectors in recent years comes a need to strengthen our portfolio of power products, including resistors, transistors and diodes.

In response, they have expanded their lineup of UDZV diodes to include the high-voltage UDZLV series, which features a rated power of 0.2W in a compact 2.5x1.2mm sized package, making it suitable for consumer electronics as well as automotive ECUs, MFPs, and inkjet printers. They have also developed the KDZLV series of high voltage 1.0W rated Zener diodes for automotive and industrial applications, available in a 3.5x1.6mm form factor.

Key features:

  1. Broad lineup supports a range of applications
  2. Low noise with high surge immunity
    Both the UDZLV and KDZLV series utilise material and process optimisation to ensure high surge immunity while maintaining low noise characteristics. Their surge resistance makes them suitable for not only consumer applications, but industrial equipment and automotive systems as well that demand increased reliability.

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ELIV 2019
16th October 2019
Germany Bonn World Conference Center