Littelfuse – Customisable upscreening and sorting process flows for high-reliability TVS diodes

Littelfuse offers four series of off-the- shelf High-Reliability (HR) Transient Voltage Suppression (TVS) diodes: the SMCJ-HR series, SMCJ-HRA series, SMDJ-HR series, and SMDJ-HRA series.

Littelfuse HR TVS diodes are well suited to aerospace applications, such as fly-by-wire flight control, engine control, power supply and distribution, cockpit electronic equipment and displays, air conditioning, on-board infotainment systems, radar systems, advanced airborne digital computers, and airfield lighting. They are also suitable for a wide variety of industrial, and medical applications.

In addition, Littelfuse offers users the ability to customise the upscreening and sorting process flows for HR TVS diodes. These components, which protect sensitive electronic equipment from voltage transients induced by lightning surges and other transient-voltage events, are specially screened and sorted for use in DC line protection in applications that demand high reliability.

In the past, HR TVS diodes were specialist products which required end-users to ship commercial-grade components to outside sub-contractor laboratories to have the extra sorting process performed. This had the effect of extending waiting and delivery times and adding extra expense.

With the availability of upscreening and sorting process flows customised to the user’s requirements, buyers can eliminate this wasted time and money while ensuring greater component quality.


  • Standard voltage ranges and power ratings
  • Supports compliance with the RTCA/DO-160 standard for avionics and airborne equipment
  • Long history of use in the aerospace industry
  • HR TVS diodes which have passed Waveform 5, level 5 are also available


  • Avionics
  • Industrial equipment
  • Medical electronics