New Industry Products

High-Reliability TVS Diodes for Aerospace Applications

June 23, 2015 by Jeff Shepard

Littelfuse, Inc. has introduced six new series of high-reliability TVS diodes that are upscreened for use in aerospace applications. The 5KP/15KPA/30KPA-HR and 5KP/15KPA/30KPA-HRA Series High-Reliability TVS Diodes are designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning surges and other transient voltage events. They have been specially screened and sorted for use in dc line protection for applications that demand high reliability.

Well-suited for robust dc power protection and ESD protection, these new TVS diodes series are designed for application in aviation electronics (avionics) like FADEC, airplane sensors, avionics computers, fly-by-wire flight control systems, cockpit electronic equipment, and airport landing aid systems. Other uses include industrial applications such as in the energy industry. In addition to these off-the-shelf components, Littelfuse offers customizable upscreening and sorting flow solutions for these products to meet specialized requirements of aerospace, military, industrial and medical applications.

"Not so long ago, anyone who required high reliability TVS Diodes upscreened to specific standards had to have commercial-grade components shipped to outside subcontractor labs to undergo extra sorting processes. That extra step meant a much longer wait for delivery and substantially higher component costs," said Charlie Cai, Global Product Manager/Hi-Rel and Automotive TVS Diodes. "Now that Littelfuse is offering upscreened products off the shelf as well as process flows that can customized to our customers' requirements, they can get the parts they need much more quickly and economically."

Littelfuse 5KP/15KPA/30KPA-HR and 5KP/15KPA/30KPA-HRA Series High-Reliability TVS Diodes offer these key benefits: Military screening process flow ensures high reliability to meet the requirements of aerospace, military, industrial, and medical applications. Selection of high reliability sorting flows, which can be customized on request, provides the flexibility to address a variety of applications. Standard voltage ranges and power ratings allow for incorporating High-Reliability TVS Diodes into circuit designs easily (been characterized by RTCA/DO-160 wave forms). Long history of use in the aerospace industry ensures market-proven results.

Customizable upscreening/sorting processes available for both -HR and -HRA Series include visual monitor in process, single wafer lot source, high temperature storage life , X-ray inspection , reflow (2X), temperature cycle test, 3 sigma & dynamic test, customized Vbr/lr, additional sorting, HTRB, H3TRB, good traceability, and labeling. Only -HR Series devices undergo Group B testing. The 5KP/15KPA/30KPA-HR and 5KP/15KPA/30KPA-HRA Series High-Reliability TVS Diodes are available in P600 packaging in minimum order quantities of 800 pieces in tape-and-reel packaging on 13-inch reels.