Plastic Transient Voltage Suppressors Built for Aerospace and Defense Apps

Microchip’s rugged transient suppressors, which meet the MIL-PRF-19500 qualification, offer a high peak pulse power rating of 1.5 kW.
March 17, 2026

The JANPTX family of non-hermetic plastic transient voltage suppressor (TVS) devices meet the MIL-PRF-19500 qualification, providing high-reliability protection for aerospace and defense applications. Their MIL-qualified plastic package gives designers lightweight, cost-effective protection against voltage transients such as lightning strikes, electrostatic discharge (ESD), and electrical surges — without sacrificing stringent military performance requirements. 

Microchip Technology’s JANPTX family, available in voltage ranges from 5 to 175 V, maintains a high peak pulse power rating of 1.5 kW and clamping response times measured at less than 100 ps in internal tests. Their advanced architecture supports protection from switching transients, induced RF effects, electromagnetic pulse (EMP) and secondary lightning events. The devices meet IEC61000-4-2, IEC61000-4-4, and IEC61000-4-5 standards.

Designed for surface mounting, these unidirectional TVS devices are supported by SPICE models to predict and simulate a circuit's behavior virtually. The JANPTX devices are available in production quantities. 

About the Author

Lee Goldberg

Contributing Editor

Lee Goldberg is a self-identified “Recovering Engineer,” Maker/Hacker, Green-Tech Maven, Aviator, Gadfly, and Geek Dad. He spent the first 18 years of his career helping design microprocessors, embedded systems, renewable energy applications, and the occasional interplanetary spacecraft. After trading his ‘scope and soldering iron for a keyboard and a second career as a tech journalist, he’s spent the next two decades at several print and online engineering publications.

Lee’s current focus is power electronics, especially the technologies involved with energy efficiency, energy management, and renewable energy. This dovetails with his coverage of sustainable technologies and various environmental and social issues within the engineering community that he began in 1996. Lee also covers 3D printers, open-source hardware, and other Maker/Hacker technologies.

Lee holds a BSEE in Electrical Engineering from Thomas Edison College, and participated in a colloquium on technology, society, and the environment at Goddard College’s Institute for Social Ecology. His book, “Green Electronics/Green Bottom Line - A Commonsense Guide To Environmentally Responsible Engineering and Management,” was published by Newnes Press.

Lee, his wife Catherine, and his daughter Anwyn currently reside in the outskirts of Princeton N.J., where they masquerade as a typical suburban family.

Lee also writes the regular PowerBites series