High-Q Square-Package Air Coil Inductors Feature Self-Resonant Frequencies
The AC3028SQ, AC5037SQ, ACXX14SQ, ACXX15SQ, and ACXX18SQ Series air coil inductors from Bourns deliver high Q and high self-resonant frequency (SRF) with tight inductance tolerance. Intended to meet the demands for smaller, faster, and more compact electronics, they feature a square package design with a flat top and bottom that streamlines reliable pick-and-place assembly while providing superior mechanical stability.
Available in inductances ranging from 5.5 to 82 nH, the new inductor series offers high Q values (up to 230) and a compact form factor. Thus, they’re easy to integrate into modern high-frequency TV and radio receivers, radio transmitters, RF amplifiers, and tuning application designs. In addition, they have a tight tolerance of 2% and 5%, with DCR values that range from 3.4 to 12 mΩ.
Furthermore, the air coil inductors offer rated current values from 2.7 to 5.6 A and feature an operating temperature range of from −25 to +125°C.
The series of RoHS-compliant inductors is available now. More detailed product information can be found here.
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.

