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Aerospace

SMT Gas Discharge Tubes Offer Higher Surge Ratings in Smaller Footprints

11 July 2016

Littelfuse, Inc., has introduced two series of miniature surface-mount (SMT) two-terminal Gas Discharge Tubes (GDTs) designed to protect sensitive electronics from low-to-medium level lightning-induced surges and other voltage transients. The 3.5 mm diameter size of the CG6 Series Miniature SMT GDT makes it the world’s smallest two-electrode single-chamber GDT available on the market. It is also the first SMT GDT with two square terminals that offers 3 kA (8/20 µs) surge withstand capability (10 shots).

CG6 and CG7 gas discharge tubes. Source: Littelfuse.  CG6 and CG7 gas discharge tubes. Source: Littelfuse.

The CG7 Series provides surge handling capability up to 1 kA @ 8/20μs (10 shots) in a miniature SMT footprint with one square and one round terminal. Both series provide rapid response to fast-rising transients and have ultra-low capacitance, which helps to minimize insertion and return losses to ensure signal integrity in high-speed applications. The tubes’ ultra-low (< 0.3 pF) capacitance minimizes insertion losses to ensure signal integrity, which makes them ideal for high-speed broadband applications like G.Fast modems.

CG6 and CG7 Series GDTs are suited for a broad range of applications, including broadband equipment, satellite and CATV equipment, dataline and ethernet (up to 10bE) equipment, ADSL equipment, xDSL equipment, general telecom equipment, G.Fast modems, embedded multimedia terminal adapters, set-top boxes, RF connectors, multimedia over coax alliance equipment, base station RF antennas, and IADs (internet access devices).

The G6 Series is provided in a compact SMD package with two square terminals in quantities of 2,000; the CG7 Series is provided in an even smaller SMD package with one square terminal in quantities of 2,500. Both are provided in tape and reel packaging.



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