TVS diodes suit industrial & avionics applications

16th October 2015

Barney Scott

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Microsemi has announced a unique series of patented, ultra-low capacitance power Transient Voltage Suppression (TVS) diode products. The devices provide protection of high speed data lines and other applications where the threat requirement’s magnitude greatly surpasses the capability of other typical low capacitance TVS devices for Ethernet protection and other data interfaces with speeds up to 500Mb/s.

The 1N8149 to 1N8182 and 1N8149US to 1N8182US surface mount low capacitance TVS diode products are available as 150W peak pulse power at 10/1,000μs with very low capacitance of only 4pF maximum. The 150W TVS diodes equate to greater than 1,000W at 8/20μs and are offered in voltages ranging from 6.8 to 170V. They also comply with high-end industrial and avionics ESD, Electrical Fast Transient (EFT) and lower level lightning threats in accordance with IEC61000-4-2, IEC61000-4-5 and RTCA-DO160 specifications. Higher power ratings of 500W at 10/1,000μs with low capacitance are in development for even higher transient threats.

Microsemi's TVS diodes provide aircraft and other electrical systems with critical protection by going into avalanche breakdown within no more than a few ns after a strike, clamping the transient voltage and routing its current to the ground.

Microsemi TVS devices have been deployed across major commercial airframes that are currently in use worldwide throughout the industry. The company's TVS products are also used in multiple engine control units and actuator controls, as well as a variety of power distribution, environmental control, communications and instrumentation systems.

“The trends toward increased aircraft electrification, greater reliability and higher fuel efficiency are on the rise, and consequently driving the need for increasingly capable, lighter and smaller TVS solutions that provide superior protection against transient over-voltage occurrences. From a global demand perspective, the overall market for protection devices is likely to reach $1bn by 2018,” said Leon Gross, Senior Director and Manager, Power Discretes and Modules Business Unit, Microsemi. “As a leader in high-reliability solutions, Microsemi continues to execute on a full range of innovative product developments to support the stringent and evolving needs of this industry.”

Microsemi’s 150W series of low-capacitance TVS diodes are available for all screening levels and are housed in void-less hermetically-sealed axial and surface mount glass packages.