Sunday, May 26, 2024

High-Voltage Gas Discharge Tube Series Addressing Powerline Protection 

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The Bourns Model offers high insulation resistance and an improved surge rate in a compact design, making it ideal for AC line applications and protecting equipment against high-voltage surges.

Business telephone with liquid crystal display on a desk in an office
Business telephone with liquid crystal display on a desk in an office

Bourns, Inc. has introduced its next-generation 2-electrode high-voltage gas discharge tube (GDT) product Model GDT28H Series. Designed to fulfil the protection needs of modern industrial powerline equipment, this series also caters to the rapidly expanding demand for energy electrification solutions in both consumer and commercial sectors.

The Series features a two-electrode High Voltage Gas Discharge Tube, providing high insulation resistance across a broad temperature range of -40 to +125°C. With a DC Sparkover Voltage range from 1 kV to 3.3 kV, the model offers a high current rating, quick response, and extended service life. It’s well-suited for AC isolation solutions, achieved through its operating voltage range, insulation resistance, and surge rate. Its more comprehensive operating temperature range also makes it ideal for applications in certain harsh conditions. The series includes devices with breakdown voltages from 1 to 3.3 kV dc, measuring 8mm in diameter and 6mm long, without axial leads. Nominal impulse discharge is 5kA  or 10kA max. The insulation resistance for all devices is 10GΩ at 100V, and the 2kV example sparks over at 2,500V at 100V/μs or 2,750V at 1kV/μs. Suitable applications encompass power supplies, medical devices, air conditioning, and lightning protection. The Series also meets compliance with IEC 62368-1 devices.

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The company emphasises that few surge protection components can handle the several-thousand-amp surges typical of AC mains lines, pointing out that gas discharge tubes (GDTs) can withstand high surge currents. Unlike other solutions, GDTs trigger and conduct with only tens of volts across them. With these advancements, the company asserts that customers can meet industry standards for electrical safety across various AC applications and appliances. Furthermore, the long service life of this next-generation series, coupled with features that deliver remarkable value, makes it the favoured solution for general surge protection and isolation applications.

Akanksha Gaur
Akanksha Gaur
Akanksha Sondhi Gaur is a journalist at EFY. She has a German patent and brings a robust blend of 7 years of industrial & academic prowess to the table. Passionate about electronics, she has penned numerous research papers showcasing her expertise and keen insight.

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