LT350SM

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Gas Discharge Tube Arresters (GDT) are widely used for surge protection, and the most common application of these devices is in the telecommunication industry. LT350SM is a commercial GDT designed to protect electronic devices from transient overvoltages.¹

LT350SM is a two-stage, three-electrode spark-gap structure, with a stainless steel outer casing. The arrester\'s main components are the gap electrodes, triggering mechanism and spark gap mechanism, which are all contained within the stainless steel casing. The gap electrodes, which are made of higher melting point materials, form part of the spark-gap mechanism and are used to break down the overvoltage. The triggering mechanism, which triggers the spark gap mechanism to open, is made up of positively charged particles that are attracted towards a negatively charged collector, when the voltage between the electrodes reaches a certain threshold. The spark gap mechanism is then opened and provides a low-impedance path for the overvoltage to be dissipated.²

When handling surge overvoltages, LT350SM is designed to withstand voltages up to 200V and currents of up to 6mA, which is enough to protect telecommunications systems, computers, and other electronic devices against transient overvoltages. This makes it suitable for use in a wide range of environments, such as in the home, office, industrial, and military applications.³

When LT350SM is subjected to a surge overvoltage, the gap electrodes break down, triggering the spark gap mechanism to open and providing a low-impedance path for the overvoltage to be dissipated. The spark gap mechanism then quickly reignites to return the arrester to its normal operating state. It is important to note that once the spark gap mechanism has been triggered, the arrester needs to be replaced since it can no longer protect against surge overvoltages.⁴

This device is designed to provide reliable and effective surge protection for electronic devices. In addition to its good performance in handling surge overvoltages, the arrester is also resistant to environmental conditions such as moisture, dust, and extreme temperatures. Furthermore, it has low maintenance requirements and a long service life, which makes it an ideal choice for long-term surge protection.⁵

In conclusion, LT350SM is a highly reliable and long-lasting commercial device designed for surge protection over a wide range of applications. It is easy to install and has low installation and maintenance costs, making it an ideal choice for protecting electronic devices from transient overvoltages.

¹ Du, Z., Li, X., Su, G., Chai, Y., & Fu, P. (2017). Optimally Selected Switching Device for the Overvoltage Protection of a Low-Voltage Measurement System. IEEE Transactions on Instrumentation and Measurement.

² Liu, H., Zhang, X., Zhao, S., & Zhao, Q. (2009). Switching Characteristics of Gas Discharge Tube Arresters at High Overvoltage. IEEE Transactions on Dielectrics and Electrical Insulation.

³ Abdelkader, A., Hanif, M., & Ullah Khan, M. (2012). Implementation of Gas Discharge Tube Surge Arrester for Hybrid Photovoltaic Systems. IEEE Transactions on Power Delivery.

⁴ Hanajda, T., Glogner-Jezcon, J., & Grzegorzewska, A. (2003). Features of Atmospheric Gases Impact on the Performance of AC Gas Discharge Tubes.Measurement Science Review.

⁵ Li, J., Huang, H., & Zhang, B. (2016). 30 Years R&D of Lightning Lightning Arrester. Journal of Lightning Research.

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