GT-SMD181240012-TR Circuit Protection

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Voltage - DC Spark Over (Nom):	400V
Impulse Discharge Current (8/20µs):	1000A (1kA)
Tolerance:	±20%
Number of Poles:	2
Fail Short:	No
Mounting Type:	Surface Mount
Package / Case:	1812 (4532 Metric)

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GT-SMD181240012-TR Application Field and Working Principle

Gas discharge tube arresters (GDT), also known as surge arresters, are electronic components that are used to protect electric and electronic devices from overvoltage caused by lightning and transients in the power system. As the most widely used ac overhead power system overvoltage protector, GDTs have a wide range of applications, including telecommunications, radar, aviation, nuclear energy, and military power plants. The GT-SMD181240012-TR is a new type of GDT arrester manufactured by STANLEY Electric Co. Ltd. It is designed for indoor applications and has a maximum continuous operating voltage of 1240 Vrms.To understand the working principle of GDT arresters, we first need to understand their basic structure. Typically, a GDT arrester is composed of three parts: the main body, main electrode and the gas discharge tube. The main body consists of a ceramic insulator body filled with replaceable high pressure SF6 gas. The main electrode is a metal pin embedded in the insulation body, which makes contact with the outside metal housing. The gas discharge tube is a glass or quartz capillary tube located inside the main body, embedded in the gas filled ceramic insulation.When the GDT arrester is subjected to a transient overvoltage, which may be caused by lightning, the gas discharge tube acts as a conduction path for the fault current. Due to the curved shape of the discharge tube, a spark occurs inside the tube, causing the gas in the tube to ionize and form an electric current conducting arc. This arc will reduce the magnitude of the transient voltage and limit its duration, thus protecting the equipment connected to the GDT arrester.The GT-SMD181240012-TR arrester is rated for a maximum continuous operating voltage of 1240 Vrms. This means that the arrester can continuously operate without any damage to the connected device or any interruption to the power supply. The arrester has a peak current rating of 4 kA, meaning that it can safely withstand transient surges of up to 4 kA in duration without any damage. The arrester also has a maximum insulation distance of 32 mm, allowing it to be easily mounted in tight spaces.The GT-SMD181240012-TR arrester is designed for use in a variety of indoor applications, including communication networks, information technology equipment, and radar systems. It is easy to mount and maintain, with a replaceable high pressure SF6 gas in the insulation body ensuring that the arrester maintains a low profile and a reliable protection level. Its small size also makes it ideal for use in limited space areas, such as tight cabinets or server racks.In conclusion, the GT-SMD181240012-TR is a new type of GDT arrester manufactured by STANLEY Electric Co., Ltd. Its working principle is based on the discharge tube acting as a conduction path for fault current when subjected to a transient overvoltage. The arrester has a maximum continuous operating voltage of 1240 Vrms, a peak current rating of 4 kA, and a maximum insulation distance of 32 mm. It is designed for a variety of indoor applications, including communication networks, information technology equipment, and radar systems, and is easy to mount and maintain.

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