2027-07-SMLF

Series:	2027
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Voltage - DC Spark Over (Nom):	75V
Impulse Discharge Current (8/20µs):	10000A (10kA)
Tolerance:	±20%
Number of Poles:	2
Fail Short:	No
Mounting Type:	Surface Mount
Package / Case:	2-SMD Cylinder Square End

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Gas Discharge Tube Arresters (GDT) have become increasingly important in industrial, commercial and consumer markets over the past decade due to their versatility and usefulness in protecting sensitive electronic equipment from the damaging effects of transient electrical disturbances. These disturbances can be caused by lightning, utility power faults, or even as the result of electromagnetic pulses from military, transportation or communications systems. Many electrical and power systems include some form of surge protection in the form of these GDTs, as their primary purpose is to limit the voltage supplied to sensitive circuits and components.Developments in the technology of GDTs have enabled them to become increasingly more reliable, efficient, and compact. GDTs are also widely accepted due to their low cost and relatively easy installation and maintenance. This article aims to provide an overview of the application field and working principles of the SMLF GDT, an increasingly popular GDT type, and discuss some of its advantages and functionalities.SMLF Gas Discharge Tube Arresters (GDTs) are used in power systems for transient voltage surge protection from lightning or power surges through the use of a low resistance gas filled tube discharging a voltage over a specific time. They are typically configured in cascading voltage reduction stages (called cascading stages) to protect against different levels of overvoltages while maintaining high reliability. When a voltage surge is encountered, the typical voltage on the main conductors is reduced by a GDT between two levels. The first stage of the GDT reduces the voltage, and the next stage completely blocks the surge\'s passage. This pattern is repeated as the surge travels through the various GDT stages. The GDT thus acts both as a linear and non-linear device, providing voltage reduction as well as blocking, which is beneficial for protecting sensitive equipment from surges. The efficiency of SMLF GDTs can be improved by increasing the voltage reduction ratio per stage, or by decreasing the saturation current. This can be done by decreasing the tube diameter or by increasing the dielectric strength of the gas used to fill the tube. The choice of dielectric to fill the GDT is also important, and typically Argon, Krypton, and Xenon are used to reduce the transfer voltage.Another key benefit of SMLF GDTs is their ability to minimize power losses. Typically, these GDTs operate in the low current range, less than 15 A, which significantly reduces power loss to a minimum, as only small amounts of energy are dissipated in the tubes. Furthermore, since most GDTs have an isolating gap, they do not dissipate heat and are generally self-healing.Finally, SMLF GDTs are also compatible with a wide variety of operating angles and environmental conditions. This increases its flexibility and effectiveness in protecting circuits from various kinds of transient voltages, ground fault conditions, and surges.In conclusion, SMLF GDTs are increasingly becoming popular in various industries and sectors for its efficient and reliable protection against waves and surges, and for their low cost and easy installation. They are also highly versatile and compatible with a wide variety of operating angles and environmental conditions.

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