حفاظت مدار برق‌گیر گازی (جی دی تی)

Product Attributes

Introduction

Gas discharge tubes (GDTs) normally maintain a high insulation resistance state, equivalent to an open circuit, with virtually no impact on normal circuit operation. When a transient overvoltage occurs in the circuit and its amplitude exceeds the breakdown voltage of the GDT, the gas inside the tube becomes ionized, causing the GDT to conduct rapidly and clamp the overvoltage to a lower level, thereby protecting parallel-connected electronic equipment or circuit components from damage caused by high-voltage surges. Once the overvoltage disappears, the GDT immediately returns to its high insulation resistance state and normal circuit operation resumes. The 2RD-8S series GDTs are surface mount components. They are not only compact in size and easy to install on various space-constrained PCBs, but also deliver excellent performance. Their low capacitance characteristic minimizes signal interference when used in high-frequency communication circuits. The high insulation resistance ensures no additional losses to circuit performance under normal operating conditions. The 2RD-8S series GDTs are suitable not only for protecting communication interfaces — their ability to withstand high surge currents also makes them well suited for power supply protection.

Features

• Excellent response to fast-rising transients
• Stable breakdown voltage
• GHz operating frequency
• 8/20μs pulse current capability: 20KA
• Radiation-free
• Ultra-low capacitance (<1.5pF)
• Dimensions: 8.3mm×6mm

Applications

• MDF modules
• xDSL equipment
• RF systems
• Antennas
• Base stations
• Repeaters, modems
• Telephone interfaces, line cards
• Data communication equipment
• Line test equipment
• Power supplies
• Surge protectors, alarm systems