حفاظت مدار برق‌گیر گازی (جی دی تی)

Product Attributes

Introduction

Gas discharge tubes (GDTs) are placed in parallel at the front end of sensitive telecommunications equipment on power lines, communication lines, signal lines, and data transmission lines, helping to protect these devices from damage caused by transient surge voltages that may result from lightning strikes and equipment switching operations. These devices do not affect signals during normal operation. However, when an overvoltage surge occurs (such as a lightning strike), the GDT switches to a low-impedance state and diverts energy away from sensitive equipment. Our GDTs offer high-level surge protection, wide voltage range, low capacitance, and a variety of package sizes (including new surface-mount devices), making them suitable for applications such as main distribution frame (MDF) modules, high data rate telecom applications (e.g., ADSL, VDSL), and surge protection on power lines. Their low capacitance also reduces signal distortion. When used in conjunction with PolySwitch devices in a coordinated circuit protection scheme, they can help equipment manufacturers meet stringent safety regulatory standards.

Features

• Stable breakdown voltage
• High insulation resistance
• High current rating
• Low capacitance (≤1pF)
• Stable performance over service life
• High transient current absorption capability
• Fast response time
• RoHS compliant
• Standard dimensions: 4.2mm×5.0mm×5.0mm
• J-STD-020 compliant, MSL Level 1
• Storage and operating temperature: -40℃ ~ +90℃

Applications

• Repeaters, modems
• Subscriber protection
• Data communication equipment
• Line test equipment
• Antenna protection