حفاظت مدار برق‌گیر گازی (جی دی تی)

Product Attributes

Introduction

Gas Discharge Tubes (GDTs) are connected in parallel at the front end of sensitive telecom equipment — including power lines, communication lines, signal lines, and data transmission lines — to protect against damage caused by transient surge voltages resulting from lightning strikes and equipment switching operations. Under normal operating conditions, these devices have no effect on signals. However, when an overvoltage surge occurs (such as a lightning strike), the GDT switches to a low-impedance state, bypassing energy away from sensitive equipment. Our GDTs offer a high level of surge protection, wide voltage range, low capacitance, and a variety of package options (including new SMD devices), making them suitable for applications such as Main Distribution Frame (MDF) modules, high-speed data telecom applications (e.g., ADSL, VDSL), and surge protection on power lines. Their low capacitance also reduces signal distortion. When used with PolySwitch devices in coordinated circuit protection schemes, they can help equipment manufacturers meet stringent safety regulatory standards.

Features

• Stable breakdown voltage
• High insulation resistance
• High rated current
• Low capacitance (≤0.5pF)
• Stable performance throughout service life
• Strong transient current absorption capability
• Fast response time
• RoHS compliant
• Standard dimensions: 3.2mm × 1.6mm × 1.6mm
• J-STD-020 compliant, MSL Level 1
• Storage and operating temperature: -40°C ~ +90°C

Applications

• Repeater
• Modem
• Subscriber protection
• Telephone interface
• Line card
• Data communications equipment
• Line test equipment
• PBX
• Alarm system
• Tuner
• Antenna protection