Littelfuse GTCT38-401M-R20

GDTs (Gas Discharge Tubes) are placed in front of, and in parallel with, sensitive telecom equipment such as power lines, communication lines, signal lines and data transmission lines to help protect them from damage caused by transient surge voltages that may result from lightning strikes and equipment switching operations. These devices do not influence the signal in normal operation. However, in the event of an overvoltage surge, such as a lightning strike, the GDT switches to a low impedance state and diverts the energy away from the sensitive equipment. GDTs offer a high level of surge protection, a broad voltage range, low capacitance, and many form factors including new surface mount devices, which makes 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 results in less signal distortion. When used in a coordinated circuit protection solution with PolySwitch devices, they can help equipment manufacturers meet stringent safety regulatory standards.

• RoHS compliant
• Halogen free (refers to: Br≥900ppm, Cl≥900ppm, Br+Cl≥1500ppm)
• Wide range of voltages (75V - 4000V)
• Wide range of form factors (3mm, 5mm, 6mm, 7mm, 8mm diameter devices)
• Low capacitance and insertion loss
• Crowbar device with low arc voltage
• High accuracy spark-over voltages for high precision designs
• Devices tested per ITU K.12 recommendations
• Various lead configurations and surface-mount options
• Optional fail-short mechanism
• Non radioactive materials
• Devices certified to UL497B and UL1449

• Telecommunications - MDF modules, xDSL equipment, RF systems, antenna, base stations
• Industrial and Consumer Electronics - Power supplies, surge protectors, alarm systems, irrigation systems