PTC Thermistors for Telecom Applications
Tech Notes
One of the properties of PTC thermistors is that when an excessively large current flows, they generate heat by themselves and become highly resistive. With this property, they are used as overcurrent protection devices. This article describes applications for inrush current limiting, overcurrent protection and telecom application.
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Telecom equipment must be protected from sources of electric hazards induced at telephone lines which can cause from atmospheric discharges or discharges from neighbouring lines or in case of power contact between telephone lines and power lines.
TDK offers SMD PTC thermistors conforming to ITU-T standards and leaded disk versions with suitable resistance values for line card applications such as POTS, access networking, and customer-premises equipment.
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