SA85AHE3/54

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Transient Voltage Suppressors (TVSs) are solid-state devices designed to protect sensitive electronic components from damaging voltage spikes. TVS - Diodes, specifically, are a type of silicon-based TVSs that limit transients by clamping. The SA85AHE3/54 is a short-term overvoltage protection Hermetically Sealed Ultra Low Capacitance TVS - Diode that is used to protect against voltage transients in a wide range of applications, such as telecommunications, aerospace electronics, automotive, and industrial equipment. This article will explain the application field and working principle of the SA85AHE3/54.

The SA85AHE3/54 is a three-line TVS - Diode that features one bidirectional diode with a symmetrical breakdown voltage of 8.5V (±5%). It is designed to protect devices from transients up to 25A, while its capacitance (2pF) makes it suitable for ultra high-speed data communication protection. The main applications of this device are in communication circuits, IEEE1394 lines, and LVDS and HDMI interfaces.

To understand the working principle of the SA85AHE3/54, it is important to understand how TVSs in general function. In general, TVSs serve as transient suppressors and limit the overvoltage to a safe level for the protected devices. TVSs are connected in parallel to the electronic device or component to be protected, and they serve as a "clamp" to any transients. When a voltage spike occurs, the TVSs quickly become conductive, diverting the transient current, and limiting the overvoltage to a safe level. The current is then directed to ground.

The SA85AHE3/54 specifically is designed with a sharply defined clamping voltage that remains constant throughout the transient current. Its design limits the clamping voltage to a minimum, allowing for superior protection of sensitive electronics from transient voltage and overvoltage transients. The device also features fast response time (<5ns), high-temperature insulation, and a compact size, making it well suited for today\'s high-speed, high-density electronic systems.

The SA85AHE3/54 is an effective and reliable device for providing protection against transient voltage and overvoltage transients, making it ideal for a wide range of applications in the aerospace, automotive, industrial, and telecommunications industries. Its fast response time, small size, and overall performance make it a simple and efficient solution for providing reliable protection against damaging voltage spikes.

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