SA17AHE3/54

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TVS devices, short for transient voltage suppressors, are designed to protect sensitive electronic circuit components from sudden, unusually high voltage events known as transients. SA17AHE3/54 is one of the various TVS diodes available on the market. To understand its application field and working principle, an insight into its features is essential.

Features of SA17EH3/54

This device is a unidirectional, bi-directional, and bidirectional P-channel TVS diode array in a surface mount SOT-323 package. It consists of two independent bidirectional sections, each with an air-gap between the anode and cathode and an internal flame retardant polymer coating. Its features include:

• Low clamping voltage of 17V
• Peak pulse current (IPP) of 70A (2/10μs)
• Working peak reverse voltage of 7V
• Operating junction temperature range of -55°C to +155°C
• Power dissipation of 75mW

Application fields of SA17EH3/54

SA17AHE3/54 is specifically designed to protect sensitive electronic components from overvoltage transients which occur on power, data, and communication lines. It is commonly used in various consumer electronics such as LCD/LED displays, organic light emitting diode (OLED) displays, smartphones, tablets, and laptops. It can also be used in industrial, automotive, and computer applications.

Working principle of SA17EH3/54

SA17AHE3/54 provides a low-clamping voltage by utilizing its internal avalanche breakdown characteristics. It features a robust P-channel MOSFET structure consisting of a P-type substrate, an N-type junction, and an internal air-gap. When the voltage increases to a certain point, the avalanche breakdown occurs allowing a high current to flow. This high current then dissipates the excess voltage and clamps the voltage to its low level. Hence, it protects the circuitry from overvoltage and excessive current.

In summary, SA17AHE3/54 is a robust TVS device used to protect sensitive electronic components from overvoltage transients. It has a low clamping voltage and operating junction temperature range, as well as a high peak pulse current. With its wide range of application fields, it is an ideal choice for various consumer and industrial electronics.

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