1N4697 (DO35)

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The 1N4697 (DO35) is a Silicon Zener diode designed for reliable operation in applications where regulated constant voltage requirements are necessary. It is a commonly used Zener diode that is widely available and cost effective. The DO35 format is the standard Zener diode package and is available in either a plastic or metal case. It is characterized by a low forward voltage drop and fairly good reverse voltage protection under varying operating conditions.

A Zener diode is a two-terminal semiconductor device that can be thought of as a specialized diode. It is used most often with an applied distance in the reverse-breakdown (avalanche) region. As with a normal diode, current flows very easily in one direction, but whose voltage is widely tunable by controlling the amount of current flowing through it. As the applied voltage of a Zener diode increases, the current that goes through it also increases until the Zener breakdown voltage is reached. At the Zener breakdown voltage, the current in the diode passes through a large avalanche region and causes the voltage across the diode to remain constant regardless of further increases in current.

The 1N4697 (DO35) Zener diode has a Zener voltage range from 11.7V to 7.5V, making it popular for both voltage regulation and transient voltage suppression. There are a wide range of uses for the 1N4697. Common applications include voltage regulation circuits, RF matching circuits, voltage clamping circuits, LED lighting circuits, and surge protection. It can also be used in relatively high-power applications such as in power supplies, DC converters, load switch circuits, and in high-voltage bias circuits.

From a purely electrical end, Zener diodes are generally specified by two main parameters: the Zener breakdown voltage and reverse breakdown current, also referred to as the Zener impedance or dynamic resistance. The 1N4697 (DO35) has a reverse breakdown voltage of 7.5V to 11.7V and a reverse breakdown current of 400-1000mA. Beyond that, other important parameters that may be considered include impedance, power rating, and junction temperature.

The 1N4697 (DO35) Zener diode is an example of a reliable, cost-effective and widely available Zener diode that is essential in many applications such as voltage regulation and transient voltage suppression. Its low forward voltage drop, fairly good reverse voltage protection, wide range of Zener voltage, and reverse breakdown current make it an ideal choice for many different applications. Whether it is used for voltage regulation in a simple power supply, for LED lighting circuits, for surge protection, or for high-power applications such as load switch circuits, the 1N4697 (DO35) is a reliable and sophisticated Zener diode.

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