1N4123 (DO35)

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The 1N4123 is a single Zener diode. It is designed to operate in the reverse breakdown region, allowing it to act as a voltage regulator, providing a stable output that is independent of input voltage fluctuations and current load changes. It is a DO35 type device featuring a glass encapsulated case and two lead pins, an anode and a cathode. The device is typically used in precision voltage regulation or temperature compensation.

The 1N4123 Zener diode operates in the reverse-biased mode with an avalanche breakdown voltage, VZ ranging from 4.7 V to 22 V. The dynamic resistance is low and the breakdown voltage is rather constant over a wide temperature range. The main application of a Zener diode is to regulate the output voltage of a power supply. It can also be used in a wide range of applications, such as temperature compensation circuits, DC-DC converters for power supply stabilization and precision voltage references.

The working principle of the Zener diode is based on the fact that when a voltage higher than the Zener voltage is applied between the two leads, it breaks down, allowing current to flow in the reverse direction. That is, when the voltage across the diode reaches the avalanche or breakdown voltage, a large amount of current flows. When the voltage remains constant, the current becomes stable and this establishes the Zener voltage.

The 1N4123 is designed to provide a stable output voltage over a wide range of input voltage and current load changes. It is capable of sustaining a wide temperature range, which makes it particularly well-suited for applications in which the external circuit must withstand thermal shock. Its low dynamic resistance also makes it ideal for use in voltage regulation circuits.

The 1N4123 is well-suited for automotive, communication, consumer, industrial, medical and computing applications. It is suitable for use in temperature compensation circuits, controlling the gain of voltage followers, voltage translation in power conversion, and voltage regulation in power supplies. It is also suitable for low power conditioning applications, due to its small size. In addition, it is used to regulate both AC and DC currents.

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