1N982B

Diodes - Zener - Single: 1N982B application field and working principle

The 1N982B is a single, high-current silicon diode that is categorized as a Zener diode. These semiconductor devices are commonly used to regulate the voltage within electronic circuits and protect electronic components from voltage spikes.

Application Field

Zener diodes have a wide range of applications, depending on their specific characteristics. The 1N982B is useful in applications that need to enjoy a great deal of stability while also protecting their connected electronic elements against voltage overloads. For example, it can be used to implement over-voltage protection circuits in various power supply designs.

The particular model is well-suited for use in solar panel installations because it can withstand higher temperatures than some other types of diodes. It is also ideal for over-voltage protection for chips and for shunt regulator circuits.

Working Principle

Zener diodes work differently than other types of diodes in that they are made with a thicker negative layer of semiconducting material than other diodes. This allows them to be reverse-biased at a predetermined level, which enables them to act as voltage regulators. Whenever the voltage exceeds this predetermined level, the diode allows current to pass through it in order to stabilise the voltage level.

In the case of the 1N982B, it has a reverse breakdown voltage of 9.2V with a 5% tolerance. This means that the diode is required to pass current through the circuit when the voltage reaches and exceeds 9.2V. The diode also has a low reverse current of 0.4mA, so it does not require excessive power in order to enforce the predetermined voltage.

Package

Most zener diodes of the same rating usually feature similar packages, but in this case the 1N982B is available in several different sizes. The most common package for this model is the small axial.

The package is marked with a letter “B” on its left side, which is used to differentiate it from other versions that have a different breakdown rating. Additionally, its grayish-silver tinned coating helps provide extra protection against corrosion.