1N2845RB

Diodes - Zener - Single

The 1N2845RB diode is a type of Zener diode, defined as a diode in which the reverse breakdown voltage and other electrical characteristics are specifically designed, to allow it to be used as a stable voltage reference. This type of diode is used in applications such as power supplies, test and measurement, and the electronics industry in general. In this article, we will discuss the application field of the 1N2845RB diode and its working principle.

Application Fields of 1N2845RB

The main application field of 1N2845RB diodes are power supplies and voltage regulation, where it is used in combination with other components to regulate the output voltage from the power supply. It is also used in test and measurement equipment, such as digital multimeters, for voltage measurement and testing. The 1N2845RB is also used in over-voltage, over-current and surge protection circuits, in order to protect sensitive electrical components from damage. Additional applications include in AC/DC converters, RF stages and TV tuners, automobile electronics and telecommunications.

Working Principle of 1N2845RB

The 1N2845RB diode is a Zener diode, which has an additional region in its band-gap curve, alongside the normal PN junction region. This region allows current to flow in the reverse direction when a certain voltage is reached, known as the breakdown voltage. This breakdown voltage is designed to be a certain value, which is typically between 5 and 200 volts for the 1N2845RB. The breakdown voltage of the 1N2845RB is specified at 14 volts, making it useful for applications where a fixed reference voltage is needed.

In normal operation, the 1N2845RB is in a forward biasing mode, in which current flows from the anode to cathode and the voltage across the diode is close to zero. When the reverse voltage exceeds the breakdown voltage, however, the diode operates in a reverse biasing mode and current flows from the cathode to anode, while maintaining the breakdown voltage between the two terminals. The breakdown voltage of the 1N2845RB is relatively stable over temperature and current, making it an ideal voltage reference.

Conclusion

The 1N2845RB diode is a type of Zener diode, designed for use in power supplies, test and measurement, over-voltage and over-current protection circuits and other applications where a stable reference voltage is needed. It operates in a forward bias state under normal operation, and in a reverse bias state when the reverse voltage exceeds the breakdown voltage. In this state, the 1N2845RB maintains a stable and relatively temperature-independent breakdown voltage between its two terminals.