MMBZ5247B-HE3-18

MMBZ5247B-HE3-18 Application Field and Working Principle

The MMBZ5247B-HE3-18 is a Zener Single Diode designed by Vishay Semiconductor. Zener diodes are widely used in various applications from voltage regulation to wave-shaping and are an essential component of a variety of electronic circuits. Most commonly, the MMBZ5247B-HE3-18 is used in the design of power supplies, voltage regulators and voltage references.

Characteristic Features

The device is available in a SOD-123F package with a Cathode-Anode voltages ranging from 3.3 V to 200 V. It is RoHS compliant and compliant with J-STD-020 MSL 1, 255°C Soldering. It offers low forward voltage drop, offers excellent power dissipation, and maximum continuous forward current of 250 mA. The Zener voltage tolerance is available in 5%, 10%, and 20%. The maximum reverse leakage of the diode at 25°C is 2.0 mA. The maximum power dissipation is 500 mW.

Application Examples

This diode is usually used in the design of voltage regulators and voltage references. Applications with high current are ideal, such as power supplies and protection circuits. Additionally, the Zener single diode can also be used in AC circuits to regulate voltage and protect against voltage spikes. Furthermore, it can be used in LED lighting, LED drivers, and LED lighting circuits. It can also be used for reverse-biased protection and in hand-held electronic devices.

Working Principles

The MMBZ5247B-HE3-18 is a single diode component used as a bypass element in circuits. It allows current to flow from anode to cathode when forward biased and from cathode to anode when reverse biased. The reverse breakdown voltage (Zener voltage) is used to regulate the voltage of a circuit when the device is reverse biased. The Zener voltage is determined by the doping concentration of the components. When the circuit voltage is higher than the Zener voltage, current will flow through the component and regulate the circuit\'s output. This is how the diode works as a voltage regulator.

Zener diodes are also employed as overvoltage protection components. When the input voltage of a circuit exceeds the Zener voltage, current will flow through the diode in the opposite direction and protect the circuit from potential damages.

Conclusion

The MMBZ5247B-HE3-18 is a single Zener diode from Vishay Semiconductor, widely used in the design of power supplies, voltage regulators, and voltage references. It is coded with a 5%, 10%, or 20% Zener Tolerance, making it an excellent choice for overvoltage protection, voltage regulation, and wave-shaping applications.