Products >> Discrete semiconductor product >> Power diode

Power diodes are important semiconductor devices mainly used for high - power electrical energy conversion and control.

They work based on the unidirectional conductivity of the PN - junction. When forward - biased, a large amount of current is allowed to pass through, while when reverse - biased, the current is blocked. This characteristic enables them to play a variety of key roles such as rectification, free - wheeling, and protection in circuits.

In circuit applications, power diodes are often used in power conversion circuits. For example, in a rectifier circuit that converts alternating current to direct current, the power diode cuts off the negative half - cycle of the AC signal and only allows the positive half - cycle to pass through, thus realizing the rectification function and providing a stable DC power supply for electronic devices. In a switching power supply, the power diode can act as a free - wheeling diode. When the switching transistor is turned off, it provides a free - wheeling path for the current in the inductor and prevents the inductor from generating an excessively high back - electromotive force that could damage circuit components. In addition, in some protection circuits, power diodes can prevent reverse current from damaging the circuit and ensure the safe operation of the circuit.

Power diodes come in a variety of types, such as general - purpose rectifier diodes, fast - recovery diodes, ultra - fast - recovery diodes, and Schottky diodes. General - purpose rectifier diodes are suitable for applications where conversion speed requirements are not high; fast - recovery and ultra - fast - recovery diodes have a short reverse - recovery time and are often used in high - frequency switching circuits; Schottky diodes have the characteristics of low forward - on - voltage drop and fast switching speed, but relatively low reverse - breakdown voltage and are often used in low - voltage, high - current high - frequency circuits.

Brands of Power Diodes

Infineon: It is a world - renowned semiconductor manufacturer. Its power diode products are reliable and have excellent performance. In terms of technological innovation, it continuously launches high - performance products, such as the highly efficient and reliable CoolSiC™ Schottky diodes, which are suitable for various high - power application scenarios and are widely used in automotive electronics, industrial power supplies and other fields.
STMicroelectronics: It has extensive experience and advanced technology in the semiconductor field. Its power diode products cover a variety of types and can meet the needs of different customers. In terms of product performance, they have good stability and conduction characteristics and are widely used in numerous fields such as consumer electronics and industrial control, providing strong support for the efficient operation of electronic devices.
ON Semiconductor: The power diodes of this brand are known for their excellent energy efficiency and reliability. The products focus on performance optimization in design and can maintain a stable working state under different working conditions. In terms of market applications, they cover multiple fields from consumer electronics to industrial equipment, providing customers with a variety of choices.
Mitsubishi Electric: It has a profound technical background in the field of power semiconductors. Its power diode products have a high standard in terms of quality and performance, with characteristics such as high - voltage resistance and large - current capacity. They are suitable for industrial applications and power systems with high - power requirements and have won customers' trust with their outstanding quality and reliability. These brands play an important role in the power diode market and have made important contributions to the development and application of power diode technology through continuous research and development and innovation.