CDBQR42

Diodes - Rectifiers - Single

CDBQR42 are a type of rectifier diode, often referred to as "high power" rectifiers because of their ability to handle large currents. They are composed of two pn junctions in series with a dielectric between them, often referred to as a "back to back" arrangement. As with all rectifiers, the CDBQR42 can transfer AC voltage to a DC voltage, however the main difference between these and standard rectifiers is the amount of peak current they can handle.

In the presence of a forward bias, the CDBQR42 develops a characteristic voltage drop across itself, known as a "forward voltage drop". This voltage drop is proportional to the current through the diode, and so the diode acts like a resistor in this respect. The CDBQR42 has a much higher forward voltage drop than standard rectifiers, which allows it to handle higher peak currents without being blown out.

The CDBQR42\'s most common application is in power supplies, particularly switching power supplies. A switching power supply is essentially a rectifier and regulator in one, and the rectifier is responsible for converting AC power into DC. Most switching power supplies use a combination of rectifiers and diodes, and the CDBQR42 is well-suited for this purpose due to its ability to handle larger currents than other rectifiers.

Another common application for the CDBQR42 is in automotive electrical systems. The diodes can be used to protect different parts of the system from overloads and reverse voltages, as well as to regulate the electrical currents across different parts of the system. Additionally, the CDBQR42 is used in certain circuits that require a high degree of precision, such as high-speed switching circuits.

In summary, the CDBQR42 is a type of rectifier diode with a much higher forward voltage drop than standard rectifiers. It is used in a variety of applications, primarily in power supplies, automotive electrical systems and high-speed switching circuits. It has the ability to handle large currents and can help to protect other parts of the system from overloads and reverse voltages.