ZLLS400QTC

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Diodes - Rectifiers - Single: ZLLS400QTC Application Field and Working Principle

The ZLLS400QTC is a series of semiconductor diodes typically used for rectification and for switching applications. Specifically, it is a fast recovery single surface-mount glass passivated junction rectifier, packaged in a 4-pin TO-220AB standard package. It is ideal for both low and high frequency rectifier and switching applications, making it suitable for several different uses. This article will discuss the application field and working principle of the ZLLS400QTC diode.

Application Field

The ZLLS400QTC is mainly used in applications that require rectification, such as power supplies, motor control and AC-DC converters. Additionally, it is also suitable for use in automotive applications, such as car battery chargers, and for use as a switching element in high-frequency circuits, particularly for its low leakage current and high surge current capability. The ZLLS400QTC also displays low forward voltage drop and reverse recovery time, making it suitable for a wide range of rectifier and switching applications.

Working Principle

The ZLLS400QTC is essentially a two-terminal semiconductor device, typically composed of a layer of silicon. Electrons in the outermost orbits of the atom fill "holes" in the atom\'s inner shells. The resulting rectification effect causes one terminal (the anode or the cathode) to become positively charged, while the other becomes negatively charged. This creates a potential difference between the two terminals, known as a voltage drop.

When current is applied to the ZLLS400QTC, the positive terminal carries the positive current, and the negative terminal carries the negative current. The flow of current is then limited to one direction by the rectification effect, allowing current to flow from the anode to the cathode only. This rectification process is what allows the ZLLS400QTC to be used for rectification and switch applications.

Junction Construction

The ZLLS400QTC is constructed with a junction made of a p-type and an n-type layer of semi-conductive material, known as a PN junction. This junction blocks most of the reverse current, meaning that current only flows in one direction through the diode. Additionally, the junction is surrounded by an electrically insulating layer of glass, known as a passivating layer, that prevents short circuits and improves the diodes reliability.

Switching Speed

The ZLLS400QTC is designed to switch quickly, with a reverse recovery time of only 4 ns, allowing it to switch at frequencies of up to 1 MHz. Additionally, its low leakage current ensures that it does not interfere with other components in high-frequency circuit applications. Furthermore, the ZLLS400QTC’s high surge current capability makes it suitable for use in applications requiring very high current surges, such as those found in motor control applications.

Reverse-Bias Protection

The ZLLS400QTC is protected from reverse-bias voltages, which can cause it to fail. This protection is ensured by the reverse-bias blocking feature of the PN junction. When a voltage is applied in the reverse direction, the holes in the inner shells of atoms become larger, thus blocking the passage of current and preventing the diode from being damaged by excessive current. Additionally, the glass passivating layer surrounding the junction helps to reduce the possibility of short-circuits and thermal runaway.

Conclusion

The ZLLS400QTC is a fast recovery single surface-mount glass passivated junction rectifier, ideal for both low and high frequency rectifier and switching applications. It is typically used for power supplies, motor control and AC-DC converters, as well as automotive applications, such as car battery chargers. Its low forward voltage drop and reverse recovery time, high surge current capability and low leakage current make it suitable for a wide range of applications. In addition, its reverse-bias protection feature ensures its reliability and durability by blocking excessive current.

The specific data is subject to PDF, and the above content is for reference