UG18ACTHE3/45

Diodes - Rectifiers - Arrays

The UG18ACTHE3/45 is a rectifier diode array which is utilized for high power rectification and energy storage that features low forward voltage drop, less reverse recovery time and improved power cycling capability. It is is designed to reduce electromagnetic interference (EMI), as well as snubbed with resistors to reduce peak currents. It has a capability of withstanding reverse voltages up to -32V, making it suitable for handling high voltages especially in automotive and industrial applications.

Application Fields

The UG18ACTHE3/45 rectifier diode array can be broadly used in area such as automotive, industrial control systems and for high power rectification applications. Due to its ability to withstand peak reverse voltages up to -32V, it can also be used for applications such as high-powered batteries, welding power supplies, automotive starters, industrial motors, power regulators and power supplies.

Working Principle

The UG18ACTHE3/45 is a fast recovery diode array consisting of four elements which can provide full-wave rectification for both ac and dc applications. The diode array\'s low forward voltage drop and its ability to minimize reverse recovery time help to minimize switching losses, effiency and temperature rise. In addition, it can be used as an input/output filter to reduce RF signals, spikes and transients.

In these types of diode array, the elements are configured symmetrically in two pairs connected between two common terminals, with the two terminals being the anode and cathode. This configuration allows the two pairs to work as anti-parallel diodes, conducting current alternately on both directions.Whenever the current flowing through the first pair reaches or exceeds the "reverse bias" voltage threshold, the current is blocked and flows through the other pair with the same polarity, thus allowing a full-wave rectification. The four diodes also help reduce output ripple in the circuit and decrease EMI.

The UG18ACTHE3/45 features doubled voltage absorption as compared to individual rectifier diodes operating under the same conditions. In addition, it can also be used as a snubber with a resistor to reduce peak current during recovery, helping to further minimize EMI and minimize voltage stress on the IC during power cycling.

Conclusion

The UG18ACTHE3/45 is a fast recovery diode array with four elements which allows it to be used in automotive, industrial control systems and high power rectification applications. Its low forward voltage drop and its ability to minimize reverse recovery time help to reduce switching losses, improve effiency and prevent temperature rise. It also has the ability to withstand high reverse voltages up to -32V, making it suitable for applications such as high-powered batteries, power supplies and other industrial applications.