1N4938UR-1 Datasheet/PDFIntroduction
The 1N4938UR-1 is a diode rectifier in the single category, developed by the semiconductor manufacturing conglomerate ON Semiconductor. This device is intended for use in rectifying AC power into DC power, and is suitable for highly efficient power conversion applications, including motor control, lighting control, and a variety of other general-purpose AC-to-DC conversion applications.
Application Field
The 1N4938UR-1 is designed to allow efficient rectification of low-to-medium frequency AC power, with a typical max operation frequency rated at 40 kHz. This makes the device suitable for a wide range of AC-to-DC conversion applications, such as motor control, lighting control, invertors, and other general-purpose power conversion applications. It is also suitable for industrial, automotive, and aerospace applications that require low on-state resistance and high avalanche ruggedness.
Working Principle
The 1N4938UR-1 works by allowing the AC power to pass through the device, and then converting the AC power into DC power by applying a rectification process. This process is achieved by allowing one half cycle of the AC power, such as a positive half-cycle, to pass through and be stored in the capacitance between the terminal and the semiconductor junction of the device. This stored charge then allows the device to switch on quickly and allows the other half of the AC power supply to be rectified, such as a negative half-cycle. After this, the two diode sections of the device, one anode and one cathode, are connected to opposite ends of the power supply in order to form a full-wave rectifier, which is then able to convert the AC power into DC power.
Conclusion
The 1N4938UR-1 is an efficient diode rectifier for use in a variety of AC-to-DC conversion applications, with low on-state resistance and high avalanche ruggedness. It is suitable for motor control, lighting control, invertors, and a variety of general-purpose AC-to-DC conversion applications, as well as industrial, automotive, and aerospace applications. By allowing one half of the AC power to pass through, being stored in the capacitance between the terminal and the device, then switching on quickly and allowing the other half of the AC power supply to be rectified, the device can convert the AC power into DC power in an efficient and reliable manner.