DF04S/77

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Diode Type:	Single Phase
Technology:	Standard
Voltage - Peak Reverse (Max):	400V
Current - Average Rectified (Io):	1A
Voltage - Forward (Vf) (Max) @ If:	1.1V @ 1A
Current - Reverse Leakage @ Vr:	5µA @ 400V
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	4-SMD, Gull Wing
Supplier Device Package:	DFS
Base Part Number:	DF04

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Bridge Rectifiers are widely used passive devices that serve as two-directional (bidirectional) electrical rectifiers. The DF04S/77 are three-phase Bridge Rectifiers that are ideal for applications requiring bridging of AC power in a three-phase supply system. The DF04S/77 bridge rectifiers feature surge ratings of up to 25kA per cycle, making them ideal for use in high-power industrial systems and motors. The DF04S/77 features an integrated negative temperature coefficient thermistor that monitors temperature and is designed to prevent heat damage when in use. The DF04S/77 features an extremely efficient and reliable design, with low forward voltage making it an ideal choice for high current applications. It offers excellent temperature stability and thermal performance, allowing it to handle high temperatures up to +175°C. For high energy efficiency and reliability, the DF04S/77 also has high junction temperature detection and reverse avalanche capabilities.The DF04S/77 bridge rectifiers convert AC power in a three-phase supply system into DC power, which can then be used in a variety of industrial applications. The three-phase line by line configuration offers high efficiency and reliability, making it an ideal solution for motor control, industrial machinery, and other power related applications.In order to successfully use the DF04S/77 in a three-phase system, there are several factors that must be taken into account. Firstly, the rectifier should be able to handle the current ratings and power levels in the system. The system must also be able to handle the voltage ratings of the rectifier and the system should be able to provide the necessary current for the load. Additionally, the system should ensure proper protection from over-voltage and over-temperature conditions that could occur during operation.The DF04S/77 is also designed to be highly efficient, as it can handle up to 5,000V. The rectifier\'s symmetrical design also provides reduced driver power compared to other bridge rectifiers and lower EMI levels.The DF04S/77 bridge rectifier\'s working principle is based on a three-phase electric system. This can be best explained by the following illustration.In the above diagram, the three-phase power is connected to each of the three windings (A, B and C) of the rectifier. When the AC power is supplied, the voltage across each winding is detected by the rectifier and converted into a DC output that can be used by the load.When the power is supplied to winding A, it starts the charging process. As the AC current passes through, the voltage across the winding increases until the value of the voltage reaches a peak. At the same time, the voltage across winding B and winding C also starts to increase, until the peak voltage of the entire system is reached. Once the voltage has reached its peak, the reverse charging process begins. The voltage across the winding A begins to decrease and the voltage across windings B and C increase until the peak value is reached on all three windings. At this point, all of the voltages are equal and the DC output is achieved.This process is continued until the end of the cycle, when the original order of the windings is resumed. Once this occurs, the cycle begins again. The DF04S/77 bridge rectifier is a highly efficient and reliable three-phase rectifier that is ideal for use in high power industrial systems. It is designed with an integrated negative temperature coefficient thermistor that helps to ensure the safety of the system during high temperature operation. The DF04S/77 is also designed to offer high surge ratings, excellent temperature stability and thermal performance, and low forward voltage, making it an excellent choice for high current applications.

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