EDF1AS-E3/77 Discrete Semiconductor Products

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Bridges rectifiers are well known for their uses in applications such as AC-DC power supplies, where power needs to be converted from alternating current (AC) to direct current (DC). The EDF1AS-E3/77 bridge rectifier is a widely used rectifier diode, typically employed for general applications such as voltage doublers, inversion and rectification circuits.

Features

The EDF1AS-E3/77 bridge rectifier features two sets of three comparable diodes instead of four individual diodes in a unit. Due to the arrangement of the diodes, it is suitable for applications in which three phase AC power is needed in order to be rectified. The peak repetitive reverse voltage is 600 V, and the average rectified forward current is 3 A, with a peak foward surge current of 270 A. The device package has a width of 4 mm, a depth of 4.5 mm, and a height of 21.5 mm.

Principles of Operation

Bridge rectifiers are configured in the form of a bridge, with one triangular side consisting of two pairs of diodes connected between two points of AC voltage input, while the other two points are connected to the load. The diodes act as two switching elements, allowing current to flow in the forward direction when the diode forward voltage drop is less than the applied voltage, and blocking current flow in the reverse direction until a high reverse voltage is applied. When AC power is applied to the input of the bridge rectifier, each diode is forward biased, with one at the same time being in reverse bias, forming a one-way path for current flow from the AC power source, through the load to the other AC input terminal.

Applications

Because of their ease of construction and operation, bridge rectifiers and the EDF1AS-E3/77 bridge rectifier are frequently used for a variety of applications. In the conversion of AC to DC in power supplies and converters, bridge rectifiers reduce the amount of space and power needed to achieve a given output. Further, bridge rectifiers are also often used in battery chargers, as they can be easily configured to draw a steady current from an AC power source. In dhis application, the rectifier typically is also paired with a transformer or variac in order to reduce the voltage to the desired level. Separately, bridge rectifiers are also used in transmission line protection and surge arrester circuits, as they can effectively block higher frequency current while allowing the desired DC current to flow through the circuit.

Conclusion

The EDF1AS-E3/77 Bridge Rectifier is a well-known device used in applications such as AC-DC power supplies, voltage doublers and rectification circuits. Its package size, diode configuration and peak forward surge current enable it to be used for a wide variety of general applications, where the generation of a steady DC current is required for operation.

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