FFA05U120DNTU

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Diodes, rectifiers and arrays are commonly used within electrical and electronic circuits, to provide efficient rectification of AC voltages to DC voltages. The A05U120DNTU from IXYS is a hybrid dual pre-assembled phase-controlled rectifier that offers efficient rectification for AC voltages, with a peak forward onstate current of 120 amps and an off-state leakage current of less than 1mA. This rectifier is designed specifically for applications in motor drives and AC power conversion systems, and features a built-in thermal device for temperature-controlled operation.

An AC voltage signal contains a positive and a negative component, that is reversed periodically due to the alternating nature of the signal. Rectification is the process of filtering out the undesired negative component of a signal. This process achieves a smoothing out of the signal, converting it to a signal with (predominantly) a positive component. If the signal were converted to a DC voltage, it would be in the form of a voltage waveform of only positive waves, i.e. one side of the wave would not exist. Thus, the majority of applications that require DC voltages are in need of some sort of rectification.

Rectification can be achieved by solid-state diodes, which contain a PN junction that allows for current to flow in only one direction. An alternating motor-drive current often consists of a centre-tap winding and requires two forward diodes, two reverse diodes, two capacitors and two ballast resistors. The combined design of two devices fitted into the same package, along with necessary accessories, eliminates manufacturing complexity and cost, while increasing reliability in this type of application. This design is known as a dual pre-assembled circuit.

The A05U120DNTU module from IXYS features a dual pre-assembled circuit of two 100V diodes, in a three-terminal package. It also features a built-in thermal sensing device. This device measures the junction temperature of the module during operation, and its output has been designed to give accurate temperature compensation results. An additional feature of the A05U120DNTU is its integrated precharge circuit, which allows for a high speed start. This helps to maintain the peak currents and to extend the life of the module.

The A05U120DNTU offers high efficiency and low EMF in applications such as motor-drive, AC power conversion systems, UPS, wind power generators, de-sugarising plants, and traction. It has been designed with a rugged thermally efficient package and is rated for operation in temperatures up to 150°C. The A05U120DNTU is easy to mount and has a long life span without the need of maintenance.

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