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Diodes - Rectifiers - Arrays: MURTA40040 Application Field and Working Principle

MURTA40040 is a diode rectifier array manufactured by ON Semiconductor Corp. It is a three–phase bridge rectifier array used for applications where high temperature, high ripple currents and avalanche capability are required. Further, the device offers low power loss due to its proprietary design features.

The MURTA40040 is a high current device rated at up to 400 Amps. As the name suggests, it is made up of four separate bridges, each with a rectifier functionality, offering a total output current of up to 400 Amps. As the entire device houses all four bridges in a single package, it occupies much less space as compared to four single-phase bridge rectifiers. This not only reduces the cost and saves materials, but also offers enhanced flexibility of installation.

The operating temperature of the MURTA40040 ranges from -40°C to 150°C, and its operating junction temperature ranges up to 215°C. This offers excellent performance in high temperature environments. It has a ripple current rating of up to 600 Amps, which makes it suitable to employ in applications that require high levels of peak current.

The MURTA40040 is built using a Kelvin sensing technique that maintains the device on conducting condition even at high reverse voltages. This reduces power dissipation and heat generation compared to the other rectifier arrays. Further, adopted proven circuit designs eliminate false triggering of the transient protection circuit.

The construction of the device is designed to offer better thermal performance. The use of low thermal resistance components provides improved temperature distribution, which increases its reliability. The device incorporates avalanche diode ratings, which enables it to better withstand electrical transients.

Since the construction of the MURTA40040 is designed to meet the high current requirements of many applications, it can be used for a wide range of applications, including power conditioning, power factor correction, battery charging, and DC and AC power systems.

In summary, the MURTA40040 is a three-phase bridge rectifier array offering excellent performance in high temperature environment. The low thermal resistance, high temperature capability and avalanche diode ratings make it suitable for a wide range of applications in power conditioning and power factor correction. Further, its Kelvin sensing technique ensures the device reliably function even at high reverse voltages, without increased power dissipation.

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