ESH2PD-M3/85A

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Diodes are one of the most fundamental components used in electronics today. They are a semiconductor element capable of conducting current in one direction and blocking it in the other direction. Rectifiers are devices designed specifically to perform the task of converting alternating current (AC) to direct current (DC). The ESH2PD-M3/85A is a single rectifier diode specifically designed for use in applications with high voltage and current ratings. This article will discuss its application fields, as well as its working principle.

Application Field

The common application field of ESH2PD-M3/85A are medium frequency and high frequency medium voltage inverter rectifiers with ratings up to >220V. These rectifiers can be used in various industries as an efficient and reliable way to convert alternating current into direct current. Examples of these applications include motor drives, uninterruptible power supplies (UPSs), electric vehicle charging, switch mode power supplies, and many more. The ESH2PD-M3/85A\'s high power capability makes it suitable for high power conversion applications, such as HVDC converters.

Working Principle

The ESH2PD-M3/85A is a single diode rectifier with a forward voltage drop of 1.35V and a forward current rating of 125A. When used in an AC to DC conversion application, the rectifier converts the AC voltage into a pulsating DC voltage. It does this using a process of periodic forward conduction and reverse blocking. When an AC voltage is applied to the anode and cathode of the rectifier, the back to back diodes inside the rectifier each begin to alternately forward-conduct and reverse-block this voltage. The voltage on the cathode of the diode that is forward-biased will be passed through to the load device, while the diode that is reverse-biased will block the voltage from the load.

This periodic forward conduction and reverse blocking effectively results in the rectified AC voltage being converted into a pulsating DC voltage. The peak voltages of this pulsating DC will be higher than the AC peak voltage due to the forward voltage drop of the rectifier, and will be determined by the magnitude of the AC voltage and the sum of the forward voltage drops of the diode rectifier. The resulting DC load current is then determined by the frequency and peak voltage of the pulsating DC voltage.

Conclusion

The ESH2PD-M3/85A is an ideal single diode rectifier for applications requiring medium frequency and high frequency medium voltage inverters with ratings up to >220V. It has a forward voltage drop of 1.35V and a forward current rating of 125A. It works by converting the applied AC voltage into a pulsating DC voltage, which is then passed to the load device. This process results in a DC load with higher peak voltages than the AC peak voltages, which are determined by the magnitude of the AC voltage and the sum of the forward voltage drops of the diode rectifier.

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