PD3S120L-7 Discrete Semiconductor Products

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Diode Type:	Schottky
Voltage - DC Reverse (Vr) (Max):	20V
Current - Average Rectified (Io):	1A
Voltage - Forward (Vf) (Max) @ If:	420mV @ 1A
Speed:	Fast Recovery = 200mA (Io)
Current - Reverse Leakage @ Vr:	160µA @ 20V
Capacitance @ Vr, F:	46pF @ 10V, 1MHz
Mounting Type:	Surface Mount
Package / Case:	PowerDI™ 323
Supplier Device Package:	PowerDI™ 323
Operating Temperature - Junction:	-65°C ~ 125°C
Base Part Number:	PD3S120

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Introduction

Diodes - Rectifiers - Single, such as PD3S120L-7, are a class of rectifier diode commonly used in rectification applications. Although diodes are a relatively simple type of device, they find a wide range of applications in both legacy and modern-day circuit designs. This article explores the application field and working principle of PD3S120L-7.

Applications

One of the most common uses of rectifier diodes is in power-supply circuits, particularly those in which a DC voltage is to be derived from a single- or multi-phase AC supply. PD3S120L-7 is an ultra-fast rectifier diode designed to provide maximum protection for high-frequency switching power supplies, as well as for AC-DC power converters. The device features an ultra-low forward voltage drop, which enable designers to achieve the highest efficiency and reduce power loss in converter designs. In addition, the PD3S120L-7 is equipped with a wide body structure and a low thermal capacitance, allowing it to handle high frequency operations and high power dissipation with better efficiency.The device can also be used in high-frequency rectification, motor control, and data communications modules, which make the device a suitable solution for projects involving motor drive and control or high-speed data processing. Additionally, due to its low capacitance, PD3S120L-7 can also be deployed in long-distance power transmission applications, wherein the device serves as a protection component.

Working Principle

From a working principle standpoint, rectifier diodes such as PD3S120L-7 act as one-way valves that allow electric current to flow in one direction only. That is, when current is applied to the diode, the PD3S120L-7 allows electric charge to pass with minimal resistance in the forward direction, while blocking current passing in the reverse direction. This applies even to AC current, because the device can be used to filter out the reverse-voltage portion of a given alternating current waveform. For protection purposes, such as in the case of long-distance power transmission, PD3S120L-7 is designed to disconnect itself from the circuit when a predetermined reverse voltage is encountered. The device used a combination of a metal-oxide varistor (MOV) and a low capacitance Varistor Zener breakdown for this purpose.

Conclusion

In conclusion, PD3S120L-7 is a single rectifier diode belonging to the Diodes - Rectifiers - Single family. It is designed to provide maximum protection for high-frequency switching power supplies, and is suitable for applications such as motor control, high-frequency rectification, AC-DC power conversion, and long-distance power transmission. The device acts as a one-way valve, allowing electric charge to pass in the forward direction, while blocking current passing in the reverse direction. Additionally, the device is equipped with a metal-oxide varistor and a low capacitance Zener breakdown, which help protect the device against transient reverse voltages and overvoltages.

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