VDRS20W625BSE

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TVS (transient voltage suppressor) devices are a type of semiconductor component used to reduce transient voltage fluctuation in electrical circuits. They are also known as Varistors, MOVs (metal oxide varistors), and VDRs (voltage dependent resistors). The VDRS20W625BSE is a TVS device from Vishay Intertechnology. This application note will discuss the application fields and working principle of the VDRS20W625BSE.

Application Fields

The VDRS20W625BSE is used in a wide variety of applications, from automotive, industrial, and consumer electronics to power supplies and telecommunications. This particular component is designed to provide overvoltage protection for semiconductor components in systems, and can also be used to reduce ESD (electrostatic discharge) surges in circuits.

The VDRS20W625BSE is also designed to provide protection in medium and high-voltage applications. It has an operating voltage range of 25V to 1200V, and a peak pulse power dissipation of 20W with a 6.25mm pitch. This device is RoHS-compliant, and is qualified for reflow soldering according to JEDEC standards. It is also UL88-certified, and is rated for 1000V of AC or DC working voltage.

Working Principle

The VDRS20W625BSE is a unique MOV-type device. It works by absorbing the excess current generated by an overvoltage surge, dissipating it as heat, and protecting the system. The device consists of two elements: a fixed resistor and a ceramic layer. When an overvoltage surge occurs, the current is shunted through the resistor, which causes an increase in the temperature of the ceramic layer. This raises the resistance of the device, limiting further current flow and protecting the system.

The VDRS20W625BSE is designed to be a low capacitance component. This allows it to provide excellent ESD protection while having fast response times. The device also features an open design, which enables it to dissipate heat more efficiently and improve reliability.

In addition to providing overvoltage protection, the VDRS20W625BSE can also be used as a noise filter to reduce EMI (electromagnetic interference) and RFI (radio frequency interference) in circuits. It is often used in automotive, industrial, and consumer electronic applications, such as DC-DC converters, LED displays, and other sensitive components.

Conclusion

The VDRS20W625BSE from Vishay Intertechnology is a unique TVS device designed for a variety of applications. It is capable of providing both overvoltage protection for semiconductor components, as well as EMI and RFI filtering. The device has a wide operating voltage range of 25V to 1200V, and is RoHS-compliant and UL88-certified. It is often used in automotive, industrial, and consumer applications, and is qualified for reflow soldering according to JEDEC standards.

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