VCAS120642K900DP Circuit Protection

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TVS-Varistors, MOVs and the VCAS120642K900DP are electrical components designed to protect sensitive electronic systems from external threats, including lightning, electrostatic discharge (ESD), and power surges in both high and low-voltage applications. By understanding the application field and how the device works, the designer can choose the correct VCAS120642K900DP for their particular application.

Application Field

The VCAS120642K900DP can be used in a variety of applications. These include medical equipment, telecommunications and network equipment, military and aerospace applications, industrial control systems, power supplies, automotive electronics, and consumer electronics. Due to its relatively low capacitance of 1pf, it can also be used in high-speed data transmission applications. It is typically used for unidirectional over-voltage protection.

Working Principle

The VCAS120642K900DP is a Metal Oxide Varistor (MOV) which uses a silicon oxide film with a large grain size to provide the required protection voltage. The MOV absorbs voltage which exceeds the specified threshold level without permanently damaging the device. It works by creating an avalanche breakdown of the MOV when a certain voltage threshold is exceeded. This creates a high-resistance layer which allows the excess voltage to be diverted away from sensitive components and other electronics.

The VCAS120642K900DP can also be used to protect sensitive components from ESD. An ESD pulse can severely damage any electronic device, especially when it is used in an environment where ESD is common. The MOV is designed to absorb the voltage generated by the pulse and divert it away from sensitive components, thereby preventing damage.

The VCAS120642K900DP is a robust, compact and reliable device which can be used to protect a variety of electronics from both over-voltage and ESD. As it is designed to withstand high temperatures and has low capacitance, it is suitable for high-speed data transmission applications. By understanding its application field and working principle, the device can be correctly matched to the specific requirements of the application, allowing for improved performance and reliability.

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