ATV04A800JB-HF Circuit Protection

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TVS (transient voltage suppression) diodes play a critical role in protecting high-value and sensitive electronic equipment from exposure to overvoltage transients that can arise from multiple sources. The ATV04A800JB-HF electronics device manufactured by STMicroelectronics is one such diode. It is designed to protect systems from surges in high-frequency transients whose rise times can be as quick as 0.5 nanoseconds. The ATV04A800JB-HF can dissipate up to 800 Watts of power and can be used to protect systems like servers, hubs, switches, routers, and other digital communication systems.

The ATV04A800JB-HF is a unidirectional device, meaning it is designed to protect against reverse transients only. It is a silicon avalanche diode that comprises a polysilicon substrate, two terminal contacts, and a N-well region with a PN junction. The PN junction is normally reverse biased under normal operating conditions and becomes forward biased when a high voltage transient is applied, allowing the transistor to enter an avalanche breakdown. In this state, the voltage drop across the transistor is clamped to an internal breakdown voltage level. This prevents the voltage transient from reaching the protected circuit and also dissipates the associated power in the form of heat.

The ATV04A800JB-HF can be used to protect high-speed digital lines from damage due to ESD, electrostatic discharge, and other types of transients. The device is capable of absorbing up to 1kV of static charge and is designed to protect against both positive and negative transients. The diode is also designed to suppress transients with a rise time of 0.5ns, making it ideal for protecting sensitive digital systems.

The ATV04A800JB-HF is also designed for use in automotive applications, as it meets the surge and transient requirements of Class B engines. The diode also has low capacitance, which reduces the EMI emission from the protected circuit. Overall, the ATV04A800JB-HF is suitable for a wide range of applications, including telecommunications, automotive, industrial, and consumer electronics.

To sum up, the ATV04A800JB-HF is a transient voltage suppression diode manufactured by STMicroelectronics for use in a variety of applications. It is designed to protect high-frequency circuits from voltage transients, electrostatic discharges, and other transient events. The diode is unidirectional and can dissipate up to 800 Watts of power. It is also designed to protect against transients with a rise time of 0.5 nanoseconds, making it suitable for use in high-speed digital systems. Additionally, the diode meets the surge and transient requirements of Class B engines and has low capacitance for reduced EMI emission.

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