P4KA39AHE3/73

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TVS (transient voltage suppressor) diodes are electronic components used to protect other components within a circuit from voltage surges. The P4KA39AHE3/73 is a type of TVS diode specifically designed to guard against high voltage ESD events in automotive applications. It is an advanced, unidirectional device with an ESD rating of IEC Level 4, providing excellent clamping performance and protection.

The P4KA39AHE3/73 is a robust ESD protection device with an operating junction temperature up to 175°C, higher surge capability (>200W) for very narrow PK conditions and higher ESD capability (8kV/16kV). This ESD protection device features a very low capacitance of only 0.1pF, which helps reduce EMI and maintains system speed. Its low clamping voltage and fast response time (less than 1µs) help protect against overvoltage and spikes, which could otherwise damage sensitive electronic components. The device is RoHS compliant and is widely used for a variety of automotive applications, including automotive lighting, engine control modules, IGBT modules, and ABS systems.

The P4KA39AHE3/73’s working principle is based on its junction capacitance and parasitic inductance. When a voltage surge occurs, the junction capacitance and inductance provide a “clamping” action to limit the voltage on the protected circuit. A properly designed circuit will provide the necessary current flow for the device to effectively clamp the voltage spike. The P4KA39AHE3/73 is designed to have a low capacitance of <0.1pF so that the device has fast response times to clamp the voltage surge, yet still allow the protected circuit to function properly. It is designed to be easy to mount and can be mounted on a printed circuit board (PCB) or connected directly to the circuit.

The P4KA39AHE3/73 is an ideal device for protecting sensitive electronics from high voltage surges and ESD events, as it offers robust protection and a low capacitance which helps reduce EMI and maintain high-speed performance. Its ESD rating of IEC Level 4 ensures that the device is capable of withstanding high voltage spikes without any damage to the protected circuit. The device is widely used in automotive applications due to its low clamping voltage and fast response time, which help to protect sensitive components from damage.

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