P4KE9.1 Circuit Protection

TVS - Diodes

The P4KE9.1 is a high-voltage transient voltage suppressor (TVS) diode commonly used in automotive applications. The device is capable of dissipating a large amount of power that is generated by sudden and large transients, and is therefore widely used in various automotive applications such as spark plugs, EGR controllers, and ABS systems.

Application Field

P4KE9.1 diodes are typically specified for medium to medium/high voltages and allow for a higher peak pulse power rating than some of the other high voltage TVS diodes. This makes it suitable for use in Automotive, Industrial, and Consumer applications. In Automotive applications, they are commonly used as spark plug gap protectors, EGR controllers, and ABS systems. In industrial applications, they are used as protection against surge voltages and over voltage caused by electrical noise in power and signal lines. In consumer applications, they are used in circuit protection and voltage clamping.

Working Principle

The P4KE9.1 has an Reverse Stand-Off Voltage (the maximum voltage is can withstand) of 9.1V and a Breakdown Voltage (the lowest voltage at which the device starts conducting current) of 10.2V. The device also has a Power Dissipation rating of 700W (which gives it a Peak Pulse Power rating of 1.4kW). The device has a very fast response time and is capable of dissipating large amounts of power generated by transients. The device also has excellent stability, providing good electrical isolation between the protected lines and the ground.

In operation, the device works by clamping the voltage at a specified level. When the voltage exceeds the specified level, the diode begins conducting current and limiting the amount of voltage that is allowable. The device dissipates the excess power generated by the transient, thus preventing damage to other components in the circuit. This clamping is achieved by the P4KE9.1\'s Avalanche Breakdown mechanism, which uses the device\'s internal capacitance and junction field effect to achieve its clamping effect.

Conclusion

The P4KE9.1 is a high-performance TVS diode with a wide operating voltage range and excellent stability. It is suitable for a variety of automotive, industrial, and consumer applications, where its low voltage start-up and fast response time make it an ideal choice. It has a very high peak pulse power rating, which allows it to safely dissipate large amounts of power generated by transients. This makes it a rugged and reliable choice for a variety of applications.