5KP28CA-HR Circuit Protection

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TVS - Diodes are electrical components that use a combination of both semiconductor and resistor technologies, to protect sensitive electronic equipment from overvoltage threats such as ESD (electrostatic discharge), lightning, and high energy pulses. The 5KP28CA-HR from Littelfuse is a great example of a TVS - Diode that is tailored specifically for automotive applications, as well as industrial circuits that require robust protection from overvoltage transients.

The 5KP28CA-HR is a low-capacitance TVS Diode that works by utilizing two diodes in reversed parallel, effectively limiting the voltage across the device. It has a low dynamic impedance and a low capacitance of only 1.2pF, making it ideal for high frequency data lines that require protection from both continuous and transient overvoltage threats. The device has a maximum stand-off voltage of 28V and a peak pulse power dissipation of 8,000W so it can handle high transients without fail. Additionally, the 5KP28CA-HR is also designed with an ultra-low clamping voltage, ensuring that the voltage across the device does not exceed a certain level.

The working principle of the 5KP28CA-HR is quite straight forward. When an overvoltage transient is encountered, the two diodes in the device act as a voltage clamp, which limits the voltage across the device to a certain level determined by the breakdown voltage of the diodes. The device then removes the excess energy of the transient by utilizing the energy dissipating capabilities of the metal-oxide resistor. This is known as a thermal runaway effect, which dissipates the heat generated by the transient into the atmosphere.

The 5KP28CA-HR is used extensively in a wide variety of automotive applications, such as powertrain protection, power distribution, and engine control systems. It is also commonly used in industrial applications, such as controllers, power supplies, and other sensitive electronic equipment. The small size of the device and its low capacitance makes it highly suitable for use in high-speed data lines where overvoltage transients could cause damage.

Overall, the 5KP28CA-HR is an excellent example of a TVS - Diode that is specifically designed for use in automotive and industrial applications. The device has a low capacitance and a low clamping voltage, ensuring that any overvoltage transients are quickly dissipated. In addition, the device is quite small, making it suitable for use in high-speed data lines. With its robust protection and reliable performance, the 5KP28CA-HR is an excellent choice for any application that requires reliable protection from overvoltage transients.

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