P4KA9.1HE3/54

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TVS or Transient Voltage Suppressors are essential components in power supply design ensuring that voltage spikes don’t reach downstream components. TVS diodes and transistors provide over-voltage and over-current protection for a variety of systems. They are used in many electronic circuits to protect them from voltage surges and power transients.

The P4KA9.1HE3/54 TVS diode is a commonly used transient voltage suppressor. It provides excellent suppression for high speed and high energy transients with low capacitance and high surge current capability. It is an efficient bi-directional protection for data, communications, and power line applications. It can withstand a maximum peak pulse current of up to 54 amps and maximum reverse stand-off voltage of 9.1 volts. It is rated at operating junction temperature of up to 150°C, and is available in the SOT-23 package.

The working principle of the P4KA9.1HE3/54 TVS diode is simple. The diode operates in either a “clamping” or “shunting” mode. In clamping mode, the diode acts as a voltage dependent resistor, clamping the voltage at its peak reverse voltage. In shunting mode, the diode acts as a current-limiting device, shunting the excess current away from the protected circuit. When the transient voltage or current exceeds its rated limits, the diode will switch on, diverting the current away from the protected circuit and safely dissipating it as heat. Once the transient has passed, the diode will return to its off state and the protected circuit will resume normal operation.

The P4KA9.1HE3/54 TVS diode can be used in a variety of applications. These include: voltage spike protection in communication systems, such as data and voice; surge protection in power supplies and distributed power systems; surge protection for Ethernet ports; protection of AC/DC power converters; and surge protection for solar power systems. It can also be used to provide protection against ESD and other electromagnetic interference in consumer and industrial electronics, and automotive applications.

The P4KA9.1HE3/54 TVS diode is an excellent choice for applications requiring effective, bi-directional transient over-voltage and over-current protection. Its excellent surge current capability, high operating temperature, and small package size make it an ideal solution for many power electronic systems.

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