3KP58C

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TVS - Diodes

A transient voltage suppression diode (TVS) is a critical semiconductor component. It is typically implemented by semiconductor junction diode technology and designed to protect vulnerable electronic circuits from hazardous electrical transients, such as those caused by electrostatic discharge (ESD).

The device is designed to absorb an excess of energy in a very short period of time (in nanoseconds for ESD) and subsequently dissipate the energy as heat. They protect circuits by clamping voltages above a certain critical threshold to a safe level. Today, TVS’s are commonly used in consumer data, communication, automotive, industrial, medical electronics and in many other electronics applications.

3KP58C Application Field and Working Principle

The 3KP58C from Littelfuse is a 5.8 volt unidirectional super-fast, ultra-low leakage voltage suppressor diode. This TVS diode is designed to protect sensitive electronics from damage or latch-up due to ultra-low leakage. It is designed to be deployed on I/O and data-line circuits of logic and memory circuits. It is also ideal for protecting digital circuits from ESD damage up to 30kV ESD.

The 3KP58C offers unidirectional protection for circuit components against both ESD events and overvoltage transients up to 5.8 volts. These devices have low dynamic resistance (RDYN) and minimal capacitance, making them attractive for protecting sensitive circuits from high-speed transients, especially smaller spaces that require minimal footprint. In addition, these devices are engineered for low leakage current and are offered in the SOD-123FL package to provide excellent thermal performance in space-conscious applications.

The device has four small leads, three of which connect to the power source or data interface; the fourth lead is a ground connection which is used to complete the circuit. The 3KP58C works on a principle where a low dynamic resistance (RDYN) triggers and produces a clamping action that reduces surge voltages over the entire device. This device works as a shunt regulator and sinks the excess energy to ground which results in a decrease in the voltage drop over the VS resistor. The device then dissipates this energy as heat.

In conclusion, the 3KP58C TVS diode from Littelfuse is a popular choice for protecting sensitive logic and memory circuits from ESD and overvoltage transients up to 5.8 volts. It has a low dynamic resistance which eliminates the need for slow-responding components, making it ideal for high-frequency applications. The device also offers low leakage current and a compact footprint.

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