1.5KE33A

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TVS - Diodes are considered as one of the most widely used protection devices to ensure that a wide variety of devices are safeguarded against over-voltage, over-current or ESD (electrostatic discharge) conditions. As such, the 1.5KE33A TVS diode is among the most commonly used type of device for these types of applications. In this article, we will discuss the application field and working principle of this device.

Application Field

The 1.5KE33A is a 500W bi-directional TVS diode, designed to offer low capacitance protection for high-speed data lines. It is capable of dissipating a large peak power without damage, making it suitable for use in systems with high transient voltages, typically produced from ESD, load dump and Transient Enhanced Discharge (TEDDI) modes. It is also suitable for protection of signal and power lines for various types of communication systems, including Digital Audio/Video, Head end/Receiver equipment, Mobile Applications, video game boards and much more.

Working Principle

The 1.5KE33A TVS diode consists of two semiconductors, one p-type and one n-type, connected back-to-back. This creates a diode junction between the two materials. The diode junction acts like a one-way valve for electricity, allowing current to flow in one direction and preventing it from flowing in the opposite direction. Whenever an over-voltage or over-current is applied to the device, the diode junction will break down, clamping the voltage and allowing the excess current to be dissipated as heat.

The 1.5KE33A TVS diode has an internal avalanche breakdown region, which is designed to ensure that the voltage is limited to a certain threshold in case of over-voltage. This is achieved by increasing the thickness of the depletion layer, which means that the electrons and holes that cross it have more resistance, and therefore produce a lower voltage threshold across the diode. This allows the device to provide superior protection against over-voltage without affecting the normal operation of the system.

The 1.5KE33A device also features low capacitance, which helps to reduce data cross talk and maintains high-speed signal integrity. This is achieved by using an advanced construction process, which combines thin oxide layers and advanced layer engineering. This creates a diode structure that produces low capacitance spikes when the device is employed in a data signal line.

In sum, the 1.5KE33A TVS diode is a reliable and efficient protection component that provides strong protection against high transient voltages, over-voltage and over-current conditions. Its low capacitance design makes it well suited for a variety of applications that require high-speed signal integrity, including Digital Audio/Video, Head end/Receiver equipment, Mobile Applications, video game boards, and much more.

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