1.5KE39A/54

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TVS (Transient Voltage Suppressor) diodes are designed to protect sensitive electronic components from overvoltage transients, which can be caused from various sources such as lightning, electrostatic discharge (ESD), and inductive switching. The 1.5KE39A/54 is a low capacitance TVS diode that is suitable for use in applications such as data line protection, signal line protection, and circuit board level protection.

The 1.5KE39A/54 is a unidirectional diode with a breakdown voltage of 39V and a maximum peak pulse current rating of 54A. It has an operating voltage range of 5V to 30V, a clamping voltage of 45V, an insulation resistance of 10GΩ, a capacitance of 100pF, and a reverse leakage current of 100nA. It has a very low reverse leakage current and fast response time, making it suitable for use in applications that require low capacitance and high reliability.

The primary application of the 1.5KE39A/54 is to provide protection against transient overvoltage spikes. It is typically used in power supply protection circuits, Signal Line protection circuits, and ESD Protection circuits.When an overvoltage transient is present, the TVS diode will clamp the voltage to a safe level, thereby protecting sensitive electronic components from damage due to excessive voltage.

The working principle of the 1.5KE39A/54 is based on the PN junction. When a voltage is applied to the diode, a reverse bias region will be formed across the junction. Under normal operating conditions, the current flow through the diode is regulated by the depletion layer, which inhibits the current flow. However, when a transient voltage spike occurs, the electric field in the depletion region increases, which allows for a large current to flow through the diode. This clamps the voltage to a safe level and prevents the voltage from increasing further.

In conclusion, the 1.5KE39A/54 is a low capacitance TVS diode that is designed to provide protection against transient overvoltage spikes. It is useful in applications such as data and signal line protection, as well as other power supply protection circuits. It operates on the principle of a PN junction, where the reverse bias formed across the junction’s depletion region regulates the current flow. When an overvoltage transient is present, the electric field in the depletion region increases, allowing for a large current to flow through the diode and clamp the voltage to a safe level.

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