BSPD400480D3P

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Mixed-Technology TVS devices, such as the BSPD400480D3P, are designed to protect an integrated circuit or electronic system from over-voltage and over-current transients. The BSPD400480D3P uses a combination of silicon-based semiconductor technologies and discrete components to provide both low-capacitance bidding and higher-capacitance bids protection. The higher capacitance biddings are used to absorb the majority of electrical surges without damaging the protected components within the system, while the low capacitance biddings protect the system from large voltage spikes that could cause catastrophic component damages.

The BSPD400480D3P application field consists of applications where high capacitance is needed for robust surge protection. These types of applications include communication lines such as Ethernet, I2C and USB lines, as well as AC power lines such as household and industry applications. This device is well-suited to protect against high-frequency ESD transient pulses, such as those caused by static electricity.

The BSPD400480D3P consists of two main components: a low-capacitance bid disc and a high-capacitance bid disc. Each bid disc contains a dielectric layer of silicon-based semiconductor material that is surrounded by two electrodes. The lower-capacitance bid disc, or “NPN”, is used to protect the system from high voltage transients that can cause catastrophic component damages. The higher-capacitance bid disc, or “PNP”, is used to absorb remaining energy from the transient surge and reduce the voltage level to a safe level. The two bid discs are connected in parallel to a main conductor which is connected to the protected system.

The BSPD400480D3P working principle is based on the dynamic resistance of the diodes in each of the bid discs. When a transient surge occurs, the diode in the low-capacitance bid disc will act as a resistor and absorb the energy while the diode in the higher-capacitance bid disc will act as a diode and conduct the current. Since the current is conducted in both directions, the two directions of current will be balanced which will lead to a decrease in the amplitude of the transient surge. In addition, the two bid discs will also be in thermal equilibrium which will further reduce the amplitude of the transient surge.

The BSPD400480D3P utilizes a combination of technologies which enable it to provide efficient and reliable protection against high-frequency ESD transient pulses. The low-capacitance bid disc prevents catastrophic component damages while the high-capacitance bid disc absorbs remaining energy and reduces the voltage level of the surge to a safe level. This device is ideal for a wide range of applications where effective protection against ESD transients is needed.

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