SMBJ350C

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TVS (Transient Voltage Suppressor) diodes are an important component in any circuit protection system when dealing with sudden and hazardous voltage and current surges. The SMBJ350C is a popular TVS diode that is widely used in the industry due to its voltage clamping capability and robustness. This article will discuss the application field and working principle of the SMBJ350C TVS diode.

Application Field

The SMBJ350C TVS diode is suitable for a wide range of application fields. It can be used in various consumer electronics products, such as digital cameras, tablets, and mobile phones. It is also suitable for use in automotive and industrial applications, such as EMI filters, non-isolated AC/DC converters, and other protection circuits. The SMBJ350C is designed to survive voltage surges up to 350V and can absorb up to 600W peak pulse power.

Due to its low leakage current and high capacitance, the SMBJ350C can be used in computer networking applications that require high data rates. It can also provide reliable protection for power supplies, which require precise voltage regulation. In addition, the SMBJ350C can be used to reduce EMI in high-speed bus systems.

Working Principle

The SMBJ350C TVS diode is an unidirectional device that conducts current in only one direction. When subjected to overvoltage, it will begin to conduct current and dissipate the excess energy as heat. This will protect the circuit from damage due to excessive voltage and current.

The SMBJ350C has two important parameters: peak pulse power and clamping voltage. The peak pulse power is the maximum power (in watts) that the TVS diode can dissipate without damage. The clamping voltage is the voltage at which the diode begins to conduct and absorb the excess energy. The clamping voltage of the SMBJ350C is typically 350V, but may vary depending on the device’s specifications.

When the current through the diode is greater than a certain value, the diode will begin to conduct and absorb the excess energy. This is known as the avalanche breakdown mode. The avalanche breakdown mode is also known as the Zener breakdown mode, owing to the fact that the voltage drop across the diode is essentially constant during avalanche breakdown.

The SMBJ350C is also capable of absorbing transients that are up to 10x its clamping voltage. This can be extremely beneficial in applications where high voltage transients are common, as the TVS diode will be able to protect the circuit from such events.

In summary, the SMBJ350C is a robust and reliable TVS diode that is suitable for a wide range of applications. It has a clamping voltage of 350V and can absorb up to 600W peak pulse power. Its low leakage current and high capacitance make it an ideal choice for computer networking and other high-speed applications. Finally, its ability to absorb transients up to 10x its clamping voltage makes it an excellent choice for circuits that are exposed to high voltage transients.

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