SMB8J30CA-E3/5B

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TVS – Diodes

Transient Voltage Suppressor (TVS) diodes are a type of diode developed to protect electrical components from damage due to excessive voltages. TVS diodes can be used to protect everything from computer circuits to printed circuit boards. The SMB8J30CA-E3/5B TVS diode is a low-capacitance, fast response diode used to protect high-speed data lines and power circuits from voltage transients that can cause system malfunction or data corruption.

Application Field

The SMB8J30CA-E3/5B is designed for surge voltage suppression in high-speed data lines. This includes applications in short-circuit current-limit devices, ESD protection, and reverse voltages. It is suitable for applications such as Universal Serial Bus (USB) 2.0, Ethernet, and Giga-bit Ethernet. Its high surge capability and low capacitance make it well suited for these types of applications. This diode is also suitable for automotive and industrial applications since it has a wide operating temperature range of -55°C to +125°C.

In automotive applications, the SMB8J30CA-E3/5B is used to protect circuits from transient spike voltages caused by high-energy ignition systems, and is also used to regulate the power supply. In industrial applications, it can be used to protect electrical systems from power surges caused by lightning strikes or other external sources.

Working Principle

The SMB8J30CA-E3/5B is specifically designed to protect components from electrostatic discharges (ESD) and transient over voltages. It works by utilizing an internal avalanche breakdown voltage at which the diode begins to conduct. This reduced voltage can then be used to control the output of the circuit, thereby providing a safe operating environment.

When a transient voltage is applied to the diode, the avalanche breakdown characteristics reduce the voltage applied to the circuit. In addition, the fast response time of the SMB8J30CA-E3/5B helps to minimize the amount of damage caused by the transient voltage. This faster response time also reduces the amount of energy absorbed by the diode.

In operation, the reverse-biased diode is designed to remain off until the reverse-breakdown voltage is exceeded. At this point, the diode turns on and provides a conductive path to ground. This path provides the necessary current to limit the voltage and protect the device from damage. After the transient voltage has subsided, the diode will automatically reset itself and return to its off state.

The SMB8J30CA-E3/5B is a low-capacitance, fast response diode used to protect high-speed data lines and power circuits from transient over voltages. It is designed for surge voltage suppression in high-speed data lines such as USB 2.0, Ethernet, and Giga-bit Ethernet, and is suitable for applications in automotive and industrial applications due to its wide operating temperature range of -55°C to +125°C.

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