SMBJ20D-M3/I

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Transient Voltage Suppressors (TVS) devices are typically used in various electronic applications for protection against voltage spikes and transients. In particular, they are commonly used to protect circuit boards, terminal blocks, and wiring systems against electrostatic discharge (ESD), lightning and static electricity. The SMBJ20D-M3/I is one type of TVS diodes used in these applications.

The SMBJ20D-M3/I is a 20V Bidirectional Transient Voltage Suppressor Diode. It is designed to protect applications from transient surge pulses caused by electrostatic discharge (ESD) or lightning. It has an operation voltage range of 5.7 to 20V and a peak power dissipation of 600 Watts (TPWM). The diode also has a maximum working peak pulse current of 20 Watts, which makes it suitable for a wide range of applications. At low reverse voltage approximating 5.7V, the SMBJ20D-M3/I is typically used to protect electronic equipment from ESD, surge pulses, and ground loop current.

Typical applications of the SMBJ20D-M3/I include protection of computers, peripherals, industrial controllers, and consumer electronics. In particular, the device is ideal for application in telecom, medical, avionics, and automotive fields. It is also suitable for over voltage or over current protection in motor control, robotics, and instrumentation applications.

The SMBJ20D-M3/I has a low circuit capacitance which helps reduce the noise when placed at the input of the power supply. It can also be used as a signal line protection device, providing surge and ESD protection against both positive or negative transient surges. This makes the SMBJ20D-M3/I ideal for use in applications where a fast response time is required.

The working principle of the SMBJ20D-M3/I is simple. When an unexpected voltage exceeds the breakdown voltage, an avalanche breakdown occurs which initiates conduction. The current can continue to flow in both directions until the voltage is reduced to its predetermined level. The diode also has low clamping voltage, which helps reduce power loss when in use.

The SMBJ20D-M3/I is also designed to self-recover after a surge so that it can be used again. This makes it a suitable option for applications where frequent protection is needed. Additionally, it can be used with other components such as capacitors or resistors to provide additional protection.

In conclusion, the SMBJ20D-M3/I is an effective and reliable solution for protection against transient voltage surges and transients. Its low circuit capacitance and low clamping voltage make it suitable for a wide range of applications including computer, industrial and consumer electronics. The diode is also designed to self-recover after a surge, ensuring that it can be used again.

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