SMBJ18CA-TP

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TVS diodes are a type of semiconductor device used for voltage protection and effective surge protection. SMBJ18CA-TP is one of the most common types of transient voltage suppression (TVS) diodes used in protection and switching circuits. It is a unidirectional bi-direction device designed specifically for low voltage applications including telecom and other consumer and industrial equipment.

This device has an 18V maximum working voltage at +85°C junction temperature and a surge current of 800A peak. The peak pulse power rating is 400W @ 8/20µs and the reverse leakage current is 0.1µA at 18V. The temperature coefficient of the Schottky diode is approximately -2mV/C. It has an operating temperature range from -50°C to +150°C storage.

The SMBJ18CA-TP is well suited for both portable and non-portable applications in consumer electronics, computers, communication systems, automotive and industrial applications. It can be used to protect sensitive devices and sub-circuits from overvoltage transients such as microcontroller pins, I/O ports, LEDs, and power rails. The device is ideal for protection against ESD, Latch-up, and EFT and even protects against an accidental reverse polarity.

The TVS diode operates as a protective device by clamping the transient voltages to a safe level. It can withstand very high surge energy levels without either self-destructing or losing its protective capabilities. The working principle of the diode is quite simple. When the input voltage to the device is less than the breakdown voltage, there is no current flow in the diode. However, when the input voltage exceeds the breakdown voltage, a large pulse spike is generated, allowing the current to flow quickly through the device.

The SMBJ18CA-TP diode has high performance and reliable protection with its low clamping voltage. It is capable of suppressing voltage transients of low energy as well as high energy in a very short time period. The reverse leakage current is very low, making it suitable for use in systems with sensitive micro components. In addition, its very low capacitance makes it desirable for high speed data lines. With its temperature coefficient of -2mV/C, the device ensures reliable protection even at fluctuating temperatures.

In conclusion, the SMBJ18CA-TP TVS diode is an important device used for protection and switching circuits. It is capable of providing superior surge protection for consumer electronics, computers and communication systems, automotive and industrial applications. It is highly reliable and has a low clamping voltage, low leakage current, and low capacitance.

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