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TVS - Diodes

TVS (Transient Voltage Suppressors) diodes are an important component in electronic circuits for protecting them against power surges, electrostatic discharges, pulses, spikes, and other electrical damage. The SMBJ18A-QH TVS diode is a special two-terminal bi-directional surge protection device commonly used to protect equipment and components against electrical damage.

Application Field of SMBJ18A-QH

The SMBJ18A-QH TVS diode can serve a variety of applications, such as inductive load switching, power supply over-voltage protection, and AC/DC power line protection. The TVS diode can be used in a variety of consumer electronics, including cellular phones, portable media players, digital cameras, GPS receivers, and PDAs. The SMBJ18A-QH is also suitable for industrial applications, such as protection of motors and drives, circuit boards, and other equipment from transient voltage surges.

Working Principle of SMBJ18A-QH

The SMBJ18A-QH TVS diode operates by diverting damaging current away from sensitive components and equipment. When an electrical surge is encountered, the diode comes into effect and is triggered into action, with the voltage rising sharply and connecting two terminals. The connection acts as a short circuit that carries the surge current away from any sensitive circuits or components connected to it, thus protecting them from damage.

After the electrical surge has passed, the diode will reset itself and become inoperative, allowing normal electrical operation to resume. The TVS diode is usually designed for single-use, meaning it can only be triggered once and must then be replaced for the circuit or device to be protected again.

Conclusion

The SMBJ18A-QH TVS diode is a reliable and effective two-terminal, bi-directional surge protection device. It provides excellent protection against power surges, transients, spikes, and other electrical damage, allowing sensitive devices and equipment to remain protected. The device is suitable for a wide range of consumer electronics and industrial applications, such as machinery, circuit boards, and other equipment.

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