SMBJ170A-TP Circuit Protection

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Transient Voltage Suppression Diodes (TVSs) provide a vital operation in many electronic circuit designs. The SMBJ170A-TP is one of these devices specifically designed to protect circuits, and related components, from exposure to voltage transients such as Electrostatic discharges, electrical fast transients, and inductive kickbacks. This TVS is specifically designed to protect power lines up to 400 Volts, making it an ideal protector for the likes of automotive, power supplies, and other related applications. As a particular example, the SMBJ170A-TP may be ideal for protecting a car with the modern 10V/16V DC power supply.

The TVS diode is a solid-state device with a semiconductor junction, in the case of this device an ultrafast diode with a maximum forward voltage drop of 1.77V. Thanks to its 1000W of peak pulse power dissipation with a pulse width of 10ms to 160µs, the SMBJ170A-TP is ideal in supplying continuous protection for power lines up to 170V AC or 400V DC. The device is efficient, managing to dissipate 600W of power for up to 100µs, and providing as such continuous peace of mind.

The SMBJ170A-TP uses a series of copper connecting strips to eliminate high contact resistance and to ensure manufacturing quality. The 1.6mm by 6.0mm size of this TVS also makes it practical for implementation of the device from a space conservation perspective; it may also be soldered for additional stability.

Working principle-wise, TVS Diodes are designed to respond immediately to the presence of a voltage transients, with the device switching on when it recognizes the presence of an Electrostatic discharge or an inductive kickback such as those caused by switching power supplies. Once the diode has switched, it reduces the voltage, and it resets automatically once the transient has passed. This ensures that any host circuit and its related components remain unexposed in the presence of a voltage spike.

The SMBJ170A-TP can be viewed as ideal for protecting many circuits. Able to shunt in the range of 50V to 400V, this device is best suited for use with a 10V/16V DC power supply; as we\'ve already described, it\'s common to find them being utilised in automotive applications. Nonetheless, the SMBJ170A-TP may also be found in power supplies, telecom and datacom systems, industrial and medical equipment and appliances, and many other applications.

Essentially, the TVS (Transient Voltage Suppression) in our case the SMBJ170A is designed to suppress transients caused by Electrostatic discharges, electrical fast transients, and inductive kickbacks, and this can be accomplished by the device shunt the voltage when it senses a surge, and then resetting automatically once the transient has passed. With the SMBJ170A-TP offering protection up to 400V, and dissipation of 600W of power for a 100µs duration, it is ideal in many applications protecting the circuits and components from such transients.

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