SMLJ14A-Q

The SMLJ14A-Q is a type of Transient Voltage Suppressor (TVS) diode, specifically designed for protection in high-voltage direct current applications like in telecom systems. This type of diode offers circuit protection from lightning surges or other transient events and, unlike other types of overvoltage protection solutions, it does so without allowing significant current flow. It is made with an avalanche breakdown voltage of 14 volts.

Application Field

The SMLJ14A-Q was designed as a high-performance overvoltage protection solution for DC high-voltage telecom applications including lineside systems, switchgear, protectors, and varistor products. It can also be used in other high-voltage applications such as electric vehicles and optical communication networks.

This diode can be effectively used in many ways. For example, in the event of a lightning strike, the SMLJ14A-Q can provide clamping protection that prevents damage from occurring. This is especially important in lineside systems as these are especially susceptible to transient events. The device is also used for protection from other electrical discharges and can be used in a number of applications to protect against transients.

Working Principle

The SMLJ14A-Q operates by blocking a sudden rise in voltage by redirecting the excess energy to ground. This type of diode utilizes an avalanche breakdown mechanism, meaning that whenever the voltage reaches a certain peak, the diode will switch abruptly to a low resistance state. This low-resistance state, or avalanching, will effectively dissipate the excess energy by redirecting it to ground. The SMLJ14A-Q has an avalanche breakdown voltage of 14 volts, allowing it to protect against even very high-voltage transients.

In addition to blocking transients, the SMLJ14A-Q provides a high degree of flexibility when it comes to the application of overvoltage protection. This is due to its wide operating voltage range, making it suitable for a number of different applications. The device also features a very low leakage current, allowing it to effectively protect circuits without compromising performance.