SMDJ85 Circuit Protection

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The SMDJ85 is classified as a TVS (Transient Voltage Suppressor) diode, which is used for a variety of applications. In this article, we will discuss the typical applications of the SMDJ85, as well as the working principles behind it.

The SMDJ85 is a unidirectional TVS diode that is used to protect fairly sensitive electrical components from transients, such as ESD (Electro Static Discharge). This diode is widely used to protect input and output interfaces in electronic products, such as portable devices, automotive electronics, and consumer equipment. The SMDJ85 is particularly suitable for applications that require a low power dissipation of the protection circuit. It is also recommended for use in applications such as line termination, surge suppression, and spike protection.

The SMDJ85 is a medium power transient voltage suppressor, with a maximum peak pulse power rating of 400 W. The diode is available in Surface Mount and DO-214AB package format. It has a reverse breakdown voltage of up to 85 V and is capable of handling clamping current up to 5 A (10/1000 microsecond pulse waveform). Additionally, the SMDJ85 has a very low leakage current of less than 5 nA at room temperature.

The SMDJ85 works by diverting the transient energy to ground, rather than allowing it to pass through to the system. The suppression element in the diode is designed to switch from an off-state to an on-state, as soon as the voltage exceeds the reverse breakdown voltage. At this point, the diode will then clamp the voltage to the reverse breakdown voltage, as well as provide an electrostatic discharge path to ground. Once the transient has passed, the suppression element will then switch back to its off-state, allowing normal operation to continue uninterrupted.

In summary, the SMDJ85 is a widely used unidirectionalTVS diode for a variety of applications, such as line termination, surge suppression, and spike protection. This diode is designed to protect circuit components from transients, such as ESD, and is available in either SMT or DO-214AB packages. It is capable of handling peak power ratings up to 400 W, has a reverse breakdown voltage of up to 85 V, and a leakage current of less than 5 nA.

The specific data is subject to PDF, and the above content is for reference