SMBJ90CA

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SMJ90CA TVS - Diodes are a widely used type of diode with multiple fields of application. The diode is a three-terminal device that is commonly employed in high-voltage applications, acting as a protection device against transients due to electrostatic discharge, lightning, and more. These components can handle high switching transients, which can be beneficial in large-scale applications such as lightning protection. Moreover, they can provide a high level of protection due to their reverse breakdown voltage.

The SMJ90CA diode is a 5.0 V bidirectional TVS (Transient Voltage Suppression), soldered directly on the PCB. It features a low leakage current, fast response time and is RoHS (Restriction of Hazardous Materials) compliant. This type of diode has a nominal working voltage of 5.0V, a maximum Continuous Operating Voltage (VR=5.5V), a minimum breakdown voltage of 6.5V, typical dynamic resistance of 0.5 Ohm and maximum surge capability of 17A (8/20µs). The diode has been designed to be compatible with all standard Industrial Automation EMI/EMC requirements.

The main application field for this diode is providing protection against high transient voltages, mainly due to their high reverse break down voltage and low dynamic resistance, which makes them ideal for applications such as lightning protection. Additionally, it is suitable for use in telecom and automotive applications, where a high level of protection is required. In addition, it is used in circuit boards for consumer appliances, or any other application requiring protection from high transient voltages such as overvoltage, electrostatic discharges, and inductive switching.

In terms of its working principle, the diode is constructed with two oppositely doped layers of semiconductor material, known as the anode and cathode. When a voltage exceeding the reverse breakdown voltage of the diode is applied, an avalanche breakdown occurs, which results in the diode breaking down and a high current flowing through it. This current is then limited to the current rating of the diode, thus providing the necessary protection from the high transient voltages. In addition, the diode also provides clamping protection, which helps to reduce the voltage levels to the values required for the correct functioning of the protected circuit boards.

In conclusion, the SMJ90CA diode is a versatile and widely used protection device against transient voltages. Its low dynamic resistance and fast response time makes it suitable for a variety of applications, from consumer appliance circuit boards protection to telecom and automotive protection. Furthermore, its major application field is in the area of lightning protection, where its reverse breakdown voltage allows for a high degree of protection.

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