As the integration of modern electronic devices continues to rise and their functionalities become increasingly complex, the sensitivity of circuits to transient voltage surges also increases. These transient voltage spikes, which can be caused by lightning, electromagnetic interference, power fluctuations, and other factors, pose a serious threat to the normal operation of electronic equipment. To effectively address this challenge, the Transient Voltage Suppressor (TVS) diode was developed. Among them, the SMAJ5.0CA, a high-performance bidirectional transient voltage suppressor, has become a star product in the circuit protection field, thanks to its excellent parameters and wide range of applications.

1. Key Parameters of SMAJ5.0CA

The SMAJ5.0CA is a bidirectional transient voltage suppressor diode, which means it provides effective voltage protection in both forward and reverse directions. This feature offers higher flexibility and applicability in circuit design.

Slkor Transient Protection Diode SMAJ5.0CA product photo

Reverse Working Voltage (Vrwm): 5V  

The reverse working voltage is the maximum voltage at which the diode remains in the off state under reverse bias. With a reverse working voltage of 5V, the SMAJ5.0CA ensures stable operation under low-voltage conditions, preventing unnecessary conduction due to minor voltage fluctuations, thus avoiding excessive power consumption and heat generation.

Slkor Transient Protection Diode SMAJ5.0CA specification

Breakdown Voltage Range (6.4V to 7V)  

The breakdown voltage is the threshold at which the diode begins to conduct and clamp the voltage. The SMAJ5.0CA has a breakdown voltage range of 6.4V to 7V, ensuring it can respond quickly within the set voltage range to clamp overvoltage to a safe level, effectively protecting sensitive components downstream.

Parameters of Slkor Transient Protection Diode SMAJ5.0CA

Reverse Leakage Current (Ir): 800μA  

Reverse leakage current is the small current that flows through the diode when it is under reverse bias. The SMAJ5.0CA has a low reverse leakage current of only 800μA, which helps reduce power consumption under normal operating conditions, improve energy efficiency, and extend battery life.

Peak Pulse Current (Ipp) @ 10/1000μs: 43.5A  

Peak pulse current is the maximum transient current that the diode can withstand. The SMAJ5.0CA has a peak pulse current of up to 43.5A (for pulse widths of 10/1000μs), demonstrating its strong current handling capacity. This feature enables the diode to absorb and dissipate large amounts of transient current in a short period, providing effective protection to the circuit.

Maximum Clamping Voltage: 9.2V  

The maximum clamping voltage is the highest voltage the diode will reach when clamping an overvoltage. The SMAJ5.0CA’s maximum clamping voltage is 9.2V, ensuring that even under severe overvoltage conditions, the voltage in the circuit does not exceed this safe threshold, offering reliable protection to the equipment.

Peak Pulse Power (Ppp) @ 10/1000μs: 400W  

Peak pulse power refers to the maximum transient power the diode can withstand. The SMAJ5.0CA can handle up to 400W of peak pulse power (for pulse widths of 10/1000μs), making it highly capable of protecting circuits in high-power applications.

2. Applications of SMAJ5.0CA

Thanks to its excellent parameter characteristics and working principles, the SMAJ5.0CA is widely used in various electronic devices. For example, in home appliances, it can protect power circuits, control circuits, and communication interfaces from lightning strikes and power fluctuations. In communication equipment, it can protect signal lines and data interfaces from electromagnetic interference and electrostatic discharge. In industrial control systems, it can safeguard controllers, sensors, and actuators from transient voltage surges in industrial environments.

3. Considerations When Choosing SMAJ5.0CA for Circuit Design

When selecting the SMAJ5.0CA as a transient voltage protection component in circuit design, several factors need to be considered: First, the breakdown voltage range should be chosen based on the circuit’s operating voltage and the expected transient voltage surge levels. Second, the peak pulse current and peak pulse power handling capabilities should be selected according to the circuit's power requirements and the expected transient current. Lastly, factors such as the diode’s packaging form, installation method, and cost should also be taken into account.

Conclusion

In summary, the SMAJ5.0CA transient voltage suppressor diode, with its bidirectional polarity, stable reverse working voltage, suitable breakdown voltage range, low reverse leakage current, high peak pulse current, safe maximum clamping voltage, and outstanding peak pulse power handling ability, has become an indispensable component in electronic devices for circuit protection. As the design of electronic equipment continues to evolve, the SMAJ5.0CA will continue to play a vital role in ensuring the safe and stable operation of electronic devices.

About Slkor：

Slkor has research and development offices in Busan, South Korea, Beijing, China, and Suzhou, China. Most of the wafer manufacturing and packaging and testing are carried out within China. The company employs and collaborates with individuals and organizations worldwide, with a laboratory for product performance and reliability testing and a central warehouse located at its headquarters in Shenzhen. Slkor has filed for over a hundred invention patents, offers more than 2,000 product models, and serves over ten thousand customers globally. Its products are exported to countries and regions including Europe, the Americas, Southeast Asia, and the Middle East, making it one of the rapidly growing semiconductor companies in recent years. With well-established management systems and streamlined workflows, Slkor has rapidly enhanced the brand awareness and reputation of its "SLKOR" brand through its outstanding quality and standardized services. Its product range includes three major series: diodes, transistors, and power devices, with recent introductions of new products such as Hall elements and analog devices, expanding its presence in sensors, Risc-v microcontrollers, and other product categories.