In today's rapidly advancing electronics industry, Transient Voltage Suppressor Diodes (TVS) have become essential components for protecting sensitive electronic devices from transient voltage surges, thanks to their exceptional surge voltage suppression capabilities. This article delves into the SMBJ40CA model of TVS diode, providing a detailed analysis of its key parameters—polarity, reverse working voltage, breakdown voltage, reverse leakage current, peak pulse current, maximum clamping voltage, and peak pulse power—highlighting its unique advantages and applications in circuit protection.

1.Device Overview  

The SMBJ40CA is a bidirectional transient voltage suppressor diode, which means it can effectively protect against both positive and negative voltage surges. Its design is intended to absorb and dissipate transient energy in the circuit, thus protecting subsequent components from damage.

2. Key Parameter Analysis

Polarity: The bidirectional nature of the SMBJ40CA allows it to handle both positive and negative transient voltage surges without distinction, simplifying circuit design and reducing complexity.  

Reverse Working Voltage (Vrwm): With a reverse working voltage of 40V, the SMBJ40CA can withstand a maximum reverse voltage of 40V under normal operating conditions without breaking down. This ensures stability within its operational range.  

Slkor Transient Protection Diode SMBJ40CA product photo

Breakdown Voltage: The breakdown voltage of the SMBJ40CA ranges from 44.4V to 51.1V. When the voltage in the circuit exceeds this range, the TVS diode will quickly break down and conduct, limiting the transient voltage to a safe level.  

Reverse Leakage Current (Ir): Under reverse working voltage, the reverse leakage current of the SMBJ40CA is only 5μA. This extremely low leakage current helps reduce power consumption and heat generation during normal operation.  

Slkor Transient Protection Diode SMBJ40CA specification

Peak Pulse Current (Ipp): Under 10/1000μs pulse conditions, the SMBJ40CA can withstand a maximum peak pulse current of 9.3A. This parameter reflects the diode's ability to respond to rapid voltage changes, serving as a key indicator of its transient suppression performance.  

Maximum Clamping Voltage (Vclamp): Once the TVS diode breaks down and conducts, it clamps the voltage to a maximum clamping voltage. The SMBJ40CA's maximum clamping voltage is 64.5V, helping to ensure the safe operation of subsequent circuits.  

Peak Pulse Power (Ppp): Under 10/1000μs pulse conditions, the SMBJ40CA can withstand a maximum peak pulse power of 600W. This parameter indicates the diode's capacity to endure high-energy transient shocks and is an important indicator of its durability and reliability.

Parameters of Slkor Transient Protection Diode SMBJ40CA

3. Application Advantages and Features
 

The SMBJ40CA exhibits broad application potential across various fields due to its outstanding transient suppression performance and stable electrical characteristics. Its bidirectional nature simplifies circuit design and reduces costs. Additionally, its high breakdown voltage, low leakage current, and strong peak pulse current tolerance make it highly effective in protecting sensitive electronic components from transient voltage surges. The compact packaging and high-temperature operation capability of the SMBJ40CA also make it suitable for circuit protection in harsh environments.

4. Conclusion  

In conclusion, the SMBJ40CA, as a bidirectional transient voltage suppressor diode, has become a crucial component in the field of circuit protection due to its exceptional electrical performance and wide application potential. By analyzing its key parameters, we can clearly see its outstanding performance in mitigating transient voltage surges. As the electronics industry continues to evolve, the SMBJ40CA will play an increasingly important role in ensuring the safe and stable operation of circuits. For professionals in the semiconductor industry, a thorough understanding of the SMBJ40CA's characteristics and applications will help them better address circuit design challenges and drive innovation and development in electronic products.

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.