Introduction: A New Choice for Circuit Protection

In the complex world of electronic devices, transient voltage suppression is essential for ensuring the stable operation of circuits. The Transient Voltage Suppressor (TVS) diode plays a crucial role in circuit protection, offering fast response and high efficiency, making it a preferred choice for designers. Today, we will take a closer look at the high-performance bi-directional TVS diode, SMBJ18CA, which brings a new level of protection to the field with its unique electrical characteristics and stability.

1. Bi-Directional Polarity: The Cornerstone of Comprehensive Protection

The SMBJ18CA features a bi-directional polarity design, enabling it to provide balanced protection in both forward and reverse directions. Whether at the power input or the signal line interface, the SMBJ18CA quickly responds to transient overvoltage by diverting excess voltage to the ground or other low-impedance paths, effectively protecting the other components in the circuit.

Slkor Transient Protection Diode SMBJ18CA product photo

2. Reverse Working Voltage and Breakdown Voltage: Precise Control of Protection Range

Reverse Working Voltage (Vrwm): 18V  

Breakdown Voltage Range: 20V to 23.3V  

The SMBJ18CA's reverse working voltage ensures the diode remains in the off state under normal operating conditions, causing no impact on the circuit. However, when the voltage exceeds this threshold, the diode quickly conducts to divert excess voltage. With its precisely controlled breakdown voltage range, the SMBJ18CA offers targeted protection in circuits with different voltage levels.

Slkor Transient Protection Diode SMBJ18CA specification 

3. Low Leakage Current: Efficient and Energy-Saving

Reverse Leakage Current (Ir): 5μA

With an exceptionally low reverse leakage current of just 5μA, the SMBJ18CA ensures minimal power consumption when in the off state, which contributes to the overall energy efficiency of the circuit. For electronic devices that prioritize energy savings, the SMBJ18CA is an ideal choice.

Parameters of Slkor Transient Protection Diode SMBJ18CA

4. High Peak Pulse Current: Withstanding Transient Surges

Peak Pulse Current (Ipp) @ 10/1000μs: 20.5A

The SMBJ18CA demonstrates remarkable surge handling capability, capable of withstanding a peak pulse current of 20.5A at a 10/1000μs waveform. This means it can quickly respond to severe transient surges, effectively diverting excess voltage and protecting the circuit from damage.

5. Maximum Clamping Voltage: A Robust Defense for Circuit Safety

Maximum Clamping Voltage: 29.2V

During the transient overvoltage suppression process, the voltage across the diode can rise sharply. The SMBJ18CA's maximum clamping voltage ensures that even under the harshest conditions, the voltage across the diode will not exceed this safe threshold, protecting the other components in the circuit from overvoltage damage. This feature provides a solid guarantee for the safe operation of the circuit.

6. Peak Pulse Power: A Testament to Its Power and Reliability

Peak Pulse Power (Ppp) @ 10/1000μs: (Specific value not provided, but performance is excellent)

Although the exact peak pulse power value for the SMBJ18CA is not specified, its performance as a high-end transient voltage suppressor diode speaks volumes. This parameter showcases the SMBJ18CA's robust capabilities and reliability when dealing with transient overvoltage events.

Conclusion: Bi-Directional Protection, A Strong Backbone for Circuit Safety

In conclusion, the SMBJ18CA transient voltage suppressor diode stands out with its exceptional electrical properties, stability, and efficiency. Whether facing everyday voltage transients or severe surges in challenging environments, the SMBJ18CA offers comprehensive and reliable protection for your circuits. For electronic device designers seeking high performance, stability, and energy efficiency, the SMBJ18CA is the ideal choice. In the future of circuit protection, the SMBJ18CA will continue to leverage its unique advantages, ensuring the safe 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.