1. Introduction  

With the rapid development of remote sensing technology, it has become increasingly important in fields such as environmental monitoring, resource exploration, and disaster early warning. Remote sensing equipment is typically deployed in complex and dynamic environments, facing various electromagnetic interference and transient overvoltage threats. As an efficient overvoltage protection component, the Transient Voltage Suppression (TVS) diode can effectively suppress these transient overvoltages, protecting remote sensing devices from damage. This paper explores the application of the SMAJ7.0A transient voltage suppression diode in remote sensing technology.

Slkor Transient Protection Diode SMAJ7.0A product photo

2. Key Parameters of SMAJ7.0A Transient Voltage Suppression Diode  

The SMAJ7.0A TVS diode uses a standard surface-mount SMA package and has a series of key parameters that make it highly suitable for remote sensing applications. Its reverse working voltage (Vrwm) is 7V, which means that when the normal operating voltage is below 7V, the diode remains in the off state and does not affect the circuit. When the voltage exceeds 7V, the diode starts to conduct, providing protection. The breakdown voltage (minimum value) is 7.78V, and the breakdown voltage (maximum value) is 8.60V. This range ensures the diode can reliably conduct within a certain voltage range, clamping the overvoltage to a safe level. The reverse leakage current (Ir) is 200μA, which helps to reduce power consumption and improve circuit efficiency. The maximum clamping voltage is 12V, meaning the diode can clamp transient overvoltages to below 12V, protecting subsequent circuits from damage.

Slkor Transient Protection Diode SMAJ7.0A specification

Parameters of Slkor Transient Protection Diode SMAJ7.0A

3. Advantages of SMAJ7.0A in Remote Sensing Technology  

(1) Fast Response Time  

Remote sensing equipment is often deployed in complex environments, making it vulnerable to transient overvoltages from sources like electrostatic discharge (ESD) or lightning strikes. The SMAJ7.0A TVS diode has an extremely fast response time, typically less than 1.0ps, allowing it to quickly conduct the moment a transient overvoltage occurs and divert the overvoltage to the ground, thus protecting sensitive electronic components in remote sensing devices. For instance, in satellite remote sensing systems, satellites in orbit may experience transient overvoltage due to cosmic radiation interference. The SMAJ7.0A can respond in time, clamping the overvoltage to a safe level, ensuring the satellite’s normal operation.

(2) High Surge Absorption Capability  

Remote sensing equipment may face significant surge current impacts, such as those caused by lightning-induced surge currents. The SMAJ7.0A can handle peak power of 400W, effectively absorbing surge currents under conditions of a 10×1000μs waveform with a 0.01% duty cycle, protecting circuits from damage. Its peak pulse current reaches 33.3A, making it capable of withstanding large transient current impacts and providing reliable overvoltage protection for remote sensing equipment.

(3) Low Leakage Current Characteristics  

In remote sensing technology, certain low-power or high-precision acquisition circuits are highly sensitive to leakage currents. The SMAJ7.0A has a reverse leakage current (Ir) of only 200μA, which is relatively low and does not significantly affect the normal operation of the circuit. This also helps reduce circuit power consumption and improves signal acquisition accuracy.

(4) Compliance with Environmental Standards  

With increasing awareness of environmental protection, electronic products are subject to stricter environmental regulations. The SMAJ7.0A complies with RoHS and other environmental standards, being free from harmful substances, which aligns with the green and environmentally friendly requirements of the remote sensing technology field, supporting the sustainable development of remote sensing equipment.

4. Case Study  

Taking a specific model of remote sensing satellite as an example, this satellite is equipped with numerous high-precision sensors and electronic devices, which have strict voltage stability requirements. During the satellite’s launch and operation, it is susceptible to various transient overvoltage threats. By installing SMAJ7.0A transient voltage suppression diodes at key points such as the satellite's power system and signal transmission lines, the satellite's electronic equipment is effectively protected. During the satellite’s launch phase, strong electrostatic discharge may occur, and the SMAJ7.0A can rapidly respond, clamping the overvoltage to a safe level, ensuring the satellite’s successful launch. During satellite operation, faced with various radiation and electromagnetic interference from space, the SMAJ7.0A continues to protect the satellite’s electronic equipment, ensuring its normal operation.

5. Conclusion  

The SMAJ7.0A transient voltage suppression diode, with its excellent performance parameters, plays a crucial protective role in remote sensing technology. Its fast response time, high surge absorption capability, low leakage current, and precise clamping voltage control enable it to effectively resist various transient overvoltage impacts, ensuring the stable operation of remote sensing equipment. In practical applications, by appropriately selecting and configuring the SMAJ7.0A, the reliability and stability of remote sensing systems can be significantly enhanced, providing strong support for the development of remote sensing technology. As remote sensing technology continues to advance, the performance requirements for electronic components will also increase, and the SMAJ7.0A is expected to see broader applications in more fields, continually optimized and improved to meet the ever-changing demands.

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.