In the 5G era, high-density deployment of base stations has become the norm. However, harsh outdoor environments such as thunderstorms, high temperatures, and high humidity have laid down "invisible bombs" for the 48V power system - overvoltage shocks caused by lightning surges. Even minor incidents can lead to equipment downtime, while severe cases can directly burn out the core components, seriously affecting the continuity of the communication network and keeping the operation and maintenance costs high. As the "lifeline" for the stable operation of base stations, power lightning protection has long been a core technical challenge in the industry.

Most traditional lightning protection solutions adopt a multi-level combination design of "GDT + MOV + decoupling components + low-power TVS". However, the downside of this solution are becoming increasingly prominent: the aging of components like MOV is irreversible, and the protection capability will gradually decline over time, requiring frequent replacements; the coordination of the action timing of multiple components is complex, and even a slight deviation can lead to protection failure; at the same time, the use of too many components will occupy a large amount of PCB space, which is contrary to the miniaturization and high-density design trend of 5G base stations, and will also bring additional energy consumption and heat dissipation pressure. In areas with frequent thunderstorms, the failure rate of lightning strikes at base stations remains consistently high.

In response to these industry pain points, Shanghai Leiditech Electronic, which has been deeply engaged in communication lightning protection technology research and development for many years, has launched the Blue Baby high-power TVS series products. This series not only fully complies with core lightning protection standards for the communication industry such as GB 50689-2011, but also with its innovative design of "single device replacing multi-level combination", it breaks through the technical limitations of traditional solutions and provides an efficient, reliable and compliant professional lightning protection solution for 48V base station power supplies.

1、Specifically designed for base station power supply, with core performance precisely tailored to meet requirements

The Blue Baby AK20 series high-power TVS is a protective device specially developed by Leiditech Electronic for the harsh surge test environment of AC/DC circuits (especially the 48V DC power supply system of base stations). Each of its performance parameters precisely matches the high reliability requirements of communication equipment:

• • Extremely low clamping voltage, more precise protection: Many people may not be aware of the function of "clamping voltage" - in simple terms, it is the "safety threshold" that TVS uses to limit transient overvoltages. The clamping voltage (Vc) of the Blue Baby series is ≤ 80V (as for the 48V dedicated model above), compared to traditional MOV solutions, it can more quickly and precisely "compress" the overvoltage generated by lightning strikes within the safe range, preventing the back-end equipment from being broken by overvoltage.
  • Response speed is in the millisecond range, and there are no blind spots for lightning strikes: The duration of the lightning surge impact is measured in nanoseconds. The response speed of the protective device directly determines the protection effect. The response time of the Blue Baby TVS is as low as 0.5ns, which is equivalent to "like lightning" in discharging the surge energy, leaving no chance for overvoltage to harm the equipment.
  • Two-way protection + Flexible deployment through series and parallel: Applying a two-way protection design, it can effectively resist surge voltages coming from any direction; supporting series and parallel combination deployment, it enables the rapid establishment of an ultra-high surge current protection scheme, and can easily cope with the extreme lightning strikes of outdoor base stations.

  2、Robust parameters, balancing protection and practicality

In terms of electrical parameter design, the Blue Baby series has fully taken into account the complex usage scenarios of base stations, achieving "maximum protection and maximum adaptability":

• The peak pulse current (IPP) ranges from 10 to 20 kA. There are multiple series available, including 1KA, 3KA, 6KA, 10KA, 15KA, and 20KA. These models are suitable for both ordinary thunderstorm areas and strong lightning strike zones.
• Peak power (Pppm) is ≥ 3000W. It can quickly absorb and dissipate the huge energy generated by lightning strikes, preventing damage to itself.
• The operating temperature range is wide, extending from -55℃ to +150℃, and the storage temperature range also covers -55℃ to +150℃. It can operate stably in both the cold northern regions and the hot southern regions, and it complies with the exemption requirements for high-temperature welding (refer to EU Directive Annex Notes 7).

More importantly, the Blue Baby series achieves "single-device integration of energy dissipation and clamping functions" - without the need for additional decoupling components and final-stage protection devices, it completely resolves the energy coordination problem of traditional multi-stage solutions. This design not only simplifies the circuit design process but also reduces the PCB space occupancy by more than 60% compared to traditional solutions, perfectly met the layout requirements of 5G base stations for miniaturization and high density.

3、Multi-scenario anti-interference, compliance fully achieved

The interference faced by base station power supplies is not limited to lightning strikes and surges. Static electricity and electrical fast transient pulse groups (EFT) can also affect the stability of the equipment. The Blue Baby series TVS not only focuses on lightning protection, but also can "protect multiple functions with one device":

• Complies with IEC 61000-4-2 (ESD) standards, capable of withstanding 15kV air discharge and 8kV contact discharge, preventing signal disorder and component damage caused by static electricity in the equipment;
• Complies with IEC 61000-4-4 (EFT) standards, effectively resisting the impact of electrical fast transient pulse clusters, ensuring the continuous and stable output of the power supply system.

For the communication industry, compliance is a crucial prerequisite for selection. The Blue Baby series fully meets the industry standards, ensuring that base station operations do not need to worry about compliance risks.

4、Domestication innovation promotes cost reduction and efficiency improvement in the industry.

The Leiditech EMC team emphasized that the core of power supply lightning protection for base stations lies in "low impedance, short path, and precise adaptation". The innovation of the Blue Baby high-power TVS lies in replacing the traditional multi-level stacking design with a single component - it not only meets the surge protection requirements of the 48V power system, but also significantly reduces the implementation difficulty and overall cost (reducing component procurement, simplifying assembly, and lowering the frequency of operation and maintenance).

As a representative of domestically produced high-power TVS, the launch of Shanghai Leiditech Electronic Blue Baby series has not only broken through the technical limitations of traditional lightning protection solutions, but also promoted the large-scale application of domestic components in the communication industry. For the construction and operation parties of base stations, choosing Blue Baby means choosing a one-stop solution of “efficient protection + space adaptation + cost optimization + compliance guarantee”, laying a "safety shield" for the stable operation of 5G base stations.