NEWS

Recently, the power bank industry has been mired in constant troubles. A well-known brand has recalled its products and had a large number of 3C certificates revoked. Since June 28, 2025, the Civil Aviation Administration of China (CAAC) has implemented a new regulation prohibiting power banks without 3C certification marks from being carried on board aircraft. Negative news related to "safety" has come one after another, once again pushing the word "safety" to the center of public attention. This is not just a crisis for a single brand, but also reflects a profound transformation that the entire electronics industry is undergoing - shifting from a price war to a battle for safety.

From power circuits to terminal equipment, the reliability of every protection link is directly related to the safety factor of the product. "Safety is the fundamental principle" is not a slogan, but a fundamental criterion for the survival and development of enterprises.

01 Implementation of 3C Compulsory Product Certification and Scope of GB 4943.1

The new version of the GB 4943 national standard covers three major categories of equipment: audio-visual equipment, information technology equipment, and communication technology equipment. The 3C compulsory product certification catalog includes 13 types of electronic products. Common items in our daily lives such as speakers, televisions, computers, printers, mobile phones, as well as supporting chargers and mobile power supplies, all fall within the scope of this standard.

02 Requirements of the New GB 4943 National Standard for Safety Protection Components (MOV, GDT, SPD)

It is worth mentioning that the composite device KOV@G series can better meet the new standards. Through Ruilongyuan's PCIC test verification, it was found that the surge spikes of the KOV@G series are almost eliminated. This is due to the built-in GDT with more sophisticated technology, which can also meet the rated voltage requirements specified in the standard.

• Test Waveform of Conventional GDT in Series with MOV

• Waveform Diagram 1: Operation waveform of conventional MOV in series with GDT

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• Test Waveform of Composite Component

  Waveform Diagram 2: Ruilongyuan KOV@G series (8/20μs, 10KA positive direction, residual voltage 1.17kV - the GDT spike disappears)

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03 1+1>2: The Safety Philosophy of Composite Protection Units

On the path of pursuing safety, the selection and design of components are crucial. In traditional solutions, the simple superposition of discrete components (such as GDT + MOV) may have hidden risks such as insufficient coordination and protection gaps. The composite protection unit (KOV solution), through an integrated design of "1+1>2", has redefined the standard for safety protection.

• More Reliable Collaborative Protection: The composite protection unit integrates multiple protection functions into one. After optimized design and rigorous testing, it ensures seamless connection of each protection link, avoiding the risk of protection failure caused by improper matching of discrete components.
• More Streamlined Safety Redundancy: While reducing the PCB occupied area by 19.3% and cutting material management costs, the composite device also reduces safety hazards caused by omissions in the assembly process by minimizing solder joints and optimizing processes.
• More Compliant Design Guarantee: It meets the latest standards such as GB4943-1:2022. There is no need to redesign the PCB to meet safety requirements, avoiding compliance risks from the source.

04 The Safety Definition of Surge Composite Devices

1. Simple surge protection components ensure the safety of equipment.
2. Simple surge devices (such as MOV and GDT) may cause safety hazards such as heat generation or combustion due to aging and overvoltage (TOV).
3. The selection of composite protection units solves the inherent safety risks of simple surge devices.

This "integration" thinking not only makes safety protection more efficient but also achieves an upgrade from "passive protection" to "active safety".

05 Composite Protection Units: Born for Safety, Empowering Value

• In Terms of Safety: Its integrated design eliminates the coordination blind spots of discrete components, resulting in more stable protection performance.
• In Terms of Cost: For 100,000 finished products (1KK), it can save approximately 32,000 yuan in PCB area costs, 20,000 yuan in material management costs, and 250,000 yuan in production costs, with a total cost saving of over 300,000 yuan.
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• In Terms of Efficiency: It simplifies the design process and reduces quality control links, enabling products to meet standards and launch faster.
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Behind these advantages lies the composite protection unit's practice of the "safety first" concept - using technological innovation to reduce safety risks and integrated design to enhance comprehensive value.

Safety premium is the most worthwhile investment. When the industry collectively reflects on the old path of "trading low prices for market share", "safety premium" is becoming a new competitive barrier. Consumers are willing to pay higher prices, essentially paying for "peace of mind"; when enterprises choose composite protection units, they are also investing in the safety reputation and long-term value of their products.