The World’s Leading Surge Protection Device Manufacturers
| Company | Technical Innovation | Service Assurance | Special Certifications |
| ABB (Switzerland) | Patented MOV; 15kA (10/350µs) direct lightning resistance; low 1.2kV prot. voltage; no decoupling coils. | N/A | IEEE standards adopted. |
| DEHN SE (Germany) | “Dual-port isolation” for common-mode interference; patented SINEC for µs fault location. | DEHNrisk lightning risk assessment software. | IEC 61643 standards leader; Class I+II dual cert. |
| Phoenix Contact (Germany) | “PlugTec” pluggable SPD; remote fault alarm; thermal fuse protection. | 30% lower O&M costs (PlugTec). | N/A |
| ECS (United States) | Patented ORN dynamic tracking filtering; chemical packaging for better heat dissipation. | “25 years free replacement”; consulting for central enterprises. | NEMA 4 housing standard. |
| Bourns (USA) | Dual-rail AC SPD; integrated TD+ thermal circuit breakers; 40% smaller board area via modular design. | Real-time SPD status via optical monitoring box. | IEC Class I+II certified (1270/1280 series). |
| Citel (France) | GDT (Gas Discharge Tube) tech: fast nanosecond response; withstands high-energy surges. | Customized solutions provided. | UL, KEMA, TUV. |
| Raycap (Greece) | Smart meter & energy management tech (from Iskra); Strikesorb® & RaycapSTAX™ for 5G/PV. | N/A | NEMA 4X (dust/waterproof); extreme temp/corrosion compatible. |
| Weidmuller (Germany) | Varistor exhaust pipe tech; multi-level coordinated protection; no decoupling coils needed. | Intelligent status management: optical warning (yellow/red); “PUSH IN” remote signals. | Leads IEC/EN 61643-11:2012 revision; no backup fuses needed below 315A. |
| Thor (China) | Core patented SPD technologies. | Industry-leading quality assurance; full lifecycle consulting (selection, integration, maintenance). | NEMA 4 (fire/water/explosion-proof). |
ABB (Switzerland)
A global electrical automation giant, SPD market share ranks among the top three, products cover full protection levels from Type 1 to Type 3, and technical standards are adopted by IEEE and other multinational organizations.
The SPD product line is integrated into its smart grid solution and is suitable for 57V-600V power grid systems.
Patented MOV technology can resist direct lightning strikes (15kA, 10/350µs waveform), with protection voltage as low as 1.2kV, without the need for decoupling coils.
Focusing on the high-end industrial market, it provides lightning protection systems for Tesla Super Factory, Singapore Power Grid, etc., and launches the OVR TC series for data centers.
DEHN SE (Germany)
Leading brand of lightning protection technology in Europe, leading the formulation of IEC 61643 standards, and the preferred SPD supplier for global landmark buildings (such as the Burj Khalifa in Dubai).
The product has passed Class I+II dual certification (IEC 61643-11), and the single module discharge capacity reaches 100kA (8/20µs).
With branches in 30 countries, it provides lightning risk assessment software DEHNrisk.
The first “dual-port isolation” technology to solve the common-mode interference of signal and power lines, and the patented SINEC technology to achieve μs-level fault location.
Phoenix Contact (Germany)
The global leader in industrial connectivity and SPD, with a 70% market share in power supply SPD and a 19% market share in the transportation sector.
With over 30,000 product lines, SPDs are integrated into its PLC system, supporting IT/TT/TNS full grid types.
The cost-effective solution covers wind power and photovoltaic scenarios, such as the FLT series for EV charging stations.
The first “PlugTec” pluggable SPD module supports remote fault alarm and thermal fuse protection, reducing operation and maintenance costs by 30%.
ECS in the United States
The world’s largest professional SPD manufacturer, the SineTamer series provides protection for the White House Medical Center and Boeing production lines.
Exclusive patented technology: ORN dynamic tracking filtering (eliminating harmonic interference) + chemical packaging process (improving heat dissipation efficiency).
Response speed <1ns, NEMA 4 housing standard, suitable for extreme environments such as oil platforms.
The only SPD company that provides “25 years of free replacement” service, with consulting marketing covering central enterprises such as Sinopec.
Bourns (USA)
A pioneer in SPD miniaturization technology, Bourns will launch the first dual-rail AC SPD (1270/1280 series) in 2024, which is IEC Class I+II certified.
The product is used in Air Force One and NASA facilities, and the 80kA discharge capacity (8/20µs) supports the 12.5kA pulse load of electric vehicle supercharging stations.
The entire series integrates TD+ thermal circuit breakers to eliminate fire risks.
The modular design reduces the board area by 40%, and the optical monitoring box displays the SPD status in real time, which is compatible with the smart building BMS system.
Citel (France)
Founded in 1937, Citel is one of the earliest companies in the world to focus on surge protection technology. In 1944, it produced the first surge protector, laying the foundation for the industry’s technical benchmark. Its annual output of gas discharge tubes (GDTs) reaches 30 million, making it one of the world’s largest GDT manufacturers.
Global layout: Headquartered in Paris, it has two major production bases in Reims, France and Shanghai, China. Its subsidiaries cover markets such as the United States, Germany, the Netherlands, and Brazil, and it serves the world through more than 50 agents.
Full-scenario product line: Covering AC/DC power supply SPD, data signal protector, coaxial transmission protector and photovoltaic dedicated lightning arrester, used in high-demand fields such as power, communications, new energy (photovoltaic/wind power), and rail transit.
GDT technical advantages: gas discharge tube technology has a fast response speed (nanosecond level), can withstand high-energy surges (such as direct lightning), and is widely used in precision equipment protection.
Customized solutions: Provide dedicated SPDs for LED lighting systems and energy storage equipment, and support complex environments such as oil platforms and data centers.
The products have passed international certifications such as UL, KEMA, and TUV, and customers include global communications giants and infrastructure projects, such as the European high-speed rail network.
Raycap (Greece)
Founded in 1987, Raycap became an important integrator in the European SPD market after acquiring the Slovenian company Iskra Zaščite in 2015, focusing on high-density industrial environments and telecommunications infrastructure protection.
Integrating Iskra’s smart meter and energy management technology, it launched the Strikesorb® series SPD and RaycapSTAX™ stackable modules to support 5G base stations and photovoltaic energy storage system integration.
R&D centers are set up in Greece, the United States, and Romania, with production capacity covering customized industrial cabinets and SPD modules.
Highly adaptable design: SPD modules are compatible with extreme temperatures (-40°C to 85°C) and corrosive environments (such as offshore platforms), and are NEMA 4X certified (dustproof/waterproof).
Focus on serving telecom operators (such as small base station concealment solutions) and renewable energy projects (such as Tesla energy storage power stations).
Weidmuller (Germany)
Founded in 1948, Weidmuller is one of the top three companies in the field of electrical connections in the world. Its VARITECTOR series SPD has become the first choice in the transportation and energy industries with its high reliability and intelligent diagnostic technology.
Leading the revision of the IEC/EN 61643-11:2012 standard, the product can support currents below 315A without backup fuses, simplifying the installation process.
With production bases in Germany and China (Shanghai), the sales network covers 17 countries, and the market share in the transportation field will reach 19% in 2023.
Varistor exhaust pipe technology: combined with multi-level coordinated protection (VPU I/II/III level), the whole system can be lightning protected without decoupling coils, reducing the failure rate by 50%.
Intelligent status management: The SPD module has a built-in optical status window (yellow/red warning) and “PUSH IN” plug-in remote signal contacts, supporting real-time monitoring.
Provided SPD system for Brüttisellen transportation hub in Switzerland (average 130,000 vehicles per day) to ensure zero interruption of control during thunderstorms.
Thor
Thor is a national high-tech enterprise focusing on the research and development and manufacturing of surge protectors (SPDs).
Relying on core patented technologies and full-scenario solutions, the company’s products cover three major areas: power supply protection, precision instrument protection, and data communication line protection, serving high-demand industries such as power grids, new energy, smart manufacturing, and rail transit.
The products are certified by NEMA 4 standards (fireproof/waterproof/explosion-proof) and provide industry-leading quality assurance commitments.
Provide consulting services based on customer scenarios, covering SPD selection, system integration, and full life cycle maintenance, helping key facilities achieve “zero lightning accidents”.
