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Capital EMI Filter

Precision EMI/EMC Filtering Solutions for Signal Integrity & Compliance

In an era of increasing electromagnetic interference, CAPITAL’s EMI filters serve as the first line of defense for sensitive electronic equipment. Designed to suppress conducted emissions and enhance immunity, our filters ensure your products meet stringent international standards (CE, UL, VDE). We specialize in custom-tailored filtering solutions that balance size, cost, and performance, protecting your devices from grid noise and preventing your equipment from polluting the power network.


Power Quality & Interference Suppression Guide

Our filter catalog covers single-phase to complex three-phase systems, addressing specific noise frequencies and current requirements.


▲ Single Phase & DC Filters

· Single Phase Filters: Compact designs for medical devices, office equipment, and home appliances. Available in standard and high-performance variants to handle switching power supply noise.

· DC Filters: Specifically designed for DC input lines to prevent noise from entering or leaving DC-DC converters, crucial for telecommunications and renewable energy systems.


▲ Industrial Three-Phase & Servo Solutions

· 3 Phase & 3 Phase + N Line Filters: Heavy-duty filters for industrial motors, inverters, and CNC machinery. They effectively reduce leakage current and protect sensitive control logic from power grid fluctuations.

· Frequency Conversion & Servo-Specific Filters: Optimized for variable frequency drives (VFDs) and servo systems. These filters target the specific harmonic frequencies generated by high-speed switching, preventing motor overheating and control errors.

· Reactors (Input/Output): Used in conjunction with filters to smooth current waveforms, reduce harmonics, and protect drive components from voltage spikes.


Manufacturing Excellence
 
Backed by a modern 12,000 sqm factory and advanced automated production lines, we boast a massive monthly capacity of 1.5 million units. Our dedicated team of nearly 200 employees—including expert electronic and structural engineers—ensures precision and efficiency in every order.
 
 
Global Reach & Market Presence
 
We are a premier manufacturer integrating R&D, production, and sales. Our high-performance cooling fans are not only dominant domestically but are alsowidely exported to Europe, the USA, and Southeast Asia, earning a solid reputation for reliability worldwide.
 
 
Comprehensive Product Portfolio
 
Specializing in DC, AC, and EC cooling fans, our range covers:
Axial Fans & Blowers
Cross-flow & Tangential Fans
Backward Centrifugal Fans
Custom Active Cooling Solutions
Widely applied in Telecommunications, New Energy, Automotive Electronics, and Industrial Control.
Certified Quality
 
Quality is our cornerstone. We are fully certified under UL (E507533), TUV, CE, and ISO9001:2015, ensuring our products meet the strictest international safety and performance standards.
 
 
 
 
Capital Technology Company Limited
+86-0755-27087416 / 13509669498
 8613509669498
+86-0755-23076120
1516156057 / 403432958
102,Building A,Qianwan Zhichuang, Gushu Xiaweiyuan, Xixiang Street, Baoan District, Shenzhen.
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