Model No: DOREXS 20A three phase EMI filter
Three Phase EMI Filter 20A for Industrial Equipment & EMC Compliance
Industrial Three Phase EMI Filter 20A Manufacturer | OEM & Custom EMC Solutions
✔ Rated Current: 20A
✔ Rated Voltage: 380VAC / 440VAC / Custom Available
✔ Frequency: 50/60Hz
✔ Three Phase Power Line EMI Filter
✔ Excellent Common Mode & Differential Mode Attenuation
✔ CE & RoHS Compliant
✔ OEM / ODM Customization
✔ Fast Engineering Support
✔ Rated Current: 20A
✔ Rated Voltage: 380VAC / 440VAC / Custom Available
✔ Frequency: 50/60Hz
✔ Three Phase Power Line EMI Filter
✔ Excellent Common Mode & Differential Mode Attenuation
✔ CE & RoHS Compliant
✔ OEM / ODM Customization
✔ Fast Engineering Support
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Superior EMI Suppression for Industrial Three-Phase Power Systems
The DOREXS 20A Three Phase EMI Filter delivers clean, interference-free power to your industrial equipment by eliminating conducted electromagnetic interference across a broad frequency range. A 20-amp rating means each phase can carry up to 20 amperes of continuous current, making this power line filter the ideal solution for motor drives, automation systems, and converters that demand stable, noise-free three phase power. With full electromagnetic compatibility compliance built in, your equipment operates reliably - and passes regulatory testing the first time.
Why Choose the DOREXS Three Phase EMI Filter 20A?
| ✔ High EMI Suppression Performance | ✔ Wide Application Compatibility | ✔ Easy Installation |
| Filters provide high broadband attenuation from 10 kHz to 30 MHz, eliminating unwanted noise that can disrupt sensitive electronics and interfere with control signals across your facility. | Suitable for various industrial systems including VFDs, servo drives, UPS systems, industrial automation equipment, robotics, CNC machinery, renewable energy systems, and EV charging infrastructure. | Threaded stud connections and clearly marked terminals make installation straightforward, reducing setup time and risk of wiring errors on the factory floor. |
| ✔ Compact, Space-Saving Design | ✔ Low Leakage Current | ✔ Robust Industrial Construction |
| The filter's design keeps overall dimensions minimal, saving valuable cabinet space in crowded industrial installations where every millimeter counts. | Three-phase filters are designed for minimal leakage current, ensuring safe operation alongside RCD and GFCI protection devices without nuisance tripping. Proper sizing of EMI filters can reduce undesirable effects such as nuisance tripping. | Built for harsh environments with an operating temperature range of -25°C to +85°C, this line filter withstands vibration, heat, and humidity for long-term reliability in demanding industrial applications. |
| ✔ OEM & Custom Design Available | ||
| Voltage, current, leakage current, terminal configuration, mounting method, and attenuation characteristics can all be customized according to customer requirements. |
Technical Specifications
Parameter | Specification |
| Product Type： | 3 phase EMI filter(two-stage/Multi-stage) |
| Rated Current： | 20 Amperes continuous per phase |
| Rated Voltage： | 250V AC (phase-to-neutral) / 440V AC (phase-to-phase)； EMI filters support voltages up to 1000 VAC in extended-range configurations |
| Frequency: | 50/60 Hz |
| EMI Suppression Range: | Exceptional attenuation from 150 kHz to 30 MHz; enhanced performance down to 10 kHz with multi-stage options |
| Leakage Current : | Ultra-low design for RCD compatibility |
| Hi-Pot / Insulation: | ~1,450 VDC line-to-line, ~2,250 VDC line-to-ground |
| Insulation Resistance: | ≥100MΩ |
| Operating Temperature: | -25°C to +85°C |
| Housing Material： | Nickel-plated iron casing |
| Mounting: | Chassis mount with threaded studs |
| Certifications: | CE, RoHS compliant |
Series Availability: Three-phase filters are rated from 20 A to 2500 A across different types in the DOREXS product range
Product Pictures
Detail Picture
 |  |  |
DAC1-20A | DAC3-D-20A | DAC41-20A |
Overall Dimension（±1mm)
 |  |  |
| DAC1 | DAC3-D | DAC41 |
Circuit Diagram
 |  | |
Two-stage | Multi-stage |
Ideal Applications
The DOREXS Three Phase EMI Filter 20A is widely used in industrial and commercial applications where conducted electromagnetic interference must be reduced to meet EMC requirements.
Industrial Automation
Ideal for PLC control cabinets, factory automation equipment, industrial robots, and assembly lines.
CNC Machines
Industrial CNC systems integrate servo motors, switching power supplies, PLCs, and communication networks. The filter improves equipment stability and reduces electromagnetic interference.
Variable Frequency Drives (VFD)
High-frequency PWM switching in VFDs produces substantial conducted noise. Installing a 20A three phase EMI filter helps reduce interference entering the power network and improves EMC compliance.
Servo Drive Systems
Servo motors require stable communication and encoder feedback. EMI suppression minimizes electrical noise that may affect positioning accuracy and communication reliability.
UPS Systems
Provides conducted EMI suppression for uninterrupted power supply systems.
EV Charging Stations
Suitable for AC charging systems and power conversion equipment requiring EMC compliance.
Renewable Energy Systems
Compatible with solar inverters, wind power converters, battery energy storage systems, and smart grid applications.
Medical Equipment
Low-noise filtering solution suitable for industrial medical devices requiring stable EMC performance.
EMI filters are used in applications such as industrial automation and renewable energy systems. Three-phase filters are essential for reliable industrial machinery operation, and they significantly reduce the risk of malfunctions caused by interference. If clean, stable three phase power is critical to your product's performance, this filter fits your needs.
Insertion Loss Performance
The DOREXS three phase EMI filter 20A is engineered to provide stable insertion loss performance against both:
- Common Mode Noise Reduction-Helps suppress interference transmitted between line conductors and ground.
- Differential Mode Noise Reduction-Reduces noise generated directly across power conductors.
What Makes It Different
Most three phase filters on the market force a compromise: you either get high performance attenuation in a bulky enclosure, or a compact form factor that sacrifices noise suppression at critical frequencies.
DOREXS 20A Three Phase EMI Filter is engineered differently:
Advanced Multi-Stage Filtering – While single-stage alternatives lose effectiveness below 150 kHz, our multi-stage topology delivers superior attenuation across the entire 10 kHz to 30 MHz range. These filters consist of inductors and capacitors configured to reduce conducted noise at both common-mode and differential-mode levels.
Optimized for 20A Applications – X-capacitors suppress differential-mode noise between phases in EMI filters, while Y-capacitors connect the phases to ground to divert common-mode noise safely. Common-mode chokes block high-frequency noise traveling along all phases to ground. Every component is precisely sized so inductors won't saturate under high currents and capacitors maintain resonance characteristics exactly where they're needed.
Internationally Certified – Filters are compliant with IEC, UL, and cUL safety standards, plus CE and RoHS - giving you the certifications required for global markets without additional testing cycles.
Mechanical Design
This 3 phase filter supports compact panel integration for industrial systems.
Installation recommendations:
- Install close to power entry points
- Minimize cable loop area
- Separate input and output wiring
- Ensure proper grounding connection
- Avoid parallel routing of noisy cables
Correct installation significantly improves EMC suppression performance.
Certifications & Compliance
DOREXS three phase EMI filter 20a is manufactured under rigorous quality control processes to meet international EMC standards.
Compliance support provided includes:
- CE compliance
- RoHS compliance
- EMC testing support
- ISO 9001 certification
- Industrial quality management
- OEM documentation support
Custom EMI Filter Solutions
As a professional three phase EMI filter manufacturer, DOREXS provides OEM and ODM EMI filter solutions tailored to specific EMC requirements.
Customization options include:
- Current Rating Adjustment
- Low Leakage Current Design
- Terminal Configuration
- Mounting Structure
- Enhanced Attenuation Performance
- Medical Grade Design
- High Reliability Industrial Design
Our engineering team can assist with EMC troubleshooting, filter selection, and custom filter development for demanding industrial applications.
Why Choose DOREXS?
Professional three phase EMI Filter Manufacturer
Over a decade of experience in EMI and EMC suppression technologies.
Comprehensive Product Range
- Single Phase EMI Filters
- Three Phase EMI Filters
- Medical EMI Filters
- DC EMI Filters
- IEC EMI Filters
- Custom EMI Filters
Custom Design Support
OEM and ODM projects supported according to customer specifications.
Quality Assurance
Manufactured under strict quality management processes with international compliance standards.
Global Customer Support
Technical assistance available for equipment manufacturers, system integrators, and industrial OEM customers worldwide.
Ready to Protect Your Equipment?
Stop dealing with electromagnetic interference disrupting your three-phase systems. Three-phase filters provide effective noise suppression in high-power applications, and DOREXS delivers cost effective products backed by engineering expertise and international certifications.
Choose the DOREXS 20A Three Phase EMI Filter for reliable, high performance EMI suppression that keeps your industrial machinery running without interruption.
Choose the DOREXS 20A Three Phase EMI Filter for reliable, high performance EMI suppression that keeps your industrial machinery running without interruption.
Contact us today for technical consultation, custom solutions, and fast delivery. Our engineering team is ready to help you find the right solution for your application.
FAQ
What is a Three Phase EMI Filter?
A three phase EMI filter is a passive electrical filter installed on three-phase power lines to suppress conducted electromagnetic interference generated by industrial electrical equipment.
When should I use a 20A Three Phase EMI Filter?
A 20A model is suitable when the maximum operating current of the equipment is approximately 20 amperes. Always select a filter with appropriate current and voltage ratings for your system.
Can this filter help pass EMC testing?
Yes. Properly selected and installed EMI filters significantly reduce conducted emissions and improve the likelihood of meeting EMC standards. Final compliance also depends on grounding, shielding, cable routing, and overall system design.
Do you provide custom EMI filters?
Yes. As a dedicated EMI filter manufacturer, DOREXS provides customized solutions for unique requirements - whether you need different types of attenuation profiles, modified leakage current levels, or non-standard mounting configurations. Every customer receives dedicated engineering support.
What industries commonly use Three Phase EMI Filters?
They are widely used in industrial automation, VFDs, servo drives, robotics, renewable energy systems, UPS equipment, EV charging infrastructure, CNC machinery, medical equipment, and power distribution systems.
Is it compatible with RCD protection devices?
Yes. The ultra-low leakage current design ensures full RCD compatibility. Three-phase EMI filters help maintain compliance with federal EMI regulations while keeping leakage well below thresholds that could cause nuisance tripping of protective devices.
What EMC standards does it meet?
These filters support EMC compliance for various standards including CE and FCC. EMI filters are crucial for meeting international electromagnetic compatibility regulations, including EN 55011, EN 61000-6-3/6-4, and IEC 60939-3. Full details are available on our certifications page.
Can it handle motor drive applications?
Absolutely. This emi filter is specifically designed for variable frequency drives and motor control systems. High-performance filters reduce risk of malfunctions in industrial applications where PWM switching creates significant conducted noise. For VFD-specific solutions, explore our DF2 series for VFD applications.
What about 3-wire vs. 4-wire configurations?
This product uses a 3-phase 3-wire (delta) configuration plus ground. If your system requires a neutral line connection, contact us about our 4-wire options.
What's included in the package?
ilter unit, mounting hardware, and installation instructions - everything you need for easy installation.
Comprehensive score