Model No: DOREXS 20 A single phase EMI filter
20A Single Phase EMI Filter for Industrial EMC & Conducted Noise Suppression
Suitable for industrial automation systems, medical devices, VFD applications, and OEM equipment manufacturing, this single phase power line filter supports custom electrical specifications and application-specific EMC optimization.
✔ Rated Current: 20A
✔ Single Phase AC Input
✔ High Attenuation Performance
✔ Conducted EMI Suppression
✔ Compact Metal Housing
✔ OEM / ODM Customization
✔ Industrial Grade Reliability
✔ Global EMC Compliance Support
✔ Rated Current: 20A
✔ Single Phase AC Input
✔ High Attenuation Performance
✔ Conducted EMI Suppression
✔ Compact Metal Housing
✔ OEM / ODM Customization
✔ Industrial Grade Reliability
✔ Global EMC Compliance Support
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Superior EMI Suppression for Industrial and Commercial Applications
DOREXS 20A single phase EMI filters are designed to reduce conducted electromagnetic interference on 20A power lines, protect sensitive electronic equipment, and help your system meet EMC compliance requirements.
Installed on the incoming line before the load, this emi filter suppresses electromagnetic interference EMI and radio frequency interference before noise reaches your power supply, control electronics, medical devices, office equipment, consumer electronics, or other electronic equipment. Power line filters suppress electromagnetic interference (EMI), and a properly selected 20A EMI filter can effectively reduce conducted interference that may interfere with stable operation.
For industrial equipment, medical equipment, automation equipment, electrical equipment, and other equipment that must run in noisy environments, DOREXS provides high performance power line protection with strong noise suppression, low leakage current options, and configurations built to ensure compliance with electromagnetic compatibility regulations, including international standards like EN55011.
Installed on the incoming line before the load, this emi filter suppresses electromagnetic interference EMI and radio frequency interference before noise reaches your power supply, control electronics, medical devices, office equipment, consumer electronics, or other electronic equipment. Power line filters suppress electromagnetic interference (EMI), and a properly selected 20A EMI filter can effectively reduce conducted interference that may interfere with stable operation.
For industrial equipment, medical equipment, automation equipment, electrical equipment, and other equipment that must run in noisy environments, DOREXS provides high performance power line protection with strong noise suppression, low leakage current options, and configurations built to ensure compliance with electromagnetic compatibility regulations, including international standards like EN55011.
Key Features
| ✔ Exceptional noise suppression | ✔ Protects expensive equipment | ✔ Easy installation |
| High-quality EMI filters provide at least 40 dB of attenuation, and DOREXS designs can deliver up to 60 dB effective attenuation when matched to the correct interference frequencies. | Power line protection reduces the risk of equipment damage, and single phase EMI filters reduce the risk of equipment damage from interference in sensitive electronic systems. | Single-phase filters are compact and easy to install, occupy limited space, are lightweight, and are available for chassis mount, DIN rail, or custom PCB mount connection. |
| ✔ Reliable long-term operation | ✔ Cost-effective compliance support | |
| Power line protection ensures reliable operation of electrical systems, while single-phase filters improve equipment stability, longevity, and reliability in industrial equipment and medical devices. | EMI filters are crucial for compliance with EMC regulations, and EMC compliance improves overall system performance in electrical applications. |
DOREXS filters are built for various applications where electromagnetic noise can be generated by Variable Frequency Drives, switching power supplies, machine tools, LED drivers, and other high frequency noise sources. By reducing electromagnetic interference in power lines, the filter helps protect sensitive electronic components from noisy environments and supports the proper functioning of electronic products over a 10+ year service life target when installed and derated correctly.
Technical Specifications
Parameter | Specification |
| Product Type： | 20A single phase emi filter / emc filter for power line protection |
| Rated Current： | 20A continuous operation |
| Rated Voltage： | 115/250V AC, 50/60Hz |
| Rated Voltage Support： | 20-amp EMI filters can handle standard operating voltages like 120V or 250V |
| Filter Architecture： | Single stage as standard; multi-stage designs available for higher attenuation needs |
| Attenuation Performance： | High-quality EMI filters provide at least 40 dB of attenuation; DOREXS application-matched versions can provide up to 60 dB noise suppression across selected conducted EMI bands |
| Noise Types Controlled: | Common mode noise, differential mode noise, electromagnetic interference, radio frequency interference, rf interference, and high frequency noise |
| Leakage Current Options： | Standard Y-capacitor, low leakage current, or no-Y-capacitor versions; leakage current generated by Y-capacitors must meet safety limits |
| Operating Temperature: | -25°C to +85°C; temperature derating is necessary for EMI filters operating in high temperatures |
| Housing Material： | Nickel-plated iron casing |
| Mounting Options： | Chassis mount, DIN rail, or PCB mount types available |
| Terminals / Connection： | Quick-connect, screw terminal, or customized connection options |
| Housing: | Shielded metal housing with compact structure for industrial and commercial electrical systems |
| Physical Fit: | EMI filters must have physical specifications that fit the equipment, so DOREXS supports custom dimensions, terminal orientation, and enclosure requirements |
| Compliance: | UL, CE, and RoHS compliant configurations; designs available to support IEC safety expectations and electromagnetic compatibility regulations |
Filters are rated for specific current and voltage ranges, and EMI filters are rated for specific current and voltage ranges to ensure safe, stable operation under the expected load. For additional information about frequency response, leakage status, temperature derating, or custom drawings, DOREXS can provide application-specific technical data.
Product Pictures
Detail Picture
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Insert | Screw Terminal | DIN Rail |
Overall Dimension（±1mm)
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| Insert | Screw Terminal | DIN Rail |
Circuit Diagram
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Single stage | Multi-stage |
Ideal Applications
Industrial automation equipment and control panels
EMI filters mitigate electromagnetic noise generated by Variable Frequency Drives, contactors, relays, switch-mode power supplies, and industrial machine controllers.
Medical device power supplies
Single phase filters enhance reliability in industrial equipment and medical devices, while low leakage current designs help address critical leakage current limits for medical equipment EMI filters.
Variable frequency drives and motor control systems
A 20A single phase emi filter helps reduce conducted interference generated by fast switching power electronics and protects downstream control electronics.
LED lighting systems and electronic ballasts
Effective attenuation reduces high frequency noise that may cause flicker, unstable output, or interference with other electronic products.
Laboratory and test equipment
Clean power supports measurement accuracy, equipment stability, and proper functioning in precision environments.
Computer systems and telecommunications equipment
EMI filters are used in computer systems and telecommunications equipment where electromagnetic compatibility and signal reliability are essential.
Consumer electronics, office equipment, and appliances
Single-phase filters provide strong protection for electronic equipment while remaining compact and easy to install.
If you need to protect a single phase power line, reduce electromagnetic interference, improve reliability, and ensure compliance, DOREXS can help select or customize the right 20A emi filter for your electrical application.
Insertion Loss Performance
The DOREXS 20A single phase EMI filter 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.
Insertion loss performance depends on:
- System impedance
- Cable routing
- Installation method
- Grounding quality
- Load characteristics
Custom attenuation curves are available upon request.
Mechanical Design
This 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 EMI filters are manufactured under rigorous quality control processes to meet international EMC standards.
Compliance support provided includes:
- UL compliance
- CE compliance
- RoHS compliance
- EMC testing support
- ISO 9001 certification
- Industrial quality management
- OEM documentation support
Custom EMI Filter Solutions
OEM & Custom 20A EMI Filter Manufacturing
DOREXS supports custom EMI filter development based on application requirements.
Customization options include:
- Electrical Customization
- Different current ratings
- Leakage current adjustment
- Enhanced attenuation performance
- Mechanical Customization
- Housing dimensions
- Mounting methods
- Terminal structures
- Industry-Specific Solutions
- Medical applications
- Industrial automation
- Power electronics
- Communication equipment
Our engineering team supports custom EMC optimization projects from prototype through volume production.
Ready for Superior EMI Protection?
Stop letting electromagnetic interference, radio frequency interference, and unstable power line noise put your equipment at risk. Choose DOREXS 20A Single Phase EMI Filters for professional power line protection, reliable operation, strong attenuation, and compliance-ready design.
With DOREXS, you get:
With DOREXS, you get:
- 20A single phase filtering for industrial, commercial, medical, and electronic systems
- Noise suppression up to 60 dB when properly matched to the interference profile
- Standard, low leakage current, and custom Y-capacitor configurations
- Chassis mount, DIN rail, and PCB mount options
- UL, CE, RoHS compliant configurations with IEC-focused design support
- Engineering help for various applications, including industrial equipment, medical devices, machine tools, telecommunications, and other equipment
Contact the DOREXS engineering team for a technical consultation, custom filter design, or additional information about selecting the right 20A single phase emi filter for your system.
FAQ
Where should the filter be installed?
The filter should be installed at the power entry point, before sensitive electrical equipment or electronic systems. Keep the input and output wiring separated, connect ground correctly, and mount the filter securely to maintain performance and safety.
Can this filter be used for medical equipment?
Yes, DOREXS can support medical equipment applications with low leakage current configurations. Leakage current limits are critical for medical equipment EMI filters, so the correct Y-capacitor strategy, insulation design, rated voltage, and safety standard requirements must be reviewed before final selection.
Can DOREXS modify the mounting or terminals?
Yes. EMI filters can be chassis mount, DIN rail, or PCB mount types, and DOREXS can customize terminals, case dimensions, compact structure layouts, and connection formats so the physical specifications fit the equipment.
Will this filter help with Variable Frequency Drive noise?
Yes. Filters mitigate electromagnetic noise generated by Variable Frequency Drives, especially conducted emi and rfi that travel through the power line and interfere with industrial equipment, automation equipment, control circuits, and other electronic equipment.
What standards should I consider?
EMI filters are commonly used to meet electromagnetic compatibility regulations. Depending on the device and market, you may need EMC regulations, UL or IEC safety standards, EN55011, CE, RoHS, or other regional requirements. DOREXS can help review compliance targets.
What about high temperature operation?
Temperature derating is necessary for EMI filters operating in high temperatures. DOREXS evaluates load current, enclosure temperature, airflow, and mounting surface conditions to reduce thermal risk and maintain long-term reliability.
Do you offer technical support and warranty coverage?
Yes. DOREXS provides technical consultation, custom filter design support, application review, testing guidance, and warranty support based on the final product configuration and project requirements.
Comprehensive score