DF1 3 phase VFD filter
Model No: DF1

DF1 Three Phase EMI Filter | 6A-20A | Three-Stage Filter (Suitable for 1.5–3.0 KVA Frequency Inverters)

Three Phase EMI Filter

Rated Current：6A-20A

Three Phase Three Stage Filter

Low Leakage Current

Certificate：CE,ROHS

Can be customize according to customer requirements.

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The DOREXS DF1 three-phase EMI filter is suitable for 6A–20A industrial equipment and 1.5–3.0 kVA frequency converters/servo drives. Employing a three-stage filtering structure, it offers superior common-mode and differential-mode interference suppression, providing stable and reliable insertion loss across a wide frequency range.
Compared to its counterpart (DF2), the DF1 boasts a more compact size, making it ideal for space-constrained applications.

Key Features

  • Three-stage filtering structure enhances low-frequency EMC suppression capability.
  • Rated current: 6A / 10A / 15A / 20A
  • Operating voltage: Three-phase 380/440 VAC
  • High common-mode/differential-mode insertion loss, stable filtering performance
  • More compact than the DF2 series, suitable for space-constrained applications
  • Optimized design for frequency converters and servo systems
  • Excellent insulation performance and thermal stability
  • Customizable terminals, wire lengths, mounting methods, and housing structures
  • CE and RoHS certified (UL optional)

Technical Specifications

 

Specification

Details

Model：
DF1
Application：
VFD / Motor drives / Industrial equipment
Phase：
Three-phase
Structure：
Three-stage
Max operating voltage：
250/480VAC
Rated Current：
6A 10A 15A 20A
Adaptable frequency converter power
1.5–3.0 kVA
Leakage Current：
≤ 3mA(Customizable low-leakage version)
Withstand voltage level：
2250VAC
Frequency Range：
50/60Hz
Operating Temperature：
-25°C ~ +85°C
Certifications：
CQC, CE
Dimensions (mm)：
190 × 130 × 60 (W×H×D)
Weight(g)：
800
Connection Type：
Block / Wire / Custom
 
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Technical Advantages

  • Three-stage filtering structure, particularly effective against low-frequency interference.
  • Low leakage current, meeting industrial safety requirements.
  • Optimized core design, less prone to saturation even under high current.
  • Maintains good insertion loss even under full load.
  • Smaller size and flexible installation, suitable for environments with limited rack space

Product Pictures

Detail Picture

DF1 Detail Picture

Overall Dimension（±1mm)

 
 
DF1 Overall Dimension（±1mm)

 

Circuit Diagram

DF 1 Circuit Diagram

Insertion Loss 

Insertion loss curve of DF1 three-phase EMI filter (common mode + differential mode)
The DF1 exhibits excellent performance in both common-mode and differential-mode insertion loss. Its three-stage filtering structure offers significant advantages in the low-frequency range (especially in the inverter switching noise band), ensuring stable EMC performance of the equipment.
 

Customization Options 

Cable length and interface type can be customized according to customer needs. DOREXS can also customize EMI filter parameters and appearance dimensions according to customer equipment requirements. At DOREXS, everything is based on customer requirements and we are committed to creating exclusive EMI solutions for customers. 

Approvals and Compliances 

Approvals and Compliances 

Applications

  • Three-phase frequency converters (1.5–3.0 kVA)
  • Servo motors and frequency converters
  • CNC (Computer Numerical Control) equipment / Automation equipment
  • Industrial water pumps, air compressors
  • Industrial power systems
  • Packaging, textile, and processing equipment
 

Selection Guide

  1. Rated Current: Selectable based on inverter output: 6A/10A/16A/20A
  2. Equipment Power: Compatible with 1.5–3.0 kVA inverters
  3. Filtering Stages: Three-stage structure suitable for harsh electromagnetic environments
  4. Size Requirements: DF1 is more compact, suitable for equipment with limited installation space
  5. Connection Methods: Terminal / Cable type / Customizable
  6. Ambient Temperature: –25 °C to +85 °C

Installation Guidelines

  1. Install the filter as close as possible to the inverter input.
  2. Keep connection cables as short as possible to reduce parasitic inductance.
  3. Ensure a reliable PE ground connection.
  4. Avoid routing cables parallel to signal lines.
  5. It is recommended to place DF1 at the front end of the inverter's rectification stage.

FAQ

1. Is DF1 suitable for frequency converters?

Yes, especially suitable for 1.5–3.0 kVA VFD/Servo drives.

2. Does it support three-stage filtering?

Yes, DF1 has a standard 3-Stage three-stage filtering structure.

3. Do we support customization?

DOREXS not only provides standard products, but also supports product appearance customization and product parameter customization. We provide cost-effective EMI solutions and power quality solutions.

4. What is the difference between DF1 and DF2?

DF1 is more compact, rated current 6–20A, and has a stronger three-stage filtering structure.

5. What services can we provide?

Delivery terms: FOB, CFR, CIF, EXW, FCA
Payment currency: USD, EUR, RMB
Payment method: T/T, L/C, MoneyGram, Western Union, Cash

6. What products can I buy from you?

EMI/EMC filters, transformers, reactors, insulated wires and power sockets, etc.