DBA3
DBA3
Model No: DBA3

DBA3 EMI Power Filter, Inset,Bolt, 50/60Hz, 1A-20A, 250VAC, Single Phase Filter

Rated Current：1A-20A

General Purpose EMI Filter

Certificate：cUL,CQC,CE,ROHS

Can be customize according to customer requirements.

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DOREXS'DBA3 series EMI filters are compact single-phase power line filters with a rated current range of 1 A - 20 A, suitable for 115 V/250 V AC systems. They effectively suppress common-mode and differential-mode interference, feature low leakage current, and support multiple connection methods (bolt/insert/power cord). They are cUL, CE, and RoHS certified, and parameter customization is supported.
This series of power filters uses high-quality capacitors and inductors in rubber encapsulation and is widely used in industrial control systems, communication equipment, medical equipment, and home appliances.

Key Features 

  • Compact multipurpose design (space-saving) 
  • Rated current: 1 A–20 A 
  • Operating voltage: 115 / 250 VAC 
  • Two connection modes: bolt connection & 6.3×0.8 mm plug-in terminal 
  • Excellent common-mode and differential-mode interference suppression 
  • Low leakage current: < 0.5 mA (typical) 
  • Customizable parameters (terminal, material) 
  • Certifications: cUL, CE, CQC, RoHS 
  • Free sample support 

Technical Parameters

 

Specification

Details

Model：
DBA3-Bolt
Application：
Commercial/Industrial
Phase：
Single-phase
Structure：
Single-stage
Max operating voltage：
275VAC
Rated Current：
1A - 10A
Leakage Current：
≤ 0.5mA
Withstand voltage level：
2150VAC
Frequency Range：
50/60Hz
Operating Temperature：
-25°C ~ +85°C
Certifications：
UL, CQC, CE
Dimensions (mm)：
51 × 51 × 30 (W×H×D)
Weight(g)：
160
Connection Type：
Insert/Power cord/Bolt
 
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Technical Advantages

  • Utilizing high-quality Mn-Zn ferrite cores and capacitors ensures stable filtering performance and strong suppression capabilities.
  • Compact housing saves space while maintaining excellent performance.
  • Flexible connection methods (bolts/blades) adapt to different installation requirements.
  • Low leakage current enhances the safety of sensitive systems.
  • Good thermal stability and robust mechanical structure make it suitable for long-term use in harsh environments. 

Product Pictures

Detail Picture

DBA3 Detail Picture

Overall Dimension（±1mm)

DBA3 Overall Dimension（±1mm)
DBA3 - INSERT Overall Dimension
 
The cable length and interface type can be customized according to customer needs. 

Circuit Diagram

DBA3 Circuit Diagram

Insertion Loss

DBA3 EMI Filter Common-Mode and Differential-Mode Insertion Loss Curves

The DBA3 filter provides strong insertion loss (filtering capability) on both common-mode and differential-mode paths. The specific insertion loss (dB profile) will vary slightly depending on the rated current, but it has been optimized for critical EMI frequency bands.
Approvals and Compliances 
Approvals and Compliances 

Typical Applications

  • Electrical and electronic equipment
  • Consumer appliances
  • Office automation equipment
  • Data communication equipment
  • Industrial and household electronic equipment 
  • Testing and measurement instruments 
  • Medical devices and safety-sensitive systems 
  • Security monitoring and fire protection systems 
  • LED lighting, stage lighting, and automation equipment

Selection Guide

When selecting the DBA3 EMI filter, consider the following:
  1. Rated Current: Select a model from 1A to 20A based on the load.
  2. Connection Method: For mechanical rigidity, choose bolt terminals; for quick connection, use 6.3×0.8 mm blade terminals.
  3. Leakage Current: < 0.5 mA, suitable for safety-sensitive circuits.
  4. Terminal Customization: Custom terminal materials or shapes can be requested.
  5. Operating Voltage: Supports 115/250 VAC; please confirm your system voltage.
  6. Environmental Conditions: Confirm the operating temperature range (typically –25 °C ~ +85 °C).

Installation Instructions

  • Connect the DBA3 filter in series with the power supply line for maximum noise suppression.
  • Use screw terminals or blade terminals as required by your design.
  • Keep the connection length as short as possible to reduce parasitic inductance.
  • Ensure reliable grounding for safety and EMI performance.
  • Avoid routing sensitive signal lines in parallel with the filtered power supply lines. 
 

FAQ

1. Who are we?

DOREXS was founded in 2008 and is a manufacturer focusing on EMI solutions and power quality solutions with rich industry experience. Professional R&D technical team and advanced production equipment support us to provide cost-effective products and solutions.

2. How do we ensure product quality?

DBA3 single phase EMI power filters have UL, CE, ISO9001 and ROHS certifications, and each product will be subject to final inspection before leaving the factory.

3. Do we support customization?

DOREXS not only offers standard DBA3 filter products, but also supports customization of product appearance (terminals/housing) and product parameters (current/voltage). We provide cost-effective electromagnetic interference solutions and power quality solutions.

4. What services can we provide?

Delivery time: 3-7 days, negotiable for customized orders.
Delivery terms: FOB, CFR, CIF, EXW, FCA
Payment currency: USD, EUR, RMB
Payment method: T/T, L/C, MoneyGram, Western Union, Cash

5. What products can I buy from you?

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