Model No: DBA7-40A
PLC EMI Filter | DBA7-40A High-Performance Single-Phase Filter
Rated Voltage：110VAC-250VAC
Rated Current：40A
Certificate：cUL,CQC,CE,ROHS
Can be customize according to customer requirements.
Support free samples
Rated Current：40A
Certificate：cUL,CQC,CE,ROHS
Can be customize according to customer requirements.
Support free samples
Quantity :
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The DBA7-40A is a high-performance single-phase PLC EMI filter designed for PLC (Programmable Logic Controller) systems,electrical automation equipment, industrial robots, medical instruments, and laser processing equipment.
It features strong common-mode/differential-mode rejection, small size, and high reliability, effectively reducing conducted interference on power lines, improving equipment operational stability, and ensuring stable communication, accurate response, and long-term reliability of the PLC control system.
It is suitable for applications requiring higher interference immunity and operation in strong electromagnetic environments.
It features strong common-mode/differential-mode rejection, small size, and high reliability, effectively reducing conducted interference on power lines, improving equipment operational stability, and ensuring stable communication, accurate response, and long-term reliability of the PLC control system.
It is suitable for applications requiring higher interference immunity and operation in strong electromagnetic environments.
Key Features
- 40A Rated Current, Suitable for High-Power Industrial Systems
Meets industrial-grade power requirements, providing stable power to PLC mainframes, motor control systems, servo drives, etc.
- Compact Design, Easy Installation
Compact structure suitable for multi-brand PLC cabinets and control boxes, flexibly adaptable to various industrial scenarios.
- High-Performance Bipolar Filtering Structure
Bipolar filtering design enhances common-mode and differential-mode noise attenuation, making PLC communication more stable.
- Strong Anti-Interference Performance (EMI/EMC)
Effectively suppresses power supply noise in the 150kHz–30MHz range, reducing equipment malfunctions and control anomalies.
- Designed Specifically for Industrial and Medical Applications
High voltage resistance and superior insulation performance, suitable for equipment with stringent EMC requirements.
- OEM/ODM Customization Supported
Terminals, housing materials, performance curves, and structural designs can be customized according to customer requirements; rapid prototyping is supported.
Technical Parameters
Specification | Details |
Model： | DBA7-40A |
Application： | PLC control system |
Phase： | Single-phase |
Structure： | Dual-stage |
Hipot Test Voltage: | 1000VDC (L-L) 1700VAC (L-G) |
Rated Current： | 40A |
Insulation Resistance： | >50MΩ @ 500VDC |
Frequency Range： | 50/60Hz |
Operating Temperature： | -25°C ~ +85°C |
Certifications： | UL, CQC, CE |
Dimensions (mm)： | 73 × 104 × 77 (W×H×D) |
Weight(g)： | 100 |
Connection Type： | Insert/Bolt |
Product Pictures
Detail Picture
Overall Dimension（±1mm)
- Compact design, suitable for PLC control cabinets
- Supports wall-mounted/panel mounting
Insertion loss -(common mode)
The DBA7-40A exhibits excellent noise suppression performance across the 150kHz–30MHz EMI frequency band, particularly in:
- Common Mode interference
- Differential Mode interference
both exhibit good attenuation, significantly improving PLC communication quality and control accuracy.
Approvals and Compliances
Typical Applications
The DBA7-40A PLC filter is widely used in scenarios requiring stable control and strong EMC performance:
- Industrial automation facilities managing PLC-based control systems with heavy electromagnetic interference from production equipment
- Smart grid operators maintaining reliable communication across power distribution networks spanning multiple geographical areas
- Building automation specialists installing smart meter infrastructure that must function despite electrical noise from HVAC and lighting systems
- Solar installation professionals working with microinverter communication systems requiring clean power line signals for monitoring and control
- Manufacturing plants located in high EMI environments where motor drives and welding equipment continuously affect signal quality
Technical Advantages
- Improved signal quality and reduced communication errors Eliminate data corruption and transmission failures that affect smart meters, building automation, and industrial control systems operating on the same power lines.
- Protection against high frequency EMI from industrial sources Shield your line communication from interference generated by variable frequency drives, welding equipment, and other heavy machinery affecting signal integrity.
- Enhanced performance across multiple PLC standards Ensure compatibility with CENELEC, FCC, ARIB, and IEEE1901.2 protocols while maintaining clean signal transmission for all connected devices.
- Network separation capabilities on single phase systems Prevent interference between multiple PLC networks installed on the same AC phase, allowing continuous operation without signal degradation.
- Extended equipment lifespan through noise reduction Reduce electrical stress on power line communication equipment by filtering harmful transients and voltage spikes that can cause premature component failure.
Why do PLC systems need EMI filters?
PLC devices commonly face the following problems:
- Power supply noise causing PLC communication errors
- Abnormal I/O module resets
- Severe interference in industrial control environments causing signal drift
- High-power equipment such as lasers and motors causing PLC malfunctions
The EMI filtering structure of the DBA7-40A can significantly solve:
- Reduce conducted interference
- Improve communication stability
- Prevent PLC malfunctions
- Extend equipment lifespan
Selection Guide
| Model Number | Rated Current | Performance Class | Housing | Terminal Type |
|---|---|---|---|---|
| DBA7-40A | 40A | High Performance | Nickel-plated Iron Housing | Customizable (Bolts/Cables/Inserts) |
The optimal model can be matched based on system current, installation method, and interference level.
For assistance with model selection, I can provide the best solution based on your application parameters.
For assistance with model selection, I can provide the best solution based on your application parameters.
Types of PLC Filters and Selection Criteria
- Narrow-band PLC filters target specific frequency ranges used by your power line communication equipment. These filters are designed to provide maximum insertion loss at problematic frequencies while maintaining low impedance for power transmission.
- Single phase and three-phase configurations accommodate different installation requirements. Single phase filters work well for residential and light commercial applications, while three-phase options handle industrial environments with higher power requirements.
- DIN rail mounted filters integrate easily into industrial control panels where space is limited and installation must be fast. These products include mounting hardware and connection terminals designed for standard electrical enclosures.
- PCB-mounted filter options allow equipment manufacturers to integrate filtering directly into their designs, providing built-in protection that doesn’t require additional installation steps.
Why Choose DOREXS ?
- Over 15 years of EMI filter manufacturing experience
- Fast global delivery and stable supply chain
- Engineering support for installation and customization
- Competitive pricing compared with leading brands
- Flexible MOQ, suitable for small and large projects
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?
Our filter products 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?
Absolutely. DOREXS offers customization options for product appearance, electrical parameters, and connection methods to meet your unique application needs.
4. 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
5. What products can I buy from you?
EMI/EMC filters, transformers, reactors, insulated wires and power sockets, etc.
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