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High Current Compact ET28 CM Choke Low Loss Stable For EMI Filters
Place of Origin:
China
Brand Name:
CHIPSEN
Certification:
UL/cUL Class B/F/H, VDE, CQC
Model Number:
ET28
Minimum Order Quantity:
1K
Price:
＄0.5-1.8/pieces
Delivery Time:
7-14 work days (Negotiable)
Payment Terms:
T/T
Supply Ability:
10000pcs
Inquiry Now
Get A Quote
Specifications
Highlight Features
High Current cm choke
,ET28 cm choke
,Low Loss common mode current choke
Isolationvoltage:
3000V AC
Powerrating:
5W - 100W
Corematerial:
Ferrite
Temperaturerange:
-40°C To +125°C
Dimensions:
Varies By Model, Typically 20mm X 20mm X 15mm
Windingtype:
Copper Wire, Enamel Coated
Regulatorycompliance:
UL, RoHS, CE
Application:
Switching Power Supplies, Chargers, LED Drivers
Productname:
High Frequency Flyback Transformer
Insulationclass:
Class B / Class F
Efficiency:
Up To 90%
Operatingfrequency:
20kHz - 200kHz
Outputvoltage:
5V - 400V DC
Inputvoltage:
85V - 265V AC
Mountingtype:
PCB Mount / Through-hole
Product Description
High Current Compact ET28 Common Mode Choke
The ET28 is a ferrite core common mode choke designed to suppress conducted common mode noise in AC input, DC input, and power conversion circuits. It uses multiple magnetically coupled windings to present high impedance to common mode interference while allowing normal differential current to pass with relatively low impedance.
Note: All values below are typical engineering inquiry references rather than guaranteed ratings. Final performance depends on magnetic material, number of windings, conductor size, turns, operating voltage, frequency spectrum, ambient temperature, and allowable temperature rise.
Industry Applications & Typical Parameters
| Industry and Application | Typical Circuit Conditions | Parameters Prioritized | Customization Support |
|---|---|---|---|
| Industrial Inverters | Single phase or three phase AC input filtering | Rated current, common mode inductance, DCR, impedance, temperature rise, insulation | Two line, three line or four line windings, current, inductance, mounting |
| Solar Inverters | PV inverter AC or DC side conducted EMI suppression | High voltage insulation, impedance frequency response, current, thermal performance | Core material, winding count, insulation, terminals, thermal design |
| Energy Storage Systems | PCS battery converter and auxiliary power filtering | RMS current, common mode impedance, DCR, temperature rise, reliability | High current conductors, reinforced insulation, customized mounting |
| EV Charging Equipment | AC input and isolated power stage EMI filter | Working voltage, creepage clearance, current, impedance, thermal cycling | Multiple line windings, insulation barriers, terminals, validation support |
| UPS Equipment | Rectifier input, inverter output and bypass line filtering | Continuous current, overload current, inductance, DCR, insulation | Current rating, wire size, winding arrangement, terminal structure |
Customization Parameters
| Parameter | Typical Inquiry Reference | Customization Status |
|---|---|---|
| Core Platform | ET28 ferrite core assembly | Customizable |
| Number of Windings | Two line, three line, four line or customer specified | Customizable |
| Common Mode Inductance | Approximately 0.2 mH to 20 mH depending on turns and current | Customizable |
| Rated Current | Approximately 1 A to 20 A depending on conductor and temperature rise | To Be Confirmed |
| Working Voltage | 125 V, 250 V, 500 V or application specified voltage | Customer Specified |
| DC Resistance | Maximum DCR specified for each winding | Customizable |
Product Characteristics
- ET28 ferrite core common mode choke construction
- Two line, three line and four line configurations available
- High common mode impedance
- Low DC resistance options
- High current winding configurations
- Matched coupled windings
- Controlled leakage inductance
- Wide frequency noise suppression capability
- Low differential mode power loss
- Reinforced insulation options
- Customized creepage and clearance
- Compact vertical or horizontal mounting
Applications
- Industrial inverter EMI filters
- Solar inverter input and output filters
- Energy storage PCS equipment
- EV charging stations
- Uninterruptible power supplies
- Variable frequency drives
- Industrial switching power supplies
- Telecom power systems
- Medical power equipment
- Data center power supplies
Why Choose Chipsen
- ET28 common mode choke customization
- Two line, three line and four line winding options
- Custom inductance, current, DCR and impedance
- Engineering support based on actual noise spectrum
- Drawing based and sample based replacement development
- High current and low resistance conductor options
- Reinforced insulation and controlled creepage design
- PCB pin, lead wire and terminal customization
- Vertical, horizontal and customized mounting
- MOQ from 100 pieces for eligible projects
- Five year warranty with extended warranty evaluation
Frequently Asked Questions
What is the main function of the ET28 common mode choke?
It suppresses common mode noise travelling in the same direction on multiple power lines while allowing normal differential current to pass with relatively low impedance.
Can the ET28 be used in a three phase circuit?
Yes. A three winding or four winding configuration can be developed for three phase systems with or without a neutral conductor. Voltage, current, insulation and wiring configuration must be provided.
What information is required for customization?
Please provide the number of lines, working voltage, continuous and peak current, common mode inductance test frequency, target impedance frequencies, maximum DCR, leakage requirement, temperature conditions, dimensions, terminal arrangement and applicable standards.
Does this choke guarantee EMC compliance?
No. EMC performance depends on the complete filter circuit, PCB layout, grounding, cables, enclosure and operating conditions. The choke must be validated in the customer equipment.
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