Description
100% Copper Toroidal Inductor – 0903 Iron Powder Ring Power Choke
Furthermore, our 100% Copper Toroidal Inductor is a high-performance soft magnetic power electronic component built around a closed circular toroidal magnetic core. It is wound with full pure copper wire on iron powder or MnZn ferrite ring cores, widely categorized as a ring-type choke coil for high-frequency circuits and SMPS transformers.
In addition, this toroidal coil adopts longitudinal field winding structure to deliver outstanding electromagnetic performance compared with ordinary rod inductors. Soft magnetic toroidal inductors feature a higher Q factor and larger stable inductance value under the same coil volume. This advantage comes from its fully closed magnetic circuit design: fewer winding turns are required to reach target inductance.
Magnetic flux is fully confined inside the high-permeability ring core, cutting stray flux loss and reducing electromagnetic interference to surrounding PCB components. Geometrically, the magnetic flux runs parallel to the central axis of the toroidal core, forming uniform magnetic distribution with minimal flux leakage. If you need matching power magnetic components, you can view our EE55 transformer series for high-power switching power supply matching solutions.
Datameter Of 100% Copper Toroidal Inductor
| Type | Structure type |
Dimension(mm) | uH MIN | Amps | DCR(Ω) MAX |
| A*B*C | |||||
| 001 | Vertical | 9*7*9 | 10 | 0.7 | 0.036 |
| 002 | Vertical | 14*9*14 | 13 | 1 | 0.034 |
| 003 | Vertical | 18*9*18 | 16 | 1.5 | 0.025 |
| 004 | Vertical | 21*13*21 | 35 | 2 | 0.035 |
| 005 | Vertical | 23*12*23 | 60 | 3 | 0.034 |
| 006 | Vertical | 25*12*25 | 70 | 4 | 0.034 |
| 007 | Vertical | 27*15*27 | 100 | 5 | 0.036 |
| 008 | Vertical | 31*18*31 | 100 | 7 | 0.029 |
| 009 | Vertical | 34*29*34 | 130 | 10 | 0.024 |
| 010 | Vertical | 37*20*37 | 250 | 12 | 0.031 |
| 011 | Vertical | 44*19*44 | 150 | 15 | 0.02 |
| 012 | Vertical | 55*22*55 | 350 | 20 | 0.025 |
| 013 | Vertical | 64*23*64 | 110 | 30 | 0.01 |
| 014 | Vertical | 72*27*72 | 220 | 30 | 0.015 |
| 015 | Vertical | 118*42*118 | 200 | 40 | 0.013 |
Core Performance Advantages of 100% Copper Toroidal Inductor
Moreover, full copper toroidal inductors carry multiple exclusive strengths for power circuit design:
- 100% pure enameled copper winding, low DC resistance, less heat generation under continuous full current load;
- Closed toroidal core design, ultra-low flux leakage, weak electromagnetic radiation interference;
- Higher Q factor than bobbin inductors, smaller power loss at 20kHz–500kHz high-frequency operation;
- Compact circular structure saves PCB layout space, supports surface mount and through-hole pin customization;
- Dual core material options: iron powder core for high DC bias resistance, MnZn ferrite core for low high-frequency loss;
- Wide operating temperature range from -40℃ to +125℃, stable performance for industrial and new energy equipment.
Specification Parameters (0903 Toroidal Inductor)
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Furthermore, standardized fixed parameters guarantee consistent mass production performance:
- Winding Material: 100% pure polyurethane enameled copper wire
- Optional Core Material: Iron powder core / MnZn ferrite toroidal core
- Operating Frequency: 20kHz – 500kHz
- Rated Working Current: 1A – 15A customizable
- Operating Temperature: -40℃ ~ +125℃
- Storage Humidity Range: 30% – 95%
- Winding Insulation Grade: 155℃ / 180℃ heat resistant wire optional
Main Application Scenarios
Besides general switching power supply circuits, this full copper toroidal inductor covers multiple industrial and consumer electronics fields:
- High-frequency SMPS power converters, LLC resonant charging modules;
- EMI common-mode filtering circuits for communication power supplies;
- Solar micro-inverter, energy storage auxiliary power circuit;
- Medical isolation power unit, laboratory test power equipment;
- LED industrial driver power, servo drive low-frequency filter choke.
Customization Support
We provide full one-stop customization service for the 100% Copper Toroidal Inductor:
- Custom inductance value, winding turns and wire gauge for target current & impedance demands;
- Custom through-hole pin layout or flat surface mount terminals;
- Optional iron powder / ferrite toroidal core to match different frequency & DC bias demands;
- All inductors comply with RoHS & CE environmental safety standards, test reports available on request;
- Small sample trial orders and mixed batch orders with other toroidal magnetic components are supported.
Matching Supporting Magnetic Components
We supply complete matching power magnetics together with toroidal inductors:
- Full series EE / ERL high frequency ferrite transformers;
- Molded SMD high-current power inductors (CD, NR, RH series);
- Common mode toroidal EMI filter chokes, high voltage power resistors.
Our 100% Copper Toroidal Inductor strictly follows the official toroidal power magnetic component design specifications released by IEEE for high-frequency switching power supply development.
Details:
Main product photo of through-hole toroidal common mode choke with insulated copper winding and ferrite toroidal core
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