High Current SMD Toroidal Common Mode Choke STRF01 Series High Impedance for DC-DC Converters
STRF01 Series high current common mode inductor,SMT Toroidal Ferrtie Core Common Mode Choke Designed for DC/DC Converter
The STRF01 series high-current SMD toroidal common-mode choke is designed for DC-DC and AC-DC converter applications. The product uses a ferrite toroidal core to provide high common-mode impedance across a wide frequency range, delivering excellent EMI/RFI suppression performance. The low-profile SMD package saves PCB space. The high current capacity and low DCR ensure efficient power conversion. The operating temperature range is -40°C to +125°C (including self-temperature rise), suitable for various harsh environments. It is widely used in DC-DC/AC-DC converters, desktop/laptop power supplies, communication equipment, automotive electronics, and LCD TVs.
Features
- Toroidal ferrite core – high common-mode impedance
- Excellent EMI/RFI suppression performance
- Low-profile SMD design – saves space
- High current carrying capacity
- Low DCR – low power loss
- Operating temperature – -40°C to +125°C
- Compatible with reflow soldering
- Lead-free – RoHS compliant
Applications
- DC-DC converters
- AC-DC converters
- Input filtering (series mode)
- EMI/RFI suppression
- Desktop/laptop power supplies
- LCD monitors
- Communication equipment
- Automotive electronic systems
TECHNICAL INFORMATION
- IDC
- Temp. rise 40℃ Max
- Inductance test
- HP4284A 100KHz 0.1V
- RDC
- QuadTech 1880 Milliohmmeter
- Solder methods
- Vapor Phase, Infrared Reflow
- Resistance to soldering heat
- 260℃ for 10 seconds
- Solvent resistance
- Conforms to MIL-STD-202E
- Weight
- 1.5grams TYP
- Tape & Reel
- 700/reel
More sizes to choose from
Note: Product specifications can be customized.
FAQ
Q: What are the advantages of the toroidal core compared to other core structures?
A: The toroidal core has a closed magnetic circuit structure. Magnetic flux is concentrated inside the core, resulting in very low leakage flux. EMI radiation is much lower than I-core or open-core inductors. The toroidal core also has high magnetic permeability, requiring fewer turns for the same inductance value. This results in lower DCR and higher efficiency.
Q: How to select the rated current?
A: When selecting, ensure the maximum operating current does not exceed the rated value, and consider temperature derating. We recommend selecting a rated current at least 1.2 to 1.5 times the maximum operating current to prevent core saturation, which would reduce filtering performance. Also ensure the component temperature (ambient temperature + temperature rise) does not exceed 125°C.
Q: Does this product support reflow soldering? What is the temperature resistance?
A: Yes. The STRF01 series uses an SMD package and is compatible with reflow soldering. The low-profile design and small size make it suitable for automated SMT production lines. For the specific reflow temperature profile, please refer to the product datasheet.
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