330uH 12A Power-line EMI choke using center-leg air-gapped Mn-Zn core for higher saturation current | Magnetic components | Transformer, Inductor, Choke Manufacturer | Coilmaster Electronics
This 330uH 12A common mode choke is designed with a gapped Mn-Zn ferrite center-leg structure to support higher saturation current while ensuring stable inductance across varying load conditions. Its 27.5 × 25 × 10 mm footprint fits seamlessly into AC/DC converters, industrial power modules, LED drivers, and switched-mode power supplies that require reliable common-mode noise filtering. The robust winding layout and optimized ferrite geometry deliver consistent performance in compact power designs.
Engineered for broadband EMI suppression, this air-gapped Mn-Zn common mode inductor provides strong attenuation across key noise bands. At 1 MHz, it achieves approximately 29 dB of common-mode noise reduction, and even at 100 MHz it maintains around 21 dB, giving designers a wide usable filtering range. The enhanced saturation capability from the gapped center-post core supports up to 12A Irms, making it suitable for demanding power-line filtering and mid-frequency interference mitigation.
With its high-current capability and extended high-frequency response, this 330uH choke helps improve conducted EMI margins in SMPS, mains-operated LED lighting systems, and compact DC/DC architectures. The through-hole package enhances mechanical stability, while the controlled leakage inductance contributes to better differential-mode filtering. Its combination of air-gap-enhanced saturation performance and wideband attenuation makes it a dependable choice for designs targeting both regulatory compliance and long-term reliability. Coilmaster Electronics is a high-current 330uH 12A Power-line EMI choke using center-leg air-gapped Mn-Zn core for higher saturation current, 330uH 12A High-current common mode choke with gapped center-post ferrite core for improved saturation performance manufacturer from Taiwan since 1995. Coilmaster offers AEC-Q200 certified, high-efficiency power inductors, chokes, and transformers. Specializing in low-loss, high-current components for Automotive, 5G, and Industrial applications. Contact our experts for instant support. With more than 20 years of experience in magnetic territory, Coilmaster Electronics is specialized in the production of SMD power inductors, common mode choke, high frequency transformers.
330uH 12A Power-line EMI choke using center-leg air-gapped Mn-Zn core for higher saturation current
CMT2711-331-LF
330uH 12A High-current common mode choke with gapped center-post ferrite core for improved saturation performance
This 330uH 12A common mode choke is designed with a gapped Mn-Zn ferrite center-leg structure to support higher saturation current while ensuring stable inductance across varying load conditions. Its 27.5 × 25 × 10 mm footprint fits seamlessly into AC/DC converters, industrial power modules, LED drivers, and switched-mode power supplies that require reliable common-mode noise filtering. The robust winding layout and optimized ferrite geometry deliver consistent performance in compact power designs.
Engineered for broadband EMI suppression, this air-gapped Mn-Zn common mode inductor provides strong attenuation across key noise bands. At 1 MHz, it achieves approximately 29 dB of common-mode noise reduction, and even at 100 MHz it maintains around 21 dB, giving designers a wide usable filtering range. The enhanced saturation capability from the gapped center-post core supports up to 12A Irms, making it suitable for demanding power-line filtering and mid-frequency interference mitigation.
With its high-current capability and extended high-frequency response, this 330uH choke helps improve conducted EMI margins in SMPS, mains-operated LED lighting systems, and compact DC/DC architectures. The through-hole package enhances mechanical stability, while the controlled leakage inductance contributes to better differential-mode filtering. Its combination of air-gap-enhanced saturation performance and wideband attenuation makes it a dependable choice for designs targeting both regulatory compliance and long-term reliability.
Customization
Due to the solid background of our engineer team at ferrite powder territory, we could modify the core powder, design and produce the most suitable product to fit customer's applications. Except for the standard characteristic of our series specification, Coilmaster Electronics also offer the customization product with low minimum order quantity (MOQ), tighter tolerance, different inductance and frequency applications.
Leadtime
Coilmaster’s standard lead time is 6~8 weeks, in urgent case, the fast delivery program is available. For specific product series, we could send out the goods within 10 or 20 working days.
Key features
- High-current capability
- Robust mechanical construction
- Consistent EMI performance under load
- Low-profile through-hole package
Applications
- Wideband EMI attenuation: ~20 dB @ 2 MHz and ~17 dB @ 100 MHz
- Thermally stable magnetic behavior under long-duration high load
- Balanced dual-winding structure for consistent common-mode suppression
- Mn-Zn ferrite core with controlled air-gap for stable high-current inductance
Construction
- Common Mode Choke
Size(mm)
- 27.5x25x10
Inductance(uH)
- 330
Inductance tolerance
- ±40%
Test Frequency(MHz)
- 0.1
Irms(A)
- 12
DCR(mΩ)
- 6
Additional Notes
Hi-Pot : 1500 (V)
Rated Voltage : 250 (V)
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330uH 12A Power-line EMI choke using center-leg air-gapped Mn-Zn core for higher saturation current | Magnetic components | Transformer, Inductor, Choke Manufacturer | Coilmaster Electronics
Located in Taiwan since 1995, Coilmaster Electronics Co., Ltd. has been a manufacturer of magnetic components. Its main magnetic components include, 330uH 12A Power-line EMI choke using center-leg air-gapped Mn-Zn core for higher saturation current, common mode chokes, SMD molding power chokes, chock coil inductors, SMD shielded and semi-shielded power inductors, low profile and high current power inductors, high voltage power inductors, ethernet and LAN power transformers, flat wire inductors, RJ45 jacks with integrated magnetics and high frequency transformers, and ceramic or air coil multilayer chip inductors.
Coilmaster offers AEC-Q200 certified, high-efficiency power inductors, chokes, and transformers. Specializing in low-loss, high-current components for Automotive, 5G, and Industrial applications. Contact our experts for instant support. With more than 20 years of experience in magnetic territory, Coilmaster Electronics is specialized in the production of SMD power inductors, common mode choke, high frequency transformers.
Coilmaster Electronics has been providing customers with high current power inductors since 1995, with both advanced technology and 29 years of experience, Coilmaster Electronics ensures that each customer's requirements are met.