0.33uH 18A Molded Flat Wire Inductor – High Current, Low DCR
SEP4020EMH-R33M-LF
0.33uH 18A 4x4mm SMD Inductor – High Power, Molded Construction
The SEP4020EMH series is a high-current 0.33uH 18A molded flat-wire inductor, designed for power-dense applications requiring low DCR and superior efficiency. With 4.0 x 4.0 x 2.0mm dimensions, it delivers excellent thermal stability and high saturation current, making it an ideal solution for power electronics, DC-DC converters, and compact PCB layouts. Its hot press manufacturing process enhances core density, ensuring minimal power losses and high efficiency. AEC-Q200 qualified, this inductor is built for automotive, telecom, and industrial applications.
Customization
At Coilmaster Electronics, we know that off-the-shelf inductors don’t always meet your exact requirements. That’s why we provide fully customized solutions, allowing you to specify inductance values, current ratings, core materials, and shielding options. Our flexible manufacturing process supports custom footprints, enhanced EMI shielding, and optimized DCR to meet the most demanding applications. Whether you need a specialized solution for automotive, telecom, or industrial power designs, our engineers work closely with you to develop the ideal inductor that fits your needs.
Leadtime
Struggling with long lead times? At Coilmaster Electronics, we prioritize fast production turnaround without compromising on quality. Our advanced hot press manufacturing technology and flexible production capabilities allow us to scale from small batches to large-volume orders quickly. Whether you need an urgent prototype or mass production, we ensure on-time delivery to keep your project moving forward.
Key features
- Lower core losses
- Higher efficiency
- Mechanical Strength & Durability
- Lower DCR & Higher Current Handling
- Excellent Thermal Stability
- Compact & Consistent Shape for High-Density PCB Design
Applications
- Wearable Devices
- ADAS (Advanced Driver-Assistance Systems)
- Infotainment Systems & Digital Clusters
- LED Lighting Drivers
- 5G Modules & IoT Gateways
- GPS & Asset Tracking Devices
- Embedded Systems & Edge Computing
- DC-DC Converters
- Energy Storage for PMICs (Power Management ICs)
Construction
- Shielded Inductor
Size(mm)
- 4.0x4.0x2.0
Inductance(uH)
- 0.33
Inductance tolerance
- ±20%
Test Frequency(MHz)
- 1
Isat(A)
- 18
Irms(A)
- 9.5
DCR(mΩ)
- 5
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0.33uH 18A Molded Flat Wire Inductor – High Current, Low DCR | 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, 0.33uH 18A Molded Flat Wire Inductor – High Current, Low DCR, 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.





