SMD Semi-shielded Power Inductor | High Current Power Inductor Manufacturer | Coilmaster Electronics
Manufacturer of SMD semi-shielded power inductor with magnetic epoxy coating for size and cost optimization. Semi-shielded SMD power inductors provide a balance between non-shielded and fully shielded constructions by using a magnetic epoxy coating over a wire-wound drum core. The resin-mixed magnetic compound partially contains flux radiation, offering moderate EMI suppression without the size and cost of a complete shield. This makes semi-shielded inductors ideal for compact power platforms where space efficiency and cost optimization are design priorities. Coilmaster Electronics is a high-current High Current Power Inductors, Automotive Grade Chokes & Inductors,High Frequency and Planar Transformers, LAN Magnetics (RJ45), Multilayer Chip Beads 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.
SMD Semi-shielded Power Inductor
Semi-Shielded Inductors: Resin Magnetic Type for Compact & Cost-Optimized EMI
Semi-shielded SMD power inductors provide a balance between non-shielded and fully shielded constructions by using a magnetic epoxy coating over a wire-wound drum core. The resin-mixed magnetic compound partially contains flux radiation, offering moderate EMI suppression without the size and cost of a complete shield. This makes semi-shielded inductors ideal for compact power platforms where space efficiency and cost optimization are design priorities.
By leveraging ferrite or alloy powder cores, semi-shielded inductors support a wide range of DC-DC converters, battery-powered electronics, and consumer designs requiring predictable EMI control without fully enclosed shielding. The resin layer stabilizes mechanical stress and reduces audible noise, while offering a lighter, smaller package than molded fully shielded inductors.
Select semi-shielded types when moderate EMI performance is required, but size, weight, and cost are the dominant constraints.
Moderate EMI Suppression for Compact Designs
The magnetic epoxy layer provides effective partial shielding, reducing interference compared to non-shielded types. Although not as EMI-tight as molded shielded inductors, semi-shielding strikes a practical balance for mid-power consumer and IoT systems.
Design Trade-Off: When to Use Semi-Shielded
Semi-shielded inductors are not recommended for high ripple, peak-current, or noise-sensitive DC-DC rails where saturation stability and full EMI isolation are critical. In these cases, fully shielded molded types offer superior containment and low DCR performance.
Characteristic
Partial magnetic shielding using resin-mixed soft magnetic powder
Moderate EMI control at smaller size and lighter weight
Available in ferrite or alloy cores for different load behavior
Designed for cost-optimized consumer and mid-power applications
Lower acoustic noise vs. unshielded types
Features
- Reduced EMI vs. non-shielded inductors
- Smaller and lighter than fully shielded molded inductors
- Cost-efficient for high-volume electronics
- Wide footprint availability (2.0 mm ā 8.0 mm)
- Custom inductance options for battery-based designs
- Alloy options for better saturation than ferrite
Applications
- Consumer electronics and wearable device power modules
- Portable computing & battery-powered DC-DC converters
- Automotive subsystems requiring compact EMI management
- LED drivers, small display power rails, handheld controllers
- Cost-sensitive IoT devices requiring moderate EMI control
| Image | name | Size(mm) | Inductance(uH) | Isat(A) | Irms(A) | DCR(mĪ©) | Action |
|---|---|---|---|---|---|---|---|
| 1uH, 1.9A semi-shielded wirewound inductor | 2.1x2.1x1.2 | 1 | 1.9 | 1.7 | 84 | |
|
| 1.5uH, 1.65A resin-shielded power inductor | 2.1x2.1x1.2 | 1.5 | 1.65 | 1.5 | 108 | |
|
| 2.2uH, 1.35A cost effective semi-shielded inductor | 2.1x2.1x1.2 | 2.2 | 1.35 | 1.37 | 128 | |
|
| 3.3uH, 1A Semi-Shielded Wirewound Power Inductor | 2.1x2.1x1.2 | 3.3 | 1 | 1.02 | 228 | |
|
| 4.7uH, 0.9A Resin-Shielded Power Inductor | 2.1x2.1x1.2 | 4.7 | 0.9 | 0.91 | 289 | |
|
| 0.68uH, 2.2A Semi Shielded Chokes | 2.5x2.5x1.0 | 0.68 | 2.2 | 1.57 | 72 | |
|
| 1uH, 1.8A Semi-Shielded SMD Power Inductors | 2.5x2.5x1.0 | 1 | 1.8 | 1.41 | 84 | |
|
| 1.5uH, 1.55A SMD semi-shielded inductors | 2.5x2.5x1.0 | 1.5 | 1.55 | 1.16 | 132 | |
|
| 2.2uH, 1.29A low profile semi-shielded inductors | 2.5x2.5x1.0 | 2.2 | 1.29 | 0.97 | 180 | |
|
| 3.3uH, 1A surface mount semi-shielded inductors | 2.5x2.5x1.0 | 3.3 | 1 | 0.77 | 264 | |
|
| 4.7uH, 0.88A Low DCR semi-shielded inductor | 2.5x2.5x1.0 | 4.7 | 0.88 | 0.67 | 348 | |
|
| 6.8uH, 0.75A high current semi-shielded indcutor | 2.5x2.5x1.0 | 6.8 | 0.75 | 0.57 | 492 |
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SMD Semi-shielded Power Inductor | High Current Power Inductor Manufacturer | Coilmaster Electronics
Located in Taiwan since 1995, Coilmaster Electronics Co., Ltd. has been a manufacturer of magnetic components. Its main magnetic components include, SMD Semi-shielded Power Inductor, 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.