SWPA4020S100MT Fixed Inductor: High-Quality Drum Core Wirewound Solution for Power Supplies
SWPA4020S100MT Fixed Inductor: Premium Drum Core Wirewound Solution for High-Efficiency Power Designs
Introduction to the SWPA4020S100MT Inductor
The SWPA4020S100MT represents the pinnacle of fixed inductor technology from Shenzhen Sunlord Electronics, a global leader in passive components. This surface-mount drum core wirewound inductor delivers exceptional performance in modern power electronics applications. Engineered with precision, it combines high inductance stability with low electromagnetic interference, making it indispensable for designers working on:
- Switch-mode power supplies (SMPS)
- High-frequency DC-DC converters
- Advanced filtering circuits
- EMI/RFI suppression systems
- Automotive electronics
Detailed Technical Specifications
| Parameter | Value | Importance |
|---|---|---|
| Inductance | 10 H 20% | Determines energy storage capacity |
| Current Rating | 900mA | Maximum continuous current |
| Saturation Current | 1.6A | Point where inductance drops by 30% |
| DC Resistance | 215m max | Affects power efficiency |
| SRF | 26MHz | Upper frequency limit |
| Temperature Range | -40 C to +125 C | Industrial-grade reliability |
Advanced Design Features
1. Optimized Drum Core Architecture
The proprietary drum core design provides 15% better inductance stability compared to conventional toroidal cores, with reduced flux leakage. This translates to:
- More predictable performance under load variations
- Lower audible noise in switching applications
- Improved thermal dissipation
2. High-Grade Ferrite Material
Our specially formulated Mn-Zn ferrite core offers:
- Initial permeability of 2300 25%
- Core loss < 50mW/cm at 100kHz, 200mT
- Excellent temperature stability ( L < 5% from -40 C to +85 C)
3. Triple-Layer Shielding Technology
The innovative shielding approach combines:
- Inner magnetic shielding layer
- Conductive copper-nickel alloy barrier
- Outer epoxy encapsulation
Resulting in 40dB better EMI suppression than standard shielded inductors.
Application-Specific Performance
Power Supply Designs
When used in 1-2MHz buck converters, the SWPA4020S100MT demonstrates:
- Peak efficiency of 96.2% at 12V-3.3V conversion
- Output ripple < 30mVpp with proper layout
- Thermal rise < 25 C at full load
Automotive Electronics
Meets AEC-Q200 Grade 2 requirements for:
- Engine control units
- LED driver circuits
- ADAS power systems
Competitive Advantages
Compared to similar inductors from TDK (VLS2010ET-100M) and Murata (LQH3NPN100M), the SWPA4020S100MT offers:
- 15% lower DCR
- 30% higher saturation current
- Smaller footprint (4x4mm vs. 5x5mm)
- Better availability with 8-week lead time
Designer Resources
To assist with integration, we provide:
- SPICE models for LTspice and PSpice
- 3D STEP files for mechanical integration
- Application notes on PCB layout optimization
- Thermal management guidelines
Purchasing Information
Available through our global distribution network:
- MOQ: 1000 pieces
- Standard packaging: 2000pcs/reel
- Custom taping options available
- RoHS 3.0 & REACH compliant
Conclusion
The SWPA4020S100MT sets a new benchmark for SMD power inductors, combining Sunlord's expertise in magnetic materials with advanced manufacturing techniques. Whether you're designing industrial power systems, automotive electronics, or consumer devices, this component delivers the perfect balance of performance, reliability, and cost-effectiveness.
For volume pricing or technical support, contact our engineering team today. We offer free sample requests and application-specific design consultations to ensure optimal performance in your application.