SRU2016-4R7Y: Premium 4.7 H Shielded Fixed Inductor by Bourns Inc.

The SRU2016-4R7Y from Bourns Inc. is a high-reliability drum core wirewound inductor designed for demanding electronic applications. This comprehensive guide explores its technical specifications, design advantages, and diverse use cases to help engineers select optimal components for power conversion, RF circuits, and noise suppression systems.

Product Highlights

• Precision Inductance: 4.7 H 30% tolerance
• Robust Construction: Shielded ferrite drum core with wirewound technology
• High Current Handling: 1.15A continuous current rating
• Compact SMT Package: 2.8mm 2.8mm 1.8mm footprint
• Wide Temperature Range: -40 C to +125 C operation

Detailed Technical Specifications

Electrical Characteristics

Parameter	Value
Inductance	4.7 H 30%
DC Resistance (DCR)	215m
Saturation Current (Isat)	740mA
Q Factor	8 @ 7.96MHz
Self-Resonant Frequency	80MHz

Mechanical Specifications

Feature	Measurement
Dimensions	2.8mm 2.8mm 1.8mm
Weight	Approx. 0.012g
Termination	Nickel barrier with tin plating

Design Advantages

1. Optimized Magnetic Performance

The ferrite drum core construction delivers superior magnetic flux containment with minimal core losses, especially beneficial for switching frequencies up to 80MHz.

2. Enhanced Thermal Management

The shielded design not only reduces EMI but also improves heat dissipation, maintaining stable inductance values across the full operating temperature range.

3. Manufacturing Reliability

Bourns' automated production processes ensure consistent performance with:

• 100% electrical testing
• Automated optical inspection
• Compliance with AEC-Q200 standards

Industry Applications

Power Electronics

Ideal for:

• DC-DC converter input/output filtering
• Voltage regulator modules (VRMs)
• POL (Point-of-Load) converters

RF and Wireless Systems

Excellent for:

• Impedance matching networks
• RF power amplifier circuits
• VCO tank circuits

Automotive Electronics

Reliable performance in:

• ADAS sensor modules
• Infotainment power supplies
• LED driver circuits

Comparative Advantage

The SRU2016-4R7Y outperforms similar inductors with:

• 30% lower DCR than comparable models
• 15% higher saturation current rating
• Shielded construction where competitors often use unshielded designs

Design Considerations

PCB Layout Recommendations

For optimal performance:

• Maintain 0.5mm clearance from other components
• Use thermal relief pads for wave soldering
• Implement ground planes for EMI shielding

Thermal Management

While the inductor is rated for 125 C operation:

• Monitor temperature in high-current applications
• Consider airflow or heatsinking for continuous full-load operation

Purchasing Information

The SRU2016-4R7Y is available through authorized distributors with:

• Standard packaging: 4,000 units per reel
• Sample quantities available
• Custom reel sizes upon request

Conclusion

The Bourns SRU2016-4R7Y represents an optimal balance of performance and size for modern electronic designs. Its combination of high current capability, stable inductance across temperature variations, and compact footprint make it particularly valuable for space-constrained applications requiring reliable power conversion and filtering.

For detailed application notes or to request samples, visit Bourns' official website or contact authorized distributors for technical support and volume pricing options.