SRR1280A-120M: Premium 12 H Shielded Surface Mount Inductor by Bourns Inc.

The SRR1280A-120M from Bourns Inc. represents the gold standard in high-performance surface mount inductors, combining exceptional electrical characteristics with rugged reliability. This comprehensive guide explores why engineers worldwide specify this component for critical power applications.

In-Depth Technical Specifications

Precision Inductance Characteristics

• Nominal Inductance: 12 H ( 20%)
• Test Frequency: 1kHz (industry standard measurement)
• Q Factor: 26 @ 2.52MHz
• Self-Resonant Frequency: 15MHz

Robust Current Handling

• Continuous Current: 5.6A (thermal limited)
• Saturation Current: 6A (Ldrop=30% typical)
• DC Resistance: 28m max (enhances efficiency)

Advanced Construction Details

Military-Grade Materials

• Core: High-permeability ferrite
• Winding: Oxygen-free copper
• Encapsulation: Epoxy resin with magnetic shielding

Environmental Resilience

• Temperature Range: -40 C to +125 C
• Humidity Resistance: 85% RH non-condensing
• Vibration: Meets MIL-STD-202G

Industry-Leading Certifications

The SRR1280A-120M carries multiple qualifications including:

• AEC-Q200 Grade 1 automotive certification
• RoHS 3.0 compliance
• REACH SVHC exemption
• Halogen-free construction

Design Advantages

Space-Efficient Packaging

• Dimensions: 12.5mm 12.5mm 8.0mm (L W H)
• Termination: Sn-plated for excellent solderability
• Weight: 3.2g typical

EMI Reduction Technology

The proprietary shielded design reduces radiated emissions by up to 15dB compared to unshielded alternatives, critical for:

• Automotive radar systems
• Medical equipment
• IoT wireless devices

Application-Specific Performance

Automotive Systems

• 48V mild hybrid converters
• LED driver circuits
• ADAS power supplies

Industrial Power

• Server VRM designs
• Robotics motor drives
• Solar microinverters

Consumer Electronics

• Fast-charging adapters
• Gaming console PSUs
• 4K TV power modules

Competitive Advantages

The SRR1280A-120M outperforms comparable inductors with:

• 15% lower core losses at 1MHz
• 20% better thermal dissipation
• 5000-hour lifespan at 125 C
• Batch-to-batch consistency <3% variation

Designer Resources

Bourns provides comprehensive support including:

• SPICE simulation models
• Thermal derating curves
• Vibration test reports
• Footprint CAD files (Altium, Eagle, OrCAD)

Purchasing Information

Available through authorized distributors in multiple packaging options:

• Tape & Reel (2000 pieces)
• Cut Tape (100 pieces)
• Bulk Pack (50 pieces)

For volume pricing and lead time inquiries, contact our technical sales team today. The SRR1280A-120M is currently in active production with guaranteed long-term availability.