W rth Elektronik 7447480102: Premium 1 mH Drum Core Fixed Inductor for Demanding Applications

The W rth Elektronik 7447480102 represents the gold standard in drum core wirewound inductors, offering engineers exceptional performance in power conversion, filtering, and noise suppression applications. As part of W rth's renowned WE-LHMI series, this component delivers reliable operation across industrial, automotive, and consumer electronics applications.

Comprehensive Technical Specifications

Core Construction and Design

Featuring an advanced ferrite drum core with precision wirewound construction, the 7447480102 achieves optimal magnetic flux density while minimizing core losses. The open vertical cylinder design (14.5mm height 10.5mm diameter) promotes natural cooling and simplifies PCB integration.

Electrical Characteristics

• Inductance: 1 mH ( 5% tolerance)
• Current Rating: 800 mA (both maximum and saturation current)
• DC Resistance: 1.15 (ensuring minimal power loss)
• Frequency Performance: Self-resonant at 1.1 MHz, tested at 1 kHz

Environmental Robustness

Engineered for reliability in harsh conditions, this inductor operates across an impressive -40 C to +125 C temperature range, making it suitable for:

• Automotive under-hood applications
• Industrial control systems
• Outdoor telecommunications equipment

Key Advantages Over Competing Inductors

Precision Engineering

The tight 5% inductance tolerance ensures consistent performance in critical circuits like:

• Switch-mode power supply output filters
• DC-DC converter energy storage
• RF impedance matching networks

Optimized Power Handling

With identical 800mA ratings for both maximum current and saturation current (Isat), the 7447480102 maintains stable inductance under load without abrupt performance drops common in inferior designs.

Space-Efficient Design

The compact radial through-hole package (WE-LHMI case style) saves valuable PCB real estate while providing:

• Mechanical stability through robust pin mounting
• Enhanced airflow around the open drum core
• Simplified automated assembly compatibility

Application-Specific Performance

Power Supply Solutions

In buck/boost converters up to 1MHz, this inductor demonstrates:

• Low core losses at high frequencies
• Minimal audible noise generation
• Excellent transient response characteristics

EMI/RFI Filtering

The unshielded design combined with ferrite core properties effectively suppresses:

• Conducted emissions in power lines
• Switching noise in digital circuits
• Interference in sensor signal paths

Automotive Electronics

Proven reliability makes this inductor ideal for:

• ECU power conditioning
• LED driver circuits
• Infotainment system power filters

Design Considerations

PCB Layout Recommendations

For optimal performance:

• Maintain minimum 2mm clearance from heat-sensitive components
• Ensure adequate copper area for heat dissipation
• Position away from high-frequency signal traces

Thermal Management

While the inductor handles 125 C ambient temperatures, consider:

• Adding thermal vias in high-current applications
• Monitoring DCR heating in continuous operation
• Derating guidelines for extreme environments

Why Engineers Choose W rth 7447480102

Compared to generic inductors, this component offers:

• Verified quality - Manufactured under W rth's strict automotive-grade standards
• Long-term availability - Active status ensures design longevity
• Comprehensive documentation - Complete datasheets and SPICE models available
• Global supply chain - Reliable stock at major distributors

Ordering Information

The 7447480102 is available in cost-effective tape-and-reel packaging for automated assembly. Sample quantities can be sourced through authorized distributors with typical lead times of 2-4 weeks for production volumes.

For engineers demanding uncompromising quality in their inductor selection, the W rth Elektronik 7447480102 delivers measurable performance advantages that translate to more reliable end products.