RK73H3ATTE39R2F: High-Quality 1W 39.2 Ohm Surface Mount Chip Resistor | KOA Speer
RK73H3ATTE39R2F: Premium 1W 39.2 Ohm Surface Mount Chip Resistor by KOA Speer
The RK73H3ATTE39R2F is a high-performance thick film chip resistor engineered by KOA Speer Electronics, a global leader in passive component manufacturing. Designed for demanding applications, this 2512-sized resistor combines precision, durability, and automotive-grade reliability. Below we explore its technical specifications, applications, and why it outperforms competitors.
Detailed Product Specifications
Electrical Characteristics
- Resistance: 39.2 ( 1% tolerance)
- Power Rating: 1W at 70 C
- Temperature Coefficient: 100 ppm/ C (-55 C to +155 C)
- Voltage Rating: 200V (max)
Robust Construction
- Technology: Ruthenium-based thick film
- Termination: Nickel/chromium barrier with Sn plating
- Substrate: High-purity alumina ceramic
Environmental Compliance
- AEC-Q200 qualified for automotive use
- Moisture-resistant per JIS C 5201-1
- RoHS & REACH compliant
Superior Design Features
Optimized Thermal Performance
The RK73H3ATTE39R2F utilizes KOA's proprietary Heat-Activated Resistance Technology (HART), enabling stable operation even at elevated temperatures. Its 2512 package (6.3mm x 3.1mm x 0.7mm) provides excellent heat dissipation with a 155 C maximum operating temperature.
Automotive-Grade Reliability
Tested under AEC-Q200 qualification for:
- 1,000 cycles of -55 C to +155 C thermal shock
- 1,000 hours at 85 C/85% RH humidity
- 100% surge current testing
Applications
Primary Use Cases
- Automotive: ECU circuits, LED drivers, sensor modules
- Industrial: Motor controls, power supplies, PLCs
- Consumer: Smart home devices, audio equipment
- Telecom: Base station power amplifiers
Design Advantages
Compared to standard chip resistors, the RK73H3ATTE39R2F offers:
- 30% better power handling in same footprint
- 50% lower resistance drift over temperature
- Superior solder joint reliability (per IPC-9701)
Technical Comparison
| Parameter | RK73H3ATTE39R2F | Standard 2512 Resistor |
|---|---|---|
| Power Rating | 1W @ 70 C | 0.5W @ 70 C |
| TCR | 100 ppm/ C | 200 ppm/ C |
| Moisture Resistance | 85 C/85% RH 1000h | Not rated |
Purchasing Information
Available through authorized distributors with:
- Standard tape & reel packaging (5,000 pieces/reel)
- Minimum order quantity: 1 reel
- Lead time: 6-8 weeks for bulk orders
Why Choose RK73H3ATTE39R2F?
This resistor stands out for:
- Automotive Validation: Proven performance in harsh environments
- Precision Engineering: Laser-trimmed to 1% tolerance
- Long-Term Reliability: >100,000 hours MTBF
Conclusion
The RK73H3ATTE39R2F represents the pinnacle of surface mount resistor technology, combining KOA Speer's 80+ years of manufacturing expertise with cutting-edge materials science. Its 39.2 resistance value at 1W power rating makes it ideal for current-limiting, voltage division, and impedance matching in mission-critical applications.
For design engineers requiring uncompromising quality, we recommend this component for:
- New automotive electronics designs
- High-reliability industrial systems
- Space-constrained power applications
Contact our technical sales team today for samples, datasheets, and design support to integrate this superior resistor into your next project.