KOA Speer Electronics, Inc. RK73H2ATTD3010F

RK73H2ATTD3010F KOA Speer Electronics SMD Resistor Summary

The RK73H2ATTD3010F from KOA Speer Electronics represents a reliable 301 Ω surface-mount thick film chip resistor, designed for modern electronic assemblies requiring both precision and durability in compact formats. Recognized by its EIA-0805 (2012 metric) package, this model provides a resistance tolerance of ±1% and a rated power of 0.25W (1/4W), making it suitable for a wide array of applications—including those within automotive and industrial sectors. Furthermore, the RK73H2ATTD3010F meets the stringent AEC-Q200 automotive qualification, ensuring robust performance in demanding operating environments.

Key Characteristics and Technical Strengths of RK73H2ATTD3010F

The KOA Speer Electronics RK73H2ATTD3010F incorporates several core attributes that distinguish it in the marketplace. The series is constructed using a metal glaze thick film on a high-grade ceramic substrate, providing exceptional heat and weather resistance, which is paramount for longevity and stable operation in fluctuating or harsh conditions. This resistor is engineered for compatibility with both flow and reflow soldering processes, facilitating flexible integration into diverse manufacturing lines. With Pb-free terminations conforming to EU RoHS requirements, the RK73H2ATTD3010F aligns with global environmental regulations, while the series' AEC-Q200 compliance further validates its reliability for automotive applications, where temperature extremes and vibration are common.

Structural Design and Size Specifications of RK73H2ATTD3010F

Physically, the RK73H2ATTD3010F adheres to the industry-standard 0805 (2012 metric) footprint, ensuring straightforward compatibility with automated PCB assembly equipment and high-density board layouts. The chip's construction leverages the durability of thick film technology—combining metal glaze and high-quality ceramics—to minimize the risk of drift or failure under thermal and mechanical stress. For high-temperature environments, engineers should note the need for power derating as ambient or terminal temperatures climb beyond 70°C, referencing manufacturer-provided derating curves to ensure operational safety and performance longevity.

Electrical Specifications and Environmental Ratings for RK73H2ATTD3010F

From an electrical perspective, the RK73H2ATTD3010F delivers a specified rated power of 0.25W and upholds a tight resistance tolerance of 1%. The product's voltage withstand capability is determined either by the rated power and resistance value per the formula $ V = \sqrt{\text{Power} \times \text{Resistance}} $ or by the model’s maximal working voltage, whichever is lower. The resistor’s thick film structure and ceramic substrate ensure not only effective current handling but also enhanced endurance against surges and pulses—a typical requirement in automotive and industrial electronics. Additionally, device reliability has been affirmed through testing compliant with the AEC-Q200 automotive standard, encompassing robustness against thermal cycling, moisture, and mechanical shock. For high-density applications, the device’s low-profile design meets demanding spatial requirements, while its lead-free terminals aid in compliance efforts.

Application Recommendations and Usage Notes for RK73H2ATTD3010F

Engineers selecting the RK73H2ATTD3010F should evaluate board-level thermal dissipation and associated rise in terminal temperatures under actual use conditions, especially when operating close to the resistor’s rated power. Proper adherence to the recommended derating curves is critical to ensure long-term stability. For pulse-load applications, it is essential to validate suitability within the context of actual waveforms and load conditions, as pulse endurance values may vary with board and circuit design; in such cases, empirical evaluation in the target system is advised. The RK73H2ATTD3010F’s 0805 outline facilitates migration or upgrading from legacy footprints, simplifying design transitions for established products aiming for improved precision or higher reliability.

Alternative and Substitute Models for RK73H2ATTD3010F

When considering alternatives or drop-in replacements for the RK73H2ATTD3010F, engineers should look for chip resistors in the 0805 package that offer a 301 Ω resistance with a 1% or tighter tolerance and a 0.25W power rating. The broader RK73H series itself offers similar specifications across various subtypes and value ranges, with models such as RK73H2ATTD3300F or RK73H2ATTD2700F representing potential low-variation substitutes if value adjustments are allowed. Beyond KOA Speer Electronics, comparable thick film chip resistor series from major manufacturers—provided they meet AEC-Q200 testing, environmental, and RoHS compliance—can be considered as candidates for form-fit-function replacement, although specific automotive certifications should be double-checked.

Conclusion

The RK73H2ATTD3010F chip resistor by KOA Speer Electronics stands out as a robust, precise, and reliable option for engineers and procurement professionals seeking 301 Ω surface-mount resistors, particularly where automotive qualification and environmental compliance are critical. Its combination of thick film durability, compact 0805 footprint, and documented electrical performance ensures broad applicability across automotive, industrial, and consumer electronics platforms. A clear understanding of its operational considerations and available equivalents will enable design and supply chain decisions that support both technical and regulatory requirements in modern product development.