KOA Speer Electronics, Inc. RK73H2ATTD3011F

RK73H2ATTD3011F General Description

The KOA Speer Electronics RK73H2ATTD3011F is a precision thick film chip resistor designed for high-performance electronic applications, notably within automotive environments and general industrial usage. Characterized by a resistance value of 3.01 kΩ, a tight tolerance of ±1%, and a power rating of 0.25W (1/4 Watt), the device is presented in a standard 0805 (2012 metric) SMD profile. The RK73H2ATTD3011F is fully AEC-Q200 approved, ensuring rigorous reliability and quality standards suitable for demanding circuit designs.

RK73H2ATTD3011F Key Features and Design Characteristics

Within the broader RK73H series, RK73H2ATTD3011F exemplifies KOA Speer's commitment to quality and versatility. The series covers package sizes from miniature 01005 up to 2512, extending applicability across diverse board densities. RK73H resistors feature thick film metal glaze construction—delivering notable heat and weather resistance. Its lead-free termination further ensures compliance with EU RoHS environmental regulations. Importantly, the RK73H2ATTD3011F is optimized for modern automated SMD assembly techniques, supporting both flow and reflow soldering processes.

RK73H2ATTD3011F Size, Structure, and Packaging Information

As an 0805 (2012 metric) chip resistor, the RK73H2ATTD3011F adheres to industry-standard form factors, facilitating seamless integration into contemporary PCB layouts. The device leverages advanced thick film technology supported by moisture resistance features for enhanced durability. Considerations around power derating are essential, especially when ambient or terminal temperatures approach or exceed 70°C, requiring reference to KOA Speer’s derating curves. Its compact construction allows for high-density placements while maintaining thermal integrity under rated loads.

RK73H2ATTD3011F Electrical Specifications and Performance Data

Core electrical specifications define the RK73H2ATTD3011F's suitability for precision circuits: 3.01 kΩ resistance, ±1% tolerance, and 0.25W rated power. Application engineers must assess the maximum allowable voltage using the formula √(Power rating × Resistance value) or refer to the maximum working voltage—whichever is lower. Notably, the resistor supports one-pulse limiting electric power within its overload voltage specification. As with all RK73H devices, careful attention to actual operating conditions—including board thermal performance and continuous pulse endurance—is required to ensure reliability.

RK73H2ATTD3011F Solderability, Environmental Durability, and Reliability Factors

Engineers benefit from RK73H2ATTD3011F’s compatibility with high-throughput SMD assembly processes: both flow and reflow soldering are supported with robust terminal metallurgy. Its thick film design offers moisture resistance and operational stability in harsh conditions, and the device's AEC-Q200 certification furthers confidence for automotive deployments. When designing for high ambient temperatures or PCB layouts with challenging thermal profiles, attention to KOA Speer’s recommended derating and temperature rise guidelines is pivotal. Terminal part temperature, in particular, should be prioritized over ambient ratings for accurate power handling assessment.

RK73H2ATTD3011F Practical Engineering Uses

The RK73H2ATTD3011F is ideal for precision voltage divider circuits, signal conditioning, and automotive electronic modules demanding high reliability. Its tight tolerance and stable temperature coefficient promote use in feedback and sensing applications where accurate resistance ensures stable system performance. The 0805 footprint supports use in both conventional and space-constrained designs, such as automotive control units, industrial process controllers, and high-density sensor arrays.

Alternative or Substitute Models for RK73H2ATTD3011F

Selecting a resistor similar to RK73H2ATTD3011F requires attention to size, tolerance, resistance, power rating, and certification. Alternatives within KOA Speer’s RK73H family, such as RK73H2ATTD301X5F variants (for differing resistance values or tighter tolerances), offer direct substitution possibilities. Other market equivalent models—typically thick film SMD resistors with AEC-Q200 qualification in the 0805 package, 3.01 kΩ resistance, and ±1% tolerance—should be evaluated for electrical and reliability parity.

Conclusion

KOA Speer’s RK73H2ATTD3011F precision chip resistor delivers an optimal blend of reliability, high tolerance, and ease of assembly for engineers targeting automotive and advanced industrial electronics. Careful attention to application circuit parameters, environmental factors, and industry certifications assures a robust, long-term solution for resistor demands in high-performance designs. For teams evaluating board-level components, the RK73H2ATTD3011F stands out for its balance of technical strengths, compliance, and installation versatility.