The KOA Speer RD412ATTE is a precision thin film chip resistor designed for applications requiring high stability and accuracy. KOA Speer is a well-known manufacturer of resistors, and this particular series is known for its tight tolerance and excellent temperature coefficient.

Applications:

• Precision Analog Circuits: Used in instrumentation amplifiers, voltage dividers, and other precision analog circuits.
• Medical Equipment: Employed in medical diagnostic and monitoring devices where accuracy is critical.
• Automotive Electronics: Used in automotive sensors and control systems requiring stable resistance values.
• Test and Measurement Equipment: Found in multimeters, oscilloscopes, and other test equipment.
• Industrial Control Systems: Utilized in industrial automation and process control systems.

Features:

• Thin Film Construction: Provides excellent stability and reliability.
• Tight Tolerance: Offers a precise resistance value with minimal deviation.
• Low Temperature Coefficient: Minimizes resistance changes over a wide temperature range.
• Small Size: Compact package allows for high-density circuit designs.
• RoHS Compliant: Complies with Restriction of Hazardous Substances (RoHS) directive.

Benefits:

• Accurate Circuit Performance: Ensures precise and predictable circuit behavior.
• Stable Resistance Values: Maintains resistance values over time and temperature.
• Improved System Reliability: Minimizes the impact of resistance variations on circuit performance.
• Reduced Design Complexity: Simplifies circuit design by providing a stable and predictable resistance.
• Long-Term Stability: Ensures consistent performance over the lifespan of the equipment.

Additional Details:

The RD412ATTE indicates a specific resistance value (determined by the digits after RD, typically in Ohms, and a tolerance code). The power rating of the resistor is an important parameter to consider. It dictates the maximum power that the resistor can dissipate without overheating. The voltage rating is the maximum voltage that can be applied across the resistor without causing damage. The temperature coefficient of resistance (TCR) is a key specification for precision applications, indicating the change in resistance per degree Celsius. The smaller the TCR, the more stable the resistance value over temperature. The datasheet also provides information on the resistor's long-term stability, which is typically expressed as a percentage change in resistance over a certain period of time. Proper soldering techniques are essential for ensuring reliable performance. Avoid overheating the resistor during soldering. Follow the manufacturer's recommendations for soldering temperature and duration. The mounting pads on the PCB should be designed according to the manufacturer's specifications. Proper pad design ensures good thermal contact and prevents stress on the resistor.