Overview: The document provides technical specifications for the CSS/CSSH Series Ultra Precision Current Sensing Chip Resistors by Stackpole Electronics, Inc. These resistors are designed for high power applications with features such as low inductance, high temperature performance, and excellent frequency response.

Features: The resistors are made from a high power metal alloy, offering very low inductance (0.5nH to 5nH) and high temperature performance up to 225°C, with potential operation up to 275°C upon factory consultation. They exhibit low thermal EMF (<1µV/C) and are RoHS compliant.

Electrical Specifications: The resistors are available in various tolerance levels (0.5%, 1%, 2%, 5%) and temperature coefficient of resistance (TCR) values (±50 ppm/ºC, ±25 ppm/ºC, ±15 ppm/ºC). The document provides detailed tables of ohmic ranges and tolerances for different resistor types and codes.

Mechanical Specifications: Dimensions are provided in both inches and millimeters for various resistor types, indicating the precision in manufacturing and design considerations.

Performance Characteristics: The resistors are tested for insulation resistance, dielectric withstanding voltage, and short time overload, with specific test conditions and limits outlined. The operating temperature range is -55°C to +225°C.

Power Derating Curve: A graph illustrates the percentage of rated power against ambient temperature, highlighting the performance at different temperatures.

Ordering Information: The document includes a guide on how to order these resistors, detailing the product series, size, resistance value, and packaging options.

Thermal Management: The document discusses the importance of thermal management in high power applications, suggesting techniques such as wider conductor traces, larger solder pads, and heat sinks to manage heat rise effectively.

Design Considerations: It is noted that the final resistance value can be influenced by board layout and assembly processes, particularly for resistance values ≤ 50 mΩ, which should be considered during design.