CHF9838CNF500L

Overview

The Bourns CHF9838CNF500L is a high-frequency RF fixed resistor designed for panel mounting applications. It features a thick film technology construction with a nominal resistance of 50 ohms and a tight tolerance of ±1%. The component is rated for a power handling capacity of 250 watts, making it suitable for demanding RF environments. It operates within a frequency range up to 2.2 GHz. The physical dimensions are 24.77 mm in length, 9.53 mm in width, and 3.79 mm in height, housed in a flat chassis mount package.

Feature Summary

• Panel-mount chassis design for secure mechanical installation
• Thick film technology for stable RF performance
• High power rating of 250 watts for robust operation
• Precision tolerance of ±1% for accurate signal termination

Applications

• RF signal termination in high-frequency circuits
• Power absorption in radio frequency transmission systems
• Impedance matching networks requiring precise 50-ohm loads
• Test and measurement equipment load applications

Procurement Notes

Verify the specific manufacturer part number CHF9838CNF500L against official Bourns documentation to confirm current availability status. Note that some distributor listings indicate this component may be obsolete; ensure compatibility with existing designs before procurement. Cross-reference technical specifications such as power rating and frequency limits with the latest datasheet to avoid integration errors.

Selection Notes

Select this component when a high-power, precision 50-ohm termination is required for panel-mounted RF applications. Ensure the system can accommodate the physical footprint of approximately 24.77 x 9.53 mm. Verify that the operating frequency does not exceed 2.2 GHz and that thermal management solutions support the 250-watt dissipation capability. Confirm that the ±1% tolerance meets the circuit's accuracy requirements.

Part Context

This resistor belongs to the CHF9838CNF series from Bourns, which specializes in high-power RF terminations. The series is engineered for stability and reliability in demanding electronic environments. Components in this family typically utilize thick film technology on durable substrates to withstand high power levels while maintaining consistent electrical characteristics over time and temperature variations.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. When evaluating alternatives, ensure any replacement matches the 50-ohm resistance, 250-watt power rating, 2.2 GHz frequency limit, and panel-mount form factor. Verify that the alternative component maintains equivalent tolerance and thermal performance characteristics.