CHF9838CBF500L

Overview

The Bourns CHF9838CBF500L is a chassis-mounted RF termination resistor with a nominal resistance of 50 ohms and a power rating of 250 watts. It features a ±5% tolerance and operates within a frequency range of 0 Hz to 3 GHz. The component utilizes thick film technology and is housed in a flat box terminator package designed for flange mounting. Its physical dimensions are approximately 24.77 mm in length, 9.53 mm in width, and 3.79 mm in height.

Feature Summary

• Designed as an RF termination for high-power applications
• Capable of handling 250W power dissipation
• Operates effectively up to 3 GHz frequency

Applications

• RF circuit termination
• High-power signal processing systems
• Test and measurement equipment loads

Procurement Notes

Verify the exact tolerance specification against the manufacturer's datasheet, as some sources indicate ±1% while others list ±5%. Confirm current availability status as this part may be obsolete or discontinued. Ensure the mounting configuration matches your chassis requirements before procurement.

Selection Notes

Select this component for applications requiring precise 50-ohm impedance matching at high power levels. Consider the thermal management capabilities required for 250W dissipation. Verify that the operating frequency does not exceed 3 GHz to ensure optimal performance and impedance stability.

Part Context

This resistor belongs to the CHF9838 series of chassis-mounted terminations from Bourns. These components are engineered for robust performance in RF environments where stable impedance and high power handling are critical. The series offers various resistance values and tolerances to suit different system requirements.

Replacement Considerations

Check for direct substitutes within the CHF9838 series with compatible power ratings and tolerances. Ensure any replacement maintains the same 50-ohm value and 3 GHz frequency limit. Verify mechanical compatibility for flange mounting if space constraints exist.