CHF190104CBF500L

Overview

The CHF190104CBF500L is an 800W RF power resistor from Bourns Inc., designed for chassis or panel mounting. It features a 50 Ohm nominal resistance with a ±5% tolerance, operating within a frequency range of 0Hz to 1GHz. The component utilizes thick-film technology and includes a flanged termination for efficient heat dissipation. Physical dimensions are approximately 48.2mm in length, 26.4mm in width, and 8.8mm in height.

Feature Summary

• High-power handling capability of 800W for demanding RF applications
• Thick-film construction ensures stability across the 0Hz to 1GHz frequency spectrum
• Flanged chassis mount design facilitates direct thermal transfer to heatsinks

Applications

• RF power amplifier output terminations
• Signal generator load matching
• Test and measurement equipment dummy loads

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure compatibility with required tolerance and mounting configurations. Confirm that the physical footprint matches the intended chassis cutout dimensions. Request the latest revision of the technical drawing to validate terminal placement and thermal pad specifications before finalizing procurement orders.

Selection Notes

Select this component when high power dissipation is required in RF circuits up to 1GHz. Ensure the mounting surface can handle the thermal load generated by 800W operation. Verify that the 50 Ohm impedance matches the system characteristic impedance to minimize reflections. Consider the physical size constraints of the enclosure relative to the 48.2mm length and 26.4mm width.

Part Context

This part belongs to the Bourns CHF series of moulded thick-film RF resistors. These components are engineered for robust performance in radio frequency environments. The series offers various resistance values and power ratings, with the CHF190104CBF500L representing a high-power variant suitable for critical signal termination tasks.

Replacement Considerations

Consult official substitution lists for equivalent 800W, 50 Ohm RF resistors. Ensure any replacement maintains the same flanged mounting style and frequency response characteristics. Verify that alternative parts meet the same thermal and electrical specifications without requiring mechanical modifications.