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Product Detailed Parameters
- Description：RES CHAS MNT 50 OHM 5% 250W
- Series：CHF - RF Power
- Mfr：Bourns Inc.
- Package：Tray
- Function：Termination
- Frequency：0Hz ~ 3GHz
- RF Type：General Purpose
- Secondary Attributes：-
- Mounting Type：Flange Mount
- Package / Case：Flat Box, Terminator
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The CHF9838CBF500R is a chassis-mounted RF termination resistor manufactured by Bourns Inc. It features a nominal resistance of 50 Ohms with a tolerance of 5% and a power rating of 250 Watts. The component operates within a frequency range of 0 Hz to 3 GHz, classifying it as a general-purpose RF IC termination device. It utilizes a flat box terminator package design intended for flange mounting applications. This specific part number is currently listed as obsolete in distributor catalogs.
Feature Summary
- Designed for high-power RF signal termination in general-purpose applications
- Capable of handling significant thermal loads through chassis mounting
- Operates effectively across a broad frequency spectrum up to 3 GHz
Applications
- RF circuit impedance matching and termination
- High-power signal absorption in test equipment
- General-purpose RF system stabilization
Procurement Notes
This component is officially marked as obsolete by the manufacturer. Procurement should focus on verifying end-of-life status and checking for available surplus stock from authorized distributors. Designers must assess supply chain risks associated with discontinued parts and consider long-term availability constraints before finalizing specifications.
Selection Notes
Engineers requiring this specific 50-ohm, 250-watt specification should evaluate the CHF9838 series family for potential alternatives. Since the exact model is obsolete, selecting a current equivalent with identical power ratings, frequency ranges, and mounting configurations is necessary to maintain system performance and reliability without redesigning the mechanical interface.
Part Context
The CHF9838 series represents Bourns' line of high-power RF terminations designed for robust industrial and commercial use. These resistors are engineered to provide stable impedance characteristics under high thermal stress. The CHF9838CBF500R specifically denotes the 50-ohm variant within this chassis-mountable portfolio, serving critical roles in preventing signal reflections in high-frequency environments.
Replacement Considerations
Public data confirms the CHF9838CNF500L as a related model within the same series, offering similar 250W power handling and 50-ohm resistance, though with different tolerance specifications.
