Cfwlb450khfa B0

The phrase CFWLB450KHFA-B0 refers to a high-precision 450 kHz ceramic band-pass filter manufactured by Murata Manufacturing Co., Ltd. It is a specialized component used primarily in the second intermediate frequency (IF) stages of communication equipment.

Product Overview & Technical Profile

This component belongs to Murata's CFWLB series, which is characterized by a 6-element ladder-form construction housed in a miniature plastic case. Murata Key specifications include:

* Center Frequency ($f_o$): 450 kHz.

* Bandwidth (6dB): $\pm$3.0 kHz minimum (HT grade). Hesta

* Selectivity: High selectivity (50dB min.) designed for sharp signal filtering in narrow-band applications. Rf-Microwave

* Form Factor: Miniature 3+2 leg through-hole configuration, approximately 67% smaller by volume than conventional types. Hesta

* Applications: Primarily found in CB radios, transceivers (like Motorola or Uniden), pagers, and mobile telephones. Hesta

Market Trends & Strategic Insights

The market for this specific part is currently in a transitional phase:

* Obsolescence & Supply Risk: The CFWLB series is widely categorized as legacy technology. Murata has shifted its focus to SMD (Surface Mount Device) alternatives, such as the CFWKA series, for all new design-in activities. Digi-Electronics

* Maintenance & Repair Demand: Despite being obsolete for new designs, there is a steady "long-tail" demand in the repair and maintenance market, particularly for amateur radio and commercial communication hardware. HestaEbay

* Pricing Dynamics: Single-unit retail prices are significantly higher (approx. $4.00–$10.50) compared to modern high-volume filters. HestaHesta This reflects the scarcity and "BOM service" nature of the component.

* Replacement Trends: In new production, traditional ceramic filters are increasingly being replaced by SAW (Surface Acoustic Wave) and BAW (Bulk Acoustic Wave) technologies, which offer better performance for the modern, crowded RF spectrum. Qorvo

Sourcing Guidance

For businesses or technicians searching for this part:

* Availability: While major global distributors may list it as "Obsolete," specialty stockists and B2B platforms like Alibaba still offer new-old-stock (NOS) or original inventory from authorized distributors. Alibaba

* Equivalent Models: If the specific Murata part is unavailable, common drop-in equivalents include the Toko ALFYM450H or the generic LTM450HTW. HestaEbay