CFWLA455KBFA-B0 Equivalent & Substitute Parts

Part Overview

The CFWLA455KBFA-B0 is a 455kHz ceramic filter manufactured by Murata Electronics, designed for through-hole mounting applications requiring narrow-band filtering at intermediate frequencies. This component operates at 455kHz with a 15kHz bandwidth and 1.5kOhm impedance, housed in a cube package with 5-pin configuration.

The CFWLA455KBFA-B0 is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing production support, maintenance applications, and design continuity where this filter specification remains functionally required.

Substiute Parts

CFWLA455KBFA-B0

Murata ElectronicsIn Stock: 957CFWLA455KBFA-B0 Datasheet

Current PartRFQ

FB450K0000L001

NextGen ComponentsIn Stock: 50899FB450K0000L001 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CFWLA455KBFA-B0 is determined by the following critical parameters:

• Center Frequency: 455kHz (±tolerance acceptable within application requirements)
• Bandwidth: 15kHz (fixed specification for selectivity)
• Impedance: 1.5kOhm (fixed specification for circuit matching)
• Package / Case: Cube, 5-PC Pin (mechanical and electrical interface requirement)
• Mounting Type: Through Hole (PCB assembly compatibility)
• Physical Dimensions: 0.433" L x 0.276" W x 0.315" H maximum (board layout constraint)

The substitute part FB450K0000L001 meets these core substitution criteria with a center frequency of 450kHz, matching bandwidth, impedance, package configuration, and physical dimensions. The 5kHz frequency offset (450kHz vs. 455kHz) falls within acceptable tolerance for ceramic filter applications where the primary selectivity requirement is the 15kHz bandwidth specification.

Parameter Comparison

Engineering Selection Recommendations

The FB450K0000L001 is functionally equivalent to the CFWLA455KBFA-B0 for applications where the 15kHz bandwidth specification is the primary selectivity requirement. Both components share identical package geometry, mounting configuration, impedance, and bandwidth characteristics.

The FB450K0000L001 carries active product status from NextGen Components, ensuring ongoing availability and supply chain continuity. Both components maintain RoHS compliance, satisfying regulatory requirements for new designs and production support.

The insertion loss differential (4dB vs. 5dB) represents a 1dB increase in the substitute part. This parameter difference must be evaluated within the specific circuit application to confirm acceptable signal attenuation levels.

Frequently Asked Questions (FAQ)

Q: Can FB450K0000L001 be used as a direct replacement for CFWLA455KBFA-B0?

A: Yes, for applications where the 15kHz bandwidth and 1.5kOhm impedance are the controlling specifications. The 5kHz center frequency difference (450kHz vs. 455kHz) is within the tolerance band established by the 15kHz bandwidth specification. Physical dimensions and package configuration are identical, enabling direct PCB mounting compatibility.

Q: What is the significance of the 1dB insertion loss difference?

A: The FB450K0000L001 exhibits 5dB insertion loss compared to 4dB for the CFWLA455KBFA-B0. This 1dB increase represents additional signal attenuation through the filter. Circuit-level evaluation is required to confirm this attenuation level remains acceptable for the application's signal-to-noise ratio and gain budget requirements.

Q: Are both components RoHS compliant?

A: Yes. The CFWLA455KBFA-B0 is ROHS3 compliant. The FB450K0000L001 is RoHS compliant. Both components satisfy RoHS regulatory requirements for lead-free manufacturing and restricted substance limitations.

Q: What is the availability status of each component?

A: The CFWLA455KBFA-B0 is obsolete with 937 pieces in current inventory. The FB450K0000L001 is active production status with 50,790 pieces in inventory, providing superior long-term supply chain availability for ongoing production requirements.

Q: Are the physical dimensions identical?

A: Yes. Both components share identical dimensions: 0.433" L x 0.276" W (11.00mm x 7.00mm) with a maximum height of 0.315" (8.00mm). Both use cube package configuration with 5-pin through-hole mounting, enabling direct PCB layout compatibility without redesign.