FSRH044C00RNB00B Ferrite Core Equivalent & Substitute Parts

Part Overview

The FSRH044C00RNB00B is a solid free hanging ferrite core manufactured by Murata Electronics, designed for electromagnetic interference (EMI) suppression applications. This component features 40 ohm impedance at 100 MHz with a 1.5 mm inner diameter and 3.0 mm length. The part is classified as obsolete, necessitating identification of active equivalent components to maintain supply chain continuity and support ongoing production requirements.

Substiute Parts

FSRH044C00RNB00B

Murata ElectronicsIn Stock: 817FSRH044C00RNB00B Datasheet

Current PartRFQ

74270011

Würth ElektronikIn Stock: 569574270011 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FSRH044C00RNB00B is determined by the following critical parameters:

• Impedance @ Frequency: The substitute must provide equivalent or near-equivalent impedance performance at the specified frequency to maintain circuit functionality
• Type and Design: Round solid ferrite cores ensure mechanical and electrical compatibility within the application
• Dimensional Compatibility: Inner diameter, outer diameter, and length must accommodate the intended wire gauge and mounting configuration
• Mounting Type: Free hanging design ensures compatibility with existing assembly methods
• Compliance Standards: RoHS3 compliance is mandatory for current production environments

The identified substitute, Würth Elektronik 74270011, meets these criteria with 41 ohm impedance at 100 MHz and compatible dimensional specifications.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 74270011 is the qualified substitute for the obsolete FSRH044C00RNB00B. Selection is based on the following factors:

• Product Status: The 74270011 maintains active production status, ensuring long-term availability and supply chain reliability
• Impedance Compatibility: The 41 ohm impedance at 100 MHz provides functionally equivalent performance to the original 40 ohm specification, with a 2.5% variance within acceptable tolerance for ferrite core applications
• Compliance Certification: Both components maintain ROHS3 compliance, satisfying current regulatory requirements
• Dimensional Tolerance: The substitute accommodates minor dimensional variations (ID +0.004", OD +0.020", Length +0.008") consistent with standard ferrite core manufacturing tolerances

Frequently Asked Questions (FAQ)

Q: Can the 74270011 be used as a direct replacement for the FSRH044C00RNB00B?

A: Yes. The 74270011 meets the critical substitution parameters: equivalent impedance at 100 MHz, identical round solid design, compatible free hanging mounting, and ROHS3 compliance. Dimensional variations fall within standard manufacturing tolerances for ferrite cores.

Q: What is the impedance difference between the two parts?

A: The FSRH044C00RNB00B provides 40 ohm impedance while the 74270011 provides 41 ohm impedance at 100 MHz. This 1 ohm difference represents a 2.5% variance and maintains functional equivalence in EMI suppression applications.

Q: Are there packaging differences between these components?

A: The FSRH044C00RNB00B is supplied without specified packaging, while the 74270011 is supplied in tray packaging. Both components are free hanging ferrite cores suitable for manual or automated assembly processes.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both the FSRH044C00RNB00B and 74270011 are ROHS3 compliant. The 74270011 additionally maintains REACH unaffected status, confirming compliance with current environmental regulations.

Q: What are the dimensional tolerances for substitution?

A: The 74270011 has slightly larger dimensions: inner diameter increases by 0.004" (0.10 mm), outer diameter by 0.020" (0.50 mm), and length by 0.008" (0.20 mm). These variations are within standard ferrite core manufacturing tolerances and do not affect functional performance in typical EMI suppression circuits.