Murata Power Solutions 47102SC Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 47102SC is a 1 mH shielded wirewound inductor rated for 400 mA with a maximum DC resistance of 2.54Ohm. This component is designed for surface mount applications in nonstandard 4-lead packaging. The part is currently obsolete, making identification of suitable substitute components essential for ongoing production and maintenance applications. Equivalent parts must maintain the same inductance value, current rating compatibility, and shielding characteristics while meeting modern compliance standards.

Substiute Parts

47102SC

Murata Power SolutionsIn Stock: 92847102SC Datasheet

Current PartRFQ

74477130

Würth ElektronikIn Stock: 185474477130 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 47102SC is determined by the following critical parameters:

Inductance Match: The substitute part must provide 1 mH inductance with ±20% tolerance to maintain circuit functionality.

Current Rating Compatibility: The substitute must support at least 400 mA continuous current rating. The Würth Elektronik 74477130 provides 430 mA, meeting this requirement with margin.

Shielding Requirement: Both the main part and substitute must be shielded to prevent electromagnetic interference in the application.

DC Resistance: The substitute DCR of 1.53Ohm is lower than the main part's 2.54Ohm maximum, which is acceptable as it reduces power dissipation and improves efficiency.

Surface Mount Configuration: Both parts are surface mount devices suitable for automated assembly.

Compliance and Availability: The substitute part is active in production with modern compliance certifications (ROHS3, AEC-Q200), ensuring long-term availability and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 74477130 is the designated manufacturer-recommended substitute for the obsolete Murata 47102SC. Selection is based on the following engineering criteria:

Functional Equivalence: Both parts provide identical 1 mH inductance with matching ±20% tolerance, ensuring circuit performance is maintained.

Current Margin: The 74477130 provides 430 mA rating versus the 47102SC's 400 mA requirement, offering 7.5% additional current capacity for design margin.

Improved DC Resistance: The lower DCR of 1.53Ohm reduces power dissipation compared to the 2.54Ohm maximum of the original part, improving thermal performance.

Extended Temperature Range: The 74477130 operates to 125°C versus 85°C for the original part, providing broader thermal operating envelope.

Active Production Status: The 74477130 is in active production with current inventory availability (1800 pcs), ensuring supply chain continuity.

Compliance Certifications: The substitute meets ROHS3 and AEC-Q200 standards, providing automotive-grade reliability and environmental compliance.

Packaging Consideration: Both parts use nonstandard 4-lead surface mount packages. Physical dimensions are similar (12.00mm vs 12.20mm length/width), with the substitute at 6.00mm height versus 5.00mm for the original. PCB layout verification is required to confirm mechanical fit.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 74477130 directly replace the Murata 47102SC in existing designs?

A: The 74477130 is electrically equivalent for the specified inductance, current rating, and shielding requirements. Physical dimensions are comparable but not identical. PCB footprint and height clearance must be verified before implementation.

Q: What is the significance of the lower DC resistance in the substitute part?

A: The 74477130's 1.53Ohm DCR versus the 47102SC's 2.54Ohm maximum results in reduced power dissipation and improved efficiency. This is a beneficial characteristic that does not compromise substitution compatibility.

Q: Why is the operating temperature range different between the two parts?

A: The 74477130 extends to 125°C versus 85°C for the original part. This expanded range provides additional thermal margin and is not a limitation for substitution in applications operating within the original 85°C specification.

Q: Are there any compliance differences between the original and substitute parts?

A: The 47102SC is RoHS Compliant, while the 74477130 meets the more recent ROHS3 standard. The 74477130 also carries AEC-Q200 automotive-grade certification. Both parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q: What packaging format is available for the 74477130?

A: The 74477130 is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. The original 47102SC packaging format is not specified in available data.

Q: How do the self-resonant frequencies compare?

A: The 47102SC has a self-resonant frequency of 4MHz, while the 74477130 is 1.9MHz. Both values are well above typical operating frequencies for 1 mH inductors in standard applications, ensuring stable performance within the intended frequency range.