Murata Power Solutions 47470C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 47470C is a 47 µH shielded wirewound inductor rated for 1.47 A continuous current with a maximum DC resistance of 298mOhm. This surface mount component operates across the industrial temperature range of -40°C to 85°C and is designed for applications requiring fixed inductance in compact form factors. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for the application.

Substiute Parts

47470C

Murata Power Solutions Inc.In Stock: 87547470C Datasheet

Current PartRFQ

SRF1260-470M

Bourns Inc.In Stock: 3387SRF1260-470M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns SRF1260-470M is identified as a manufacturer-recommended substitute for the 47470C based on the following substitution criteria:

Electrical Compatibility:

• Both parts provide 47 µH inductance when configured for parallel connection (SRF1260-470M parallel configuration)
• Both parts are shielded inductors suitable for EMI-sensitive applications
• DC resistance remains within acceptable operating parameters for the target application

Mechanical Compatibility:

• Both parts are surface mount components with nonstandard package geometries
• Physical dimensions are comparable (12.20mm vs 12.50mm length/width; 5.00mm vs 6.20mm height)
• Both use tape and reel packaging for automated assembly

Compliance & Environmental:

• Both parts maintain ROHS3 compliance
• Both parts have MSL 1 (unlimited moisture sensitivity)
• Both parts are REACH unaffected and classified as EAR99

Operational Constraints:

• The SRF1260-470M in parallel configuration supports 2.71 A continuous current, exceeding the 47470C requirement of 1.47 A
• Operating temperature range of the substitute (-40°C to 125°C) encompasses the main part specification (-40°C to 85°C)

Parameter Comparison

Engineering Selection Recommendations

Selection between the 47470C and SRF1260-470M should be based on the following engineering factors:

Primary Consideration: PCB Footprint Compatibility Both parts use nonstandard package geometries. Physical dimensions differ slightly (12.20mm vs 12.50mm in length/width; 5.00mm vs 6.20mm in height). PCB layout must accommodate the substitute's footprint before selection.

Performance Margin Analysis The SRF1260-470M in parallel configuration provides superior electrical performance: 2.71 A current rating versus 1.47 A requirement, and 86 mOhm DCR versus 298 mOhm maximum. This margin improves thermal performance and reduces power dissipation in the application circuit.

Temperature Operating Range The substitute supports -40°C to 125°C versus the main part's -40°C to 85°C. Applications requiring extended high-temperature operation benefit from the SRF1260-470M specification.

Regulatory & Compliance Status Both parts maintain equivalent ROHS3 compliance, MSL 1 rating, and REACH unaffected status. No compliance barriers exist for substitution.

Availability & Supply Chain The SRF1260-470M maintains higher inventory levels (3298 pcs vs 841 pcs), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the SRF1260-470M directly replace the 47470C without circuit modification? A: Direct replacement requires PCB footprint verification. The substitute's nonstandard package dimensions differ from the main part. If the PCB layout accommodates the larger footprint (12.50mm x 12.50mm x 6.20mm vs 12.20mm x 12.20mm x 5.00mm), electrical substitution is valid. No circuit modifications are required for the parallel configuration, which provides 47 µH inductance equivalent to the original specification.

Q: What is the inductance value when the SRF1260-470M is configured in series? A: The SRF1260-470M provides 188 µH inductance when both coils are connected in series. This configuration is not equivalent to the 47470C and should not be used as a substitute for 47 µH applications.

Q: How do the DC resistance values affect circuit performance? A: The SRF1260-470M parallel configuration provides 86 mOhm maximum DCR compared to the 47470C's 298 mOhm maximum. Lower resistance reduces I²R power dissipation and thermal generation. For applications sensitive to inductor losses, the substitute's lower DCR provides improved efficiency.

Q: Are both parts suitable for high-frequency applications? A: Both parts are shielded inductors designed for surface mount assembly. The 47470C specifies inductance measurement at 10 kHz. The SRF1260-470M does not specify a test frequency in the provided parameters. Frequency-dependent behavior should be verified against application requirements above 10 kHz.

Q: What are the current saturation ratings for each part? A: The 47470C does not specify saturation current in the provided parameters. The SRF1260-470M in parallel configuration provides 3.24 A saturation current, indicating the current level at which inductance begins to degrade. Applications operating near maximum current ratings should reference saturation specifications to ensure linear inductor operation.

Q: Do both parts have identical moisture sensitivity requirements? A: Yes. Both the 47470C and SRF1260-470M carry MSL 1 (unlimited) ratings, indicating no moisture sensitivity restrictions. Standard PCB assembly and storage practices apply to both components.

Q: What compliance certifications apply to both parts? A: Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Regulatory requirements are equivalent between the two components.