Murata Power Solutions 18475C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 18475C is a 4.7 mH unshielded wirewound inductor rated for 200 mA with a maximum DC resistance of 4.6 Ohm, designed for through-hole axial mounting. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. Substitute parts must maintain the same inductance value and tolerance while accommodating the electrical and mechanical constraints of the original application.

Substiute Parts

18475C

Murata Power Solutions Inc.In Stock: 76818475C Datasheet

Current PartRFQ

5900-472-RC

Bourns Inc.In Stock: 18855900-472-RC Datasheet

MFR RecommendedRFQ

AIAP-02-472K

Abracon LLCIn Stock: 4416AIAP-02-472K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 18475C is determined by the following criteria:

Primary Matching Parameters:

• Inductance value: 4.7 mH (±10% tolerance)
• Inductance test frequency: 1 kHz
• Mounting type: Through hole
• Package type: Axial
• Shielding configuration: Unshielded

Secondary Compatibility Parameters:

• Current rating must meet or exceed 200 mA minimum
• DC resistance must not exceed 4.6 Ohm maximum
• Operating temperature range must encompass or extend the original 0°C ~ 70°C specification

Two substitute parts meet these criteria: the Bourns 5900-472-RC and the Abracon AIAP-02-472K. Both maintain the required inductance, tolerance, and axial through-hole configuration. Differences in current rating, DC resistance, core material, and temperature range reflect design variations within the allowed parameter space.

Parameter Comparison

Engineering Selection Recommendations

Bourns 5900-472-RC is the manufacturer-recommended primary substitute. This part exceeds the original current rating specification (340 mA vs. 200 mA) and provides superior DC resistance performance (3.7 Ohm vs. 4.6 Ohm maximum). The extended operating temperature range (-55°C ~ 105°C) provides additional thermal margin. The part is active in production, RoHS3 compliant, and available in standard tray packaging. The ferrite drum core construction represents a design variation from the original wirewound configuration but maintains electrical equivalence within the specified parameter space.

Abracon AIAP-02-472K is an alternative substitute suitable for applications where the original current rating specification is not exceeded. This part maintains wirewound construction identical to the original design. However, the DC resistance specification (9.66 Ohm maximum) exceeds the original 4.6 Ohm maximum and must be evaluated for circuit impact. The current rating (180 mA) falls below the original 200 mA specification. This part is active in production and RoHS3 compliant. Selection of this substitute requires confirmation that the higher DC resistance and lower current rating do not compromise circuit performance.

Both substitutes are REACH unaffected and carry EAR99 export classification matching the original part.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 5900-472-RC directly replace the Murata 18475C in all applications?

A: The Bourns 5900-472-RC meets all primary matching parameters: 4.7 mH inductance at ±10% tolerance, through-hole axial mounting, and unshielded configuration. The higher current rating (340 mA) and lower DC resistance (3.7 Ohm) represent performance improvements. The extended temperature range (-55°C ~ 105°C) exceeds the original specification. Direct substitution is supported by the manufacturer recommendation and parameter equivalence.

Q: Why does the Abracon AIAP-02-472K have higher DC resistance than the original part?

A: DC resistance variation in wirewound inductors results from differences in wire gauge, winding configuration, and core material selection. The Abracon part specifies 9.66 Ohm maximum compared to the original 4.6 Ohm maximum. This difference must be evaluated in the context of the specific circuit application to determine if the increased resistive loss is acceptable.

Q: What is the significance of the Bourns part using a ferrite drum core instead of wirewound construction?

A: Both wirewound and drum core constructions can achieve the same inductance and tolerance specifications. The ferrite drum core design in the Bourns 5900-472-RC provides improved current handling (340 mA vs. 200 mA) and lower DC resistance (3.7 Ohm vs. 4.6 Ohm). The core material difference does not affect electrical equivalence for the specified parameter set.

Q: Are there packaging differences between the substitute parts?

A: The Bourns 5900-472-RC is supplied in tray packaging, while the Abracon AIAP-02-472K is supplied in bulk packaging. Both maintain identical through-hole axial form factors. Packaging selection depends on production volume and handling requirements.

Q: Do both substitute parts meet current compliance standards?

A: Both the Bourns 5900-472-RC and Abracon AIAP-02-472K are active products with RoHS3 compliance certification. Both are REACH unaffected and carry EAR99 export classification. The original Murata 18475C is obsolete and does not carry current compliance certifications.