Murata Power Solutions 18105C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 18105C is a 1 mH unshielded wirewound axial inductor rated for 440 mA with a maximum DC resistance of 1 Ohm. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 18105C operates across a temperature range of 0°C to 70°C and is suitable for through-hole mounting applications requiring fixed inductance values in the 1 mH range.

Substiute Parts

18105C

Murata Power Solutions Inc.In Stock: 78918105C Datasheet

Current PartRFQ

5900-102-RC

Bourns Inc.In Stock: 10445900-102-RC Datasheet

MFR RecommendedRFQ

AIAP-02-102K

Abracon LLCIn Stock: 18367AIAP-02-102K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 18105C are qualified based on the following electrical and mechanical parameters:

• Inductance Value: Must be 1 mH ±10%
• Current Rating: Must meet or exceed 440 mA minimum
• DC Resistance: Must be compatible with circuit requirements
• Shielding Type: Unshielded configuration
• Mounting Configuration: Through-hole axial package
• Tolerance: ±10% inductance tolerance

The substitute parts listed below satisfy these core substitution criteria while offering improved product status (active vs. obsolete) and extended operating temperature ranges in certain cases.

Parameter Comparison

Engineering Selection Recommendations

Bourns 5900-102-RC: This substitute offers the highest current rating at 710 mA, exceeding the 18105C requirement by 61%. The lower DC resistance of 830 mOhm compared to the 18105C's 1 Ohm maximum reduces power dissipation. The extended operating temperature range of -55°C to 105°C provides broader environmental compatibility. ROHS3 compliance and active product status ensure long-term availability and regulatory alignment.

Abracon AIAP-02-102K: This substitute maintains wirewound construction identical to the 18105C. However, the current rating of 400 mA falls below the 18105C specification of 440 mA, making this option unsuitable for applications requiring the full 440 mA rating. The higher DC resistance of 2.3 Ohm maximum increases power dissipation compared to the original part. ROHS3 compliance and active product status are present. This part is appropriate only for applications with reduced current requirements below 400 mA.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 5900-102-RC directly replace the Murata 18105C in all applications?

A: The Bourns 5900-102-RC meets all core substitution criteria: 1 mH inductance, ±10% tolerance, unshielded axial configuration, and through-hole mounting. The higher current rating (710 mA vs. 440 mA) and lower DC resistance (830 mOhm vs. 1 Ohm) represent improvements. Physical dimensions differ slightly (0.453" Dia x 0.900" L vs. 0.539" Dia x 0.719" L), requiring PCB layout verification for space-constrained applications.

Q: Why is the Abracon AIAP-02-102K listed as a substitute if its current rating is below the 18105C specification?

A: The AIAP-02-102K is listed as a manufacturer-recommended substitute but is only suitable for applications where the actual circuit current requirement is 400 mA or lower. If your design requires the full 440 mA rating, this part is not appropriate.

Q: What are the key differences in DC resistance between these parts?

A: The 18105C has 1 Ohm maximum DCR, the Bourns 5900-102-RC has 830 mOhm maximum, and the Abracon AIAP-02-102K has 2.3 Ohm maximum. Lower DCR reduces resistive losses and heat generation. The Bourns option provides the best performance in this regard.

Q: Are there temperature range considerations for substitution?

A: The 18105C operates from 0°C to 70°C. The Bourns 5900-102-RC extends this to -55°C to 105°C, and the Abracon AIAP-02-102K to -40°C to 85°C. If your application requires operation outside the original 0°C to 70°C range, the substitute parts offer extended capability.

Q: Do physical dimensions affect substitution compatibility?

A: Yes. The 18105C measures 0.539" Dia x 0.719" L, while the Bourns 5900-102-RC measures 0.453" Dia x 0.900" L, and the Abracon AIAP-02-102K measures 0.252" Dia x 0.551" L. PCB footprint and component spacing must be verified before substitution, particularly in space-constrained designs.