Murata Power Solutions 28332C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 28332C is a 3.3 µH unshielded wirewound inductor rated for 9.3 A continuous current with a maximum DC resistance of 7.5mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across an industrial temperature range of -40°C to 125°C and is RoHS compliant with unlimited moisture sensitivity rating.

Substiute Parts

28332C

Murata Power Solutions Inc.In Stock: 121628332C Datasheet

Current PartRFQ

P1252.332NL

Pulse ElectronicsIn Stock: 1964P1252.332NL Datasheet

MFR RecommendedRFQ

SDR1806-3R3ML

Bourns Inc.In Stock: 1672SDR1806-3R3ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 28332C are qualified based on the following critical parameters:

• Inductance Value: Exact match at 3.3 µH
• Current Rating: Equal to or greater than 9.3 A
• DC Resistance: Comparable performance with acceptable tolerance
• Shielding Configuration: Unshielded topology
• Mounting Technology: Surface mount package
• Operating Temperature Range: Support for -40°C minimum and 125°C minimum upper limit
• Compliance: RoHS and REACH compliance maintained

Both substitute parts meet these core substitution criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

P1252.332NL (Pulse Electronics) is the primary substitute option. This part exceeds the 28332C current rating at 10 A versus 9.3 A, provides an extended operating temperature range to 130°C, and maintains active product status with established supply chain availability. The DCR specification of 8.6mOhm Max represents a 14.7% increase over the original part, which remains within acceptable tolerance for most applications. ROHS3 compliance ensures alignment with current regulatory requirements.

SDR1806-3R3ML (Bourns) serves as a secondary substitute with active product status and ROHS3 compliance. This part features a ferrite drum core construction and achieves the lowest physical height at 0.272 inches. However, the current rating of 7.6 A falls below the original 9.3 A specification, and the DCR of 9.8mOhm Max represents a 30.7% increase. This option is suitable only for applications where the 9.3 A current requirement can be reduced or where thermal performance is not critical.

Frequently Asked Questions (FAQ)

Q: Can the P1252.332NL directly replace the 28332C in all applications?

A: The P1252.332NL meets or exceeds all critical electrical parameters of the 28332C. The higher current rating (10 A vs 9.3 A) and extended temperature range provide design margin. Physical dimensions differ slightly (22.33mm L x 15.14mm W vs 18.50mm L x 15.20mm W), requiring PCB layout verification. Both parts are unshielded wirewound inductors with identical inductance values and unlimited moisture sensitivity.

Q: What are the limitations of the SDR1806-3R3ML substitute?

A: The SDR1806-3R3ML current rating of 7.6 A is 18.3% below the original 28332C specification of 9.3 A. This part is suitable only for applications where the actual operating current does not exceed 7.6 A. The ferrite drum core construction differs from the original wirewound topology. The increased DCR of 9.8mOhm Max will generate higher resistive losses compared to the 28332C.

Q: Are there packaging or mounting differences between these parts?

A: All three parts are surface mount components with nonstandard package dimensions. The P1252.332NL is available in Tape & Reel packaging, while the 28332C and SDR1806-3R3ML specifications do not specify packaging format. Physical height varies: 28332C at 0.299 inches, P1252.332NL at 0.295 inches, and SDR1806-3R3ML at 0.272 inches. PCB footprint and clearance requirements must be evaluated for each substitute.

Q: Do all substitute parts maintain RoHS compliance?

A: Yes. The 28332C is RoHS Compliant, while both P1252.332NL and SDR1806-3R3ML are ROHS3 Compliant. ROHS3 represents the current regulatory standard and provides enhanced compliance assurance. All three parts are REACH Unaffected and carry EAR99 export classification.