Murata Power Solutions 28102C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 28102C is a 1 µH unshielded wirewound inductor rated for 15.5 A continuous current with a maximum DC resistance of 2.6 mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across an industrial temperature range of -40°C to 125°C and is suitable for surface mount applications in power conversion and filtering circuits.

Substiute Parts

28102C

Murata Power Solutions Inc.In Stock: 100228102C Datasheet

Current PartRFQ

SDR1806-1R0ML

Bourns Inc.In Stock: 946SDR1806-1R0ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 28102C is determined by the following critical parameters:

• Inductance Value: Must be 1 µH to maintain circuit functionality
• Shielding Type: Unshielded configuration required for electromagnetic compatibility with original design
• Mounting Type: Surface mount package mandatory for PCB compatibility
• Operating Temperature Range: Must support -40°C to 125°C minimum
• Current Handling Capability: Substitute must support the application's current requirements
• DC Resistance: Lower DCR values are acceptable; higher values may impact efficiency
• Moisture Sensitivity: MSL 1 rating ensures compatibility with standard assembly processes

The Bourns SDR1806-1R0ML meets the core substitution criteria with matching inductance, shielding, mounting type, and temperature range. However, the current rating differential requires application-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

The SDR1806-1R0ML from Bourns is an active product with ROHS3 compliance, providing supply chain continuity for the obsolete 28102C. Both components share identical inductance values, unshielded configuration, surface mount packaging, and operating temperature specifications.

The primary design consideration is current rating: the SDR1806-1R0ML is rated for 10 A continuous current versus the 28102C's 15.5 A rating. Applications operating at or below 10 A continuous current can directly substitute the Bourns part. Applications requiring the full 15.5 A rating must evaluate alternative sources or redesign considerations.

The SDR1806-1R0ML exhibits higher DC resistance (4 mOhm Max versus 2.6 mOhm Max), which will result in increased power dissipation in high-current applications. This parameter difference must be assessed against thermal management capabilities in the target circuit.

Frequently Asked Questions (FAQ)

Q: Can the SDR1806-1R0ML directly replace the 28102C in all applications?

A: Direct substitution is valid only for applications where continuous current does not exceed 10 A. The SDR1806-1R0ML's 10 A rating is lower than the 28102C's 15.5 A specification. Applications requiring higher current must evaluate alternative sources or circuit redesign.

Q: What is the impact of the higher DC resistance in the SDR1806-1R0ML?

A: The SDR1806-1R0ML has a maximum DC resistance of 4 mOhm compared to the 28102C's 2.6 mOhm. This 1.4 mOhm difference increases resistive losses proportionally with current. At 10 A, the additional loss is approximately 0.14 W, which must be considered in thermal budget calculations.

Q: Are the physical dimensions compatible?

A: The components have similar but not identical dimensions. The 28102C measures 18.50mm L × 15.20mm W × 7.60mm H (seated), while the SDR1806-1R0ML measures 18.30mm L × 14.00mm W × 6.90mm H (seated). PCB layout verification is required to confirm mechanical fit.

Q: What is the compliance status of the substitute part?

A: The SDR1806-1R0ML is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Both components carry EAR99 ECCN classification and 8504.50.4000 HTSUS code.

Q: Are moisture sensitivity levels equivalent?

A: Both components are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or assembly processes.