Murata Power Solutions 28472C Fixed Inductor - Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 28472C is a 4.7 µH unshielded wirewound surface mount inductor rated for 8.3 A continuous current with 10 mOhm maximum DC resistance. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 125°C and is suitable for applications requiring fixed inductance in compact surface mount packages.

Substiute Parts

28472C

Murata Power Solutions Inc.In Stock: 89728472C Datasheet

Current PartRFQ

SC4020FH-4R7

Signal TransformerIn Stock: 1221SC4020FH-4R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 28472C is determined by strict equivalence across the following critical parameters:

• Inductance Value: Must be 4.7 µH (exact match required)
• Shielding Configuration: Must be unshielded (matching electromagnetic profile)
• Mounting Type: Must be surface mount (package compatibility)
• Operating Temperature Range: Must support -40°C to 125°C minimum
• Wirewound Type: Must maintain wirewound construction for performance characteristics
• Current Handling: Substitute must support the application's current requirements without exceeding saturation limits

The Signal Transformer SC4020FH-4R7 meets these core substitution criteria through matching inductance, unshielded configuration, surface mount packaging, and operating temperature range. Variations in current rating, DC resistance, and physical dimensions are acceptable provided the substitute meets or exceeds the electrical requirements of the target application.

Parameter Comparison

Engineering Selection Recommendations

The Signal Transformer SC4020FH-4R7 is an active production substitute for the obsolete Murata 28472C. Both components share identical inductance values, unshielded wirewound construction, and matching operating temperature ranges. The SC4020FH-4R7 maintains ROHS3 compliance and is currently in active production with confirmed inventory availability.

Selection of the SC4020FH-4R7 is appropriate for applications where the 7.7 A current rating and 15 mOhm maximum DC resistance are compatible with circuit requirements. Applications requiring the full 8.3 A rating of the original 28472C must evaluate whether the 0.6 A reduction in current capacity affects system performance. The increased DC resistance of 5 mOhm (from 10 mOhm to 15 mOhm maximum) introduces additional power dissipation that must be assessed in thermal budget calculations.

Frequently Asked Questions (FAQ)

Q: Can the SC4020FH-4R7 directly replace the 28472C in all applications?

A: Direct replacement is possible when circuit current requirements do not exceed 7.7 A and the additional 5 mOhm DC resistance does not violate thermal or efficiency specifications. Applications operating at or near the 8.3 A rating of the original part require detailed thermal and performance analysis.

Q: What is the significance of the ±20% inductance tolerance on the SC4020FH-4R7?

A: The SC4020FH-4R7 specifies ±20% inductance tolerance, whereas the 28472C tolerance is not provided in available documentation. Circuit designs must accommodate this tolerance range or implement compensation mechanisms if tight inductance control is required.

Q: Are there physical dimension differences between these parts?

A: Yes. The 28472C measures 0.728" L × 0.598" W × 0.299" H (18.50mm × 15.20mm × 7.60mm), while the SC4020FH-4R7 measures 0.768" L × 0.524" W × 0.272" H (19.50mm × 13.30mm × 6.90mm). PCB layout and thermal clearance must be verified before substitution.

Q: What compliance certifications apply to the SC4020FH-4R7?

A: The SC4020FH-4R7 is ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Both parts carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: Is the SC4020FH-4R7 available in the same packaging format?

A: The SC4020FH-4R7 is supplied in Tape & Reel (TR) packaging, whereas the 28472C packaging format is not specified. Verify packaging compatibility with assembly and procurement requirements.