84473C Fixed Inductor - Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions Inc. 84473C is a 47 µH unshielded wirewound surface mount inductor rated for 420 mA continuous current with a maximum DC resistance of 1.1 Ohm. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductor category.

Substiute Parts

84473C

Murata Power Solutions Inc.In Stock: 179284473C Datasheet

Current PartRFQ

SDR0403-470KL

Bourns Inc.In Stock: 2825SDR0403-470KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 84473C are qualified based on the following electrical and mechanical criteria:

Inductance value must match at 47 µH within the ±10% tolerance band. Current rating of the substitute must equal or exceed the 420 mA requirement of the main part. DC resistance must not exceed 1.1 Ohm to maintain equivalent power dissipation characteristics. Shielding configuration must remain unshielded to preserve electromagnetic compatibility in the target application. Operating temperature range must span -40°C to 125°C minimum. Surface mount packaging and nonstandard case dimensions must be compatible with the PCB footprint. RoHS3 compliance and MSL 1 rating are required for manufacturing and supply chain compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SDR0403-470KL from Bourns Inc. qualifies as a direct substitute for the 84473C based on matching inductance value, tolerance, shielding configuration, operating temperature range, and compliance certifications. The substitute part exceeds the current rating specification at 540 mA versus 420 mA, providing additional design margin. The DC resistance of the substitute at 840 mOhm is lower than the 84473C maximum of 1.1 Ohm, resulting in reduced power dissipation. Both parts maintain Active product status and ROHS3 compliance with MSL 1 moisture sensitivity rating. Physical dimensions differ slightly between the two packages; verification of PCB footprint compatibility is necessary prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the SDR0403-470KL replace the 84473C in all applications?

A: The SDR0403-470KL meets all specified electrical parameters for the 84473C. Physical package dimensions differ slightly (4.50mm x 4.00mm versus 4.50mm x 3.30mm length and width, with height of 4.60mm versus 2.90mm). PCB layout and mounting clearance must be verified for compatibility.

Q: What is the significance of the lower DC resistance in the substitute part?

A: The SDR0403-470KL exhibits 840 mOhm maximum DC resistance compared to 1.1 Ohm for the 84473C. Lower DC resistance reduces I²R power losses in the inductor, improving overall circuit efficiency. This represents an improvement over the original specification.

Q: Are both parts suitable for the same temperature operating range?

A: Both the 84473C and SDR0403-470KL are rated for -40°C to 125°C operating temperature. No thermal derating is required when substituting between these parts within this range.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. Both are classified as Active products with EAR99 export classification and 8504.50.4000 HTSUS code.

Q: How do the current ratings compare?

A: The 84473C is rated for 420 mA continuous current. The SDR0403-470KL is rated for 540 mA continuous current with 780 mA saturation current. The substitute provides 28% higher current capacity, allowing operation with greater design margin in current-limited applications.