Murata Power Solutions 24S220C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 24S220C is a 22 µH shielded wirewound inductor rated for 1.1 A continuous current with a maximum DC resistance of 120mOhm. This component operates across the temperature range of -40°C to 85°C and is designed for surface mount applications in nonstandard package configurations. The part maintains active product status and carries full RoHS3 compliance with unlimited moisture sensitivity rating.

Substitute parts become necessary when the original 24S220C experiences extended lead times, inventory constraints, or when design requirements permit operation within broader electrical specifications. Alternative inductors with equivalent inductance values and compatible current ratings provide functional interchangeability while maintaining circuit performance within specified tolerances.

Substiute Parts

24S220C

Murata Power SolutionsIn Stock: 86424S220C Datasheet

Current PartRFQ

SRR7045-220M

Bourns Inc.In Stock: 15490SRR7045-220M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns Inc. SRR7045-220M qualifies as a direct substitute for the 24S220C based on the following critical parameters:

Inductance Match: Both parts specify 22 µH inductance, ensuring equivalent magnetic energy storage and circuit behavior at the fundamental operating frequency.

Current Rating Compatibility: The SRR7045-220M provides 1.9 A continuous current rating, which exceeds the 24S220C requirement of 1.1 A. This higher rating ensures the substitute operates within safe thermal and saturation margins when used in applications designed for the original part.

DC Resistance Specification: The SRR7045-220M exhibits 70mOhm maximum DCR, which is lower than the 24S220C at 120mOhm. Reduced resistance improves efficiency and minimizes power dissipation in the inductor element.

Shielding Configuration: Both inductors incorporate shielding to contain magnetic fields and reduce electromagnetic interference in adjacent circuit components.

Surface Mount Compatibility: Both parts utilize surface mount technology with nonstandard package dimensions, permitting direct PCB placement without modification to existing footprints.

Compliance Alignment: Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating, satisfying regulatory and environmental requirements.

Parameter Comparison

Engineering Selection Recommendations

The SRR7045-220M from Bourns Inc. serves as a qualified substitute when the 24S220C becomes unavailable. Selection should be based on the following engineering criteria:

Electrical Performance: The substitute maintains identical inductance at 22 µH, ensuring circuit resonance and filtering characteristics remain unchanged. The elevated current rating of 1.9 A provides additional operational margin above the 1.1 A requirement of the original design.

Thermal Considerations: The SRR7045-220M supports operation to 125°C, extending the upper temperature limit by 40°C compared to the 24S220C. Applications operating within the original -40°C to 85°C specification remain fully compatible.

Resistance Profile: Lower DCR in the substitute reduces I²R losses, improving overall power efficiency in switching and filtering applications.

Regulatory Compliance: Both components maintain ROHS3 compliance and carry identical moisture sensitivity ratings, satisfying procurement and environmental requirements without additional qualification.

Physical Integration: Nonstandard package dimensions for both parts require verification of PCB footprint compatibility prior to assembly. Dimensional data should be cross-referenced with layout documentation.

Frequently Asked Questions (FAQ)

Q: Can the SRR7045-220M directly replace the 24S220C without PCB modifications?

A: Direct replacement is possible if the PCB footprint accommodates the nonstandard package dimensions of both parts. The SRR7045-220M measures 7.00mm × 7.00mm × 4.80mm (height), while the 24S220C measures 7.70mm × 7.10mm × 4.50mm (height). Footprint verification is required before assembly.

Q: What is the impact of the lower DC resistance in the SRR7045-220M?

A: Lower DCR (70mOhm vs. 120mOhm) reduces resistive losses and heat generation during operation. This improves efficiency and reduces thermal stress on the component, particularly in high-frequency switching applications.

Q: Are both inductors suitable for high-temperature applications?

A: The 24S220C operates to 85°C maximum, while the SRR7045-220M extends to 125°C. For applications requiring operation above 85°C, the SRR7045-220M provides extended thermal capability within its specified range.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the 24S220C and SRR7045-220M carry ROHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity rating (MSL 1), satisfying identical regulatory requirements.

Q: What is the significance of the higher self-resonant frequency in the SRR7045-220M?

A: The SRR7045-220M exhibits a self-resonant frequency of 21 MHz compared to 15.7 MHz for the 24S220C. This higher frequency extends the usable bandwidth of the inductor and reduces parasitic resonance effects in high-frequency circuit applications.

Q: Is the higher current rating of the SRR7045-220M a concern for circuits designed for 1.1 A?

A: No. The higher current rating (1.9 A) of the substitute provides additional safety margin and does not negatively impact circuits designed for lower current levels. The inductor will operate within normal parameters at reduced current.