Bourns 9250-472-RC Equivalent & Substitute Parts

Part Overview

The Bourns 9250-472-RC is a 4.7 µH shielded drum core wirewound inductor rated for 380 mA with a maximum DC resistance of 550 mOhm. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring controlled inductance with ferrite core shielding. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

9250-472-RC

Bourns Inc.In Stock: 11549250-472-RC Datasheet

Current PartRFQ

9250A-472-RC

Bourns Inc.In Stock: 14319250A-472-RC Datasheet

DirectRFQ

1641R-472K

API Delevan Inc.In Stock: 11261641R-472K Datasheet

SimilarRFQ

ER1641-472KM

API Delevan Inc.In Stock: 1132ER1641-472KM Datasheet

SimilarRFQ

ER1641-472KP

API Delevan Inc.In Stock: 988ER1641-472KP Datasheet

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ER1641-472KR

API Delevan Inc.In Stock: 1873ER1641-472KR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 9250-472-RC is determined by the following critical parameters: inductance value (4.7 µH), tolerance (±10%), current rating (minimum 380 mA), DC resistance (550 mOhm maximum), shielding requirement (shielded), axial through-hole package, and physical dimensions (0.162" Dia x 0.410" L).

The substitute parts are grouped into two categories:

Direct Substitutes (Active Status): Parts meeting all electrical and mechanical specifications with current product availability. The 9250A-472-RC from Bourns represents a direct upgrade path, featuring identical electrical performance with extended operating temperature range (-55°C to 125°C) and active product status.

Functional Equivalents (Alternative Manufacturers): Parts from API Delevan Inc. (1641R-472K, ER1641-472KM, ER1641-472KP, ER1641-472KR) that match core electrical parameters but may differ in core material (iron vs. ferrite), shielding configuration, or compliance certifications. These parts maintain the same inductance, tolerance, current rating, DC resistance, and physical dimensions.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: The 9250A-472-RC from Bourns is the preferred substitute. It maintains ferrite core construction identical to the original 9250-472-RC, preserves shielding characteristics, and achieves ROHS3 compliance. The extended operating temperature range (-55°C to 125°C) provides additional thermal margin. Active product status ensures long-term availability and supply chain stability.

Secondary Options: The 1641R-472K from API Delevan Inc. offers ROHS3 compliance with a marginally higher current rating (390 mA vs. 380 mA). Iron core construction may introduce different frequency response characteristics compared to the ferrite core original. This part is suitable for applications where core material substitution is acceptable.

Conditional Alternatives: The ER1641-472KM and ER1641-472KP variants provide identical electrical specifications but carry RoHS non-compliance status. These are appropriate only for applications where RoHS certification is not required. The ER1641-472KR is unshielded and introduces electromagnetic interference considerations; use only when shielding is not functionally necessary.

Compliance Consideration: Applications requiring ROHS3 compliance should exclude ER1641-472KM, ER1641-472KP, and ER1641-472KR from selection.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-472-RC directly replace the obsolete 9250-472-RC?

A: Yes. The 9250A-472-RC maintains all critical electrical parameters (4.7 µH inductance, 380 mA current rating, 550 mOhm DCR), core material (ferrite), shielding, and physical dimensions. The extended temperature range and active product status make it the direct successor.

Q: What is the difference between ferrite and iron core inductors in these substitutes?

A: The original 9250-472-RC uses ferrite core material, while API Delevan alternatives (1641R-472K, ER1641 series) use iron core. Both achieve the specified inductance and Q factor at 7.9 MHz, but core material affects frequency response characteristics and temperature stability. Ferrite cores typically provide better high-frequency performance, while iron cores offer different saturation behavior.

Q: Are the API Delevan parts suitable for new designs?

A: The 1641R-472K is suitable for new designs with ROHS3 compliance requirements. The ER1641 series (ER1641-472KM, ER1641-472KP, ER1641-472KR) are active products but carry RoHS non-compliance status, limiting their use to applications without regulatory compliance mandates.

Q: What is the significance of the ER1641-472KR being unshielded?

A: The ER1641-472KR lacks electromagnetic shielding, which may allow coupling with adjacent circuit elements. Use this variant only in applications where shielding is not functionally required. For circuits sensitive to electromagnetic interference, select shielded alternatives.

Q: How do packaging options affect part selection?

A: The 9250A-472-RC is supplied in bulk packaging, while ER1641-472KM and ER1641-472KP use tape and reel format suitable for automated assembly. The 1641R-472K is bulk packaged. ER1641-472KR is cut tape format. Select packaging based on assembly process requirements and volume needs.

Q: Is the 390 mA current rating of the 1641R-472K compatible with 380 mA applications?

A: Yes. The 1641R-472K's 390 mA rating exceeds the 380 mA requirement, providing adequate current handling capacity. The higher rating does not create compatibility issues for applications designed around 380 mA operation.