Bourns 9230-20 Fixed Inductor 1µH 350mA Equivalent & Substitute Parts

Part Overview

The Bourns 9230-20 is a 1 µH unshielded molded inductor rated for 350 mA with 1Ohm maximum DC resistance, designed for through-hole axial mounting. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Active alternatives with identical or superior electrical characteristics are available from multiple manufacturers.

Substiute Parts

9230-20

Bourns Inc.In Stock: 10039230-20 Datasheet

Current PartRFQ

9230-20-RC

Bourns Inc.In Stock: 17059230-20-RC Datasheet

DirectRFQ

1025-20K

API Delevan Inc.In Stock: 14111025-20K Datasheet

SimilarRFQ

SC301R0KR

TE Connectivity Passive ProductIn Stock: 1079SC301R0KR Datasheet

SimilarRFQ

SC301R0KT

TE Connectivity Passive ProductIn Stock: 2630SC301R0KT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Bourns 9230-20 are grouped based on strict electrical and mechanical compatibility criteria:

Direct Equivalent (Same Manufacturer):

• 9230-20-RC (Bourns Inc.) — Identical electrical specifications with active product status and RoHS3 compliance. Differs only in packaging (Bulk vs. standard) and compliance certification.

Functionally Compatible Substitutes:

• 1025-20K (API Delevan Inc.) — Matches inductance, tolerance, DC resistance, Q factor, and self-resonant frequency. Current rating increased to 390 mA. Operating temperature extended to -55°C ~ 125°C. Identical physical dimensions and axial package.
• SC301R0KR and SC301R0KT (TE Connectivity Passive Product) — Match inductance, tolerance, DC resistance, Q factor, and self-resonant frequency. Current rating increased to 420 mA. Shielded construction (vs. unshielded main part). Larger physical dimensions (0.165" Dia x 0.394" L). Operating temperature -55°C ~ 100°C.

Substitution Logic: All substitute parts maintain the core electrical parameters: 1 µH inductance at ±10% tolerance, 1Ohm maximum DC resistance, 25 @ 25MHz Q factor, and 230MHz self-resonant frequency. Substitutes are acceptable where current rating meets or exceeds 350 mA and operating temperature range encompasses the application requirements. Physical dimension differences and shielding variations must be evaluated for specific circuit board layout and EMI considerations.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 9230-20-RC (Bourns Inc.) This part is the direct equivalent from the original manufacturer with identical electrical and mechanical specifications. It maintains active product status and achieves ROHS3 compliance, addressing the obsolescence of the original 9230-20. Packaging differs (Bulk vs. standard), but electrical performance is identical. This is the preferred choice for direct replacement in existing designs.

Secondary Recommendation: 1025-20K (API Delevan Inc.) This part provides identical physical dimensions and unshielded construction matching the original design. Current rating of 390 mA exceeds the 350 mA requirement. Extended operating temperature range to -55°C ~ 125°C provides additional thermal margin. However, this part does not achieve RoHS compliance. Selection is appropriate for applications where RoHS certification is not required and extended temperature operation is beneficial.

Alternative for Shielded Applications: SC301R0KR or SC301R0KT (TE Connectivity Passive Product) These parts are suitable where shielded construction is required or preferred for EMI mitigation. Current rating of 420 mA provides margin above the 350 mA specification. Both achieve ROHS3 compliance. Physical dimensions are larger (0.165" Dia x 0.394" L vs. 0.095" Dia x 0.250" L), requiring board layout verification. Operating temperature range is -55°C ~ 100°C, which is narrower than the original specification. SC301R0KT (Cut Tape packaging) offers higher inventory availability (2590 Pcs) compared to SC301R0KR (Tape & Reel, 991 Pcs).

Frequently Asked Questions (FAQ)

Q: Can the 9230-20-RC directly replace the obsolete 9230-20? A: Yes. The 9230-20-RC is electrically and mechanically identical to the 9230-20, with the same inductance, current rating, DC resistance, and physical dimensions. The primary difference is active product status and RoHS3 compliance. Packaging format differs (Bulk), but this does not affect electrical performance.

Q: What is the difference between the unshielded 9230-20 and the shielded SC30 series inductors? A: Shielding reduces electromagnetic interference (EMI) radiation and susceptibility. The SC301R0KR and SC301R0KT are shielded variants with identical inductance and DC resistance but larger physical dimensions. Shielding is beneficial in noise-sensitive applications but requires verification that the larger size (0.165" Dia x 0.394" L) fits the circuit board layout.

Q: Are all substitute parts RoHS compliant? A: No. The 9230-20-RC, SC301R0KR, and SC301R0KT achieve ROHS3 compliance. The 1025-20K does not comply with RoHS standards. Selection depends on regulatory requirements for the end application.

Q: Can I use a substitute part with a higher current rating? A: Yes. All substitute parts (1025-20K at 390 mA, SC301R0KR and SC301R0KT at 420 mA) exceed the original 350 mA rating. Higher current ratings provide design margin and do not negatively affect circuit performance when the application current remains at or below 350 mA.

Q: What is the impact of operating temperature range differences? A: The 1025-20K extends the upper temperature limit to 125°C (vs. 105°C for the original). The SC30 series limits operation to 100°C. Selection must ensure the substitute part's temperature range encompasses the application's operating environment. Narrower ranges may restrict use in high-temperature applications.

Q: How do physical dimension differences affect substitution? A: The 1025-20K maintains identical dimensions (0.095" Dia x 0.250" L) and is a direct mechanical fit. The SC30 series (0.165" Dia x 0.394" L) is significantly larger and requires circuit board layout verification to confirm clearance and fit. Dimension changes may necessitate PCB redesign.

Q: What packaging options are available for each substitute? A: 9230-20-RC is supplied in Bulk packaging. 1025-20K is supplied in Cut Tape (CT). SC301R0KR is supplied in Tape & Reel (TR) with 991 Pcs inventory. SC301R0KT is supplied in Cut Tape (CT) with 2590 Pcs inventory. Packaging selection depends on production volume and assembly process requirements.