AX97-103R3 Equivalent & Substitute Parts

Part Overview

The AX97-103R3 is a 3.3 µH unshielded drum core wirewound inductor manufactured by Triad Magnetics, rated for 2 A continuous current with a maximum DC resistance of 90 mOhm. This surface mount component operates across the temperature range of -40°C to 85°C and is classified as Active product status with ROHS3 compliance. Substitute parts are identified when equivalent inductance values, core materials, mounting types, and electrical performance parameters align within acceptable tolerances for the application, enabling procurement flexibility and supply chain continuity.

Substiute Parts

AX97-103R3

Triad MagneticsIn Stock: 1086AX97-103R3 Datasheet

Current PartRFQ

SRR6603-3R3ML

Bourns Inc.In Stock: 1399SRR6603-3R3ML Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AX97-103R3 is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 3.3 µH (±20% tolerance band)
• Core material: Ferrite
• Core type: Drum core, wirewound construction
• Mounting type: Surface mount
• Inductance test frequency: 100 kHz

Secondary Compatibility Factors:

• Current rating: Equal to or greater than 2 A
• DC resistance: Lower or equal to 90 mOhm maximum
• Operating temperature range: Must encompass or exceed -40°C to 85°C
• RoHS and REACH compliance status

The substitute part SRR6603-3R3ML from Bourns Inc. matches the primary inductance, core material, core type, and mounting specifications. However, the substitute exhibits a reduced current rating of 1.6 A (below the 2 A requirement) and improved DC resistance of 55 mOhm (lower than 90 mOhm). The substitute provides shielding, whereas the main part is unshielded. These differences establish the substitution boundary conditions.

Parameter Comparison

Engineering Selection Recommendations

AX97-103R3 (Primary Selection): Use the AX97-103R3 when the application requires an unshielded inductor with a 2 A current rating and operates within the -40°C to 85°C temperature band. This part is Active status with ROHS3 compliance and REACH unaffected designation, confirming regulatory alignment for current manufacturing standards.

SRR6603-3R3ML (Conditional Substitute): The SRR6603-3R3ML from Bourns Inc. is suitable as a substitute only when the application current requirement does not exceed 1.6 A. The shielded construction of this substitute may provide electromagnetic interference (EMI) mitigation benefits in noise-sensitive applications. The wider operating temperature range (-55°C to 125°C) accommodates extended environmental conditions. Both parts maintain Active product status and full regulatory compliance (ROHS3, REACH unaffected). The improved DC resistance (55 mOhm versus 90 mOhm) reduces power dissipation in the substitute part.

Critical Limitation: The SRR6603-3R3ML current rating of 1.6 A is below the AX97-103R3 specification of 2 A. Applications requiring the full 2 A rating cannot use this substitute without circuit redesign or parallel component configuration.

Frequently Asked Questions (FAQ)

Q: Can the SRR6603-3R3ML replace the AX97-103R3 in all applications?

A: No. The SRR6603-3R3ML has a maximum current rating of 1.6 A, which is below the AX97-103R3 rating of 2 A. Substitution is valid only for applications where the actual operating current does not exceed 1.6 A.

Q: What is the difference between shielded and unshielded inductors?

A: The AX97-103R3 is unshielded; the SRR6603-3R3ML is shielded. Shielded inductors reduce electromagnetic field radiation and are preferred in applications with sensitive analog circuits or high-frequency switching. Unshielded inductors occupy less board space and have lower cost. Selection depends on EMI requirements.

Q: Are both parts RoHS compliant?

A: Yes. Both the AX97-103R3 and SRR6603-3R3ML are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing.

Q: What does the ±20% inductance tolerance mean?

A: Both parts have ±20% inductance tolerance. For a 3.3 µH inductor, the actual inductance value will fall between 2.64 µH and 3.96 µH. This tolerance band must be acceptable for the circuit design.

Q: Why is the DC resistance different between the two parts?

A: DC resistance (DCR) is determined by wire gauge, winding length, and core geometry. The SRR6603-3R3ML has lower DCR (55 mOhm) compared to the AX97-103R3 (90 mOhm), resulting in reduced power dissipation and heat generation in the substitute part.

Q: Can I use the SRR6603-3R3ML if my circuit operates at 2 A?

A: No. Operating the SRR6603-3R3ML at or above its 1.6 A saturation current will cause inductor saturation, loss of inductance, and potential thermal damage. The AX97-103R3 must be used for 2 A applications.

Q: What is the difference in package size between these parts?

A: AX97-103R3 dimensions: 0.287" L × 0.188" W × 0.127" H (7.30mm × 4.78mm × 3.23mm). SRR6603-3R3ML dimensions: 0.260" L × 0.173" W × 0.118" H (6.60mm × 4.40mm × 3.00mm). The substitute is slightly smaller in all dimensions.

Q: Are both parts available in the same packaging format?

A: No. The AX97-103R3 is supplied in Bulk packaging. The SRR6603-3R3ML is supplied in Tape & Reel (TR) format. Packaging format affects handling, storage, and automated assembly processes.