AX97-30471 Equivalent & Substitute Parts Reference

Part Overview

The AX97-30471 is a 470 µH fixed unshielded drum core wirewound inductor manufactured by Triad Magnetics, rated for 500 mA continuous current with a maximum DC resistance of 1.5Ohm. This surface mount component operates across the temperature range of -40°C to 85°C and is ROHS3 compliant. The part is currently active in production with 1099 units in stock.

Substitute parts are identified when equivalent inductance values, compatible current ratings, and matching core materials are available from alternative manufacturers. Substitution becomes necessary when the primary part reaches end-of-life status, supply constraints occur, or design flexibility is required for cost optimization or performance enhancement within specified electrical and mechanical tolerances.

Substiute Parts

AX97-30471

Triad MagneticsIn Stock: 1144AX97-30471 Datasheet

Current PartRFQ

SRR1005-471K

Bourns Inc.In Stock: 2158SRR1005-471K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AX97-30471 is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 470 µH (exact match required)
• Core material: Ferrite drum core wirewound construction
• Mounting type: Surface mount (SMD)
• Current rating: Minimum 300 mA (substitute must support primary application current demands)
• DC resistance: Maximum 1.6Ohm (acceptable variance within thermal and efficiency constraints)
• Operating temperature range: Minimum -40°C to 85°C coverage
• RoHS compliance: ROHS3 Compliant

Secondary Compatibility Factors:

• Package dimensions: Nonstandard form factor with tolerance for minor dimensional variations
• Shielding configuration: Both shielded and unshielded variants are acceptable based on EMI requirements of the application
• Tolerance: ±10% to ±20% acceptable range

The SRR1005-471K from Bourns Inc. meets all primary matching criteria with equivalent inductance, ferrite core construction, surface mount configuration, and RoHS3 compliance. The substitute part operates across an extended temperature range (-40°C to 125°C) and features shielding, which provides additional EMI suppression compared to the unshielded primary part.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (AX97-30471): Select the AX97-30471 when the application requires the full 500 mA current rating and unshielded configuration is acceptable. This part is actively manufactured and maintains ROHS3 compliance with extended inventory availability (1099 units in stock).

Substitute Part Selection (SRR1005-471K): The SRR1005-471K is suitable for applications where the current requirement does not exceed 300 mA. This substitute offers advantages including tighter inductance tolerance (±10% versus ±20%), extended operating temperature range (-40°C to 125°C), and integrated shielding for EMI reduction. The part is actively produced by Bourns Inc. with higher inventory levels (2086 units in stock) and is supplied in Tape & Reel format for automated assembly processes.

Compliance Verification: Both parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications. Both components are classified under ECCN EAR99 for export control purposes.

Dimensional Compatibility: Minor dimensional variations exist between the primary and substitute parts. The SRR1005-471K is slightly smaller in length (12.70mm versus 13.46mm) and height (5.20mm versus 5.90mm) but marginally wider (10.00mm versus 9.40mm). PCB layout verification is required to confirm mechanical fit within the target application.

Frequently Asked Questions (FAQ)

Q: Can the SRR1005-471K directly replace the AX97-30471 in all applications?

A: Direct substitution is valid only when the application current requirement does not exceed 300 mA. The AX97-30471 is rated for 500 mA continuous current, while the SRR1005-471K is rated for 300 mA. If the circuit draws more than 300 mA, the substitute part will exceed its current rating and may experience thermal stress or inductor saturation.

Q: What is the significance of the shielding difference between these parts?

A: The AX97-30471 is unshielded, while the SRR1005-471K features shielding. Shielding reduces electromagnetic interference (EMI) radiation and susceptibility. In applications sensitive to EMI, the shielded substitute may provide superior performance. In applications where EMI is not a concern, both configurations are functionally equivalent for inductance and current handling.

Q: How do the inductance tolerances affect circuit performance?

A: The AX97-30471 has ±20% tolerance, while the SRR1005-471K has ±10% tolerance. Tighter tolerance means more predictable inductance values across the production batch. For precision filtering, resonant circuits, or impedance matching applications, the ±10% tolerance of the substitute part provides better consistency. For general-purpose filtering applications, both tolerances are typically acceptable.

Q: Are there packaging considerations for automated assembly?

A: The AX97-30471 is supplied in Bulk packaging, while the SRR1005-471K is supplied in Tape & Reel (TR) format. Tape & Reel packaging is optimized for automated pick-and-place assembly equipment. If your manufacturing process uses automated assembly, the SRR1005-471K packaging format is more efficient. Bulk packaging requires manual handling or custom reel preparation.

Q: What is the impact of the extended temperature range of the SRR1005-471K?

A: The SRR1005-471K operates from -40°C to 125°C, compared to -40°C to 85°C for the AX97-30471. The extended upper temperature limit of the substitute part provides additional thermal margin in high-temperature environments. If your application operates above 85°C, the SRR1005-471K is the only suitable option between these two parts.

Q: How do DC resistance differences affect circuit design?

A: The AX97-30471 has 1.5Ohm maximum DCR, while the SRR1005-471K has 1.6Ohm maximum DCR. This 0.1Ohm difference results in slightly higher power dissipation in the substitute part at equivalent current levels. For a 300 mA application, the power dissipation difference is approximately 9 mW (0.1Ohm × 0.3A²). This difference is negligible in most applications but should be verified in thermally constrained designs.

Q: What is the saturation current specification and why is it important?

A: The SRR1005-471K specifies saturation current (Isat) at 450 mA, indicating the current level at which the inductor begins to lose inductance due to core saturation. The AX97-30471 does not specify saturation current in the provided data. Saturation current is critical in switching power supply applications where transient currents may exceed the rated continuous current. The 450 mA saturation specification of the substitute part provides a safety margin above its 300 mA continuous rating.