AX97-20221 Equivalent & Substitute Parts

Part Overview

The AX97-20221 is a 220 µH unshielded drum core wirewound inductor manufactured by Triad Magnetics, rated for 400 mA continuous current with a maximum DC resistance of 1.3 Ohm. 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 881 pieces available in stock.

Substitute parts are identified when equivalent inductance values, current ratings, and core materials are available from alternative manufacturers. Substitution becomes necessary due to inventory constraints, lead time requirements, design flexibility, or specific performance characteristics required for particular applications.

Substiute Parts

AX97-20221

Triad MagneticsIn Stock: 905AX97-20221 Datasheet

Current PartRFQ

SRR1005-221K

Bourns Inc.In Stock: 11411SRR1005-221K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The SRR1005-221K from Bourns Inc. qualifies as a substitute for the AX97-20221 based on the following matching parameters:

Matching Electrical Characteristics:

• Inductance: 220 µH (identical)
• Core Type: Drum Core, Wirewound (identical)
• Core Material: Ferrite (identical)
• Mounting Type: Surface Mount (identical)
• Current Rating: 450 mA (exceeds 400 mA requirement)

Matching Compliance & Environmental:

• RoHS Status: ROHS3 Compliant (identical)
• REACH Status: REACH Unaffected (identical)
• Operating Temperature Range: -40°C to 125°C (encompasses -40°C to 85°C)

Differences in Specifications:

• DC Resistance: 800 mOhm (lower than 1.3 Ohm maximum)
• Shielding: Shielded (versus unshielded)
• Tolerance: ±10% (tighter than ±20%)
• Packaging: Tape & Reel (versus Box)

The substitute part meets or exceeds the electrical performance requirements of the original part while maintaining regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (AX97-20221): The AX97-20221 remains the primary choice when the original design specifications require an unshielded inductor configuration with the specified DC resistance and tolerance parameters. This part is active in production with adequate inventory availability.

Substitute Selection (SRR1005-221K): The SRR1005-221K is suitable as a substitute when the following conditions are met:

1. The application tolerates shielded inductor construction
2. Lower DC resistance (800 mOhm versus 1.3 Ohm maximum) is acceptable or beneficial
3. Tighter inductance tolerance (±10% versus ±20%) is compatible with circuit requirements
4. Extended operating temperature range (-40°C to 125°C) meets or exceeds application needs
5. Tape & Reel packaging format is compatible with assembly processes

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future applications.

Frequently Asked Questions (FAQ)

Q: Can the SRR1005-221K directly replace the AX97-20221 in existing designs?

A: Direct replacement is possible when the circuit design does not specifically require an unshielded inductor. The SRR1005-221K provides equivalent inductance and superior current handling capability. However, the shielded construction and lower DC resistance may alter circuit behavior in sensitive applications. Circuit validation is necessary to confirm compatibility with specific design parameters.

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

A: The AX97-20221 has a maximum DC resistance of 1.3 Ohm, while the SRR1005-221K has a maximum of 800 mOhm. Lower DC resistance reduces power dissipation and heat generation in the inductor. Applications sensitive to power loss or thermal performance may benefit from the substitute part's lower resistance specification.

Q: How does shielding affect inductor performance?

A: The AX97-20221 is unshielded, while the SRR1005-221K is shielded. Shielded inductors reduce electromagnetic interference (EMI) coupling to surrounding components and circuits. Unshielded inductors occupy less board space and may be preferred in applications where EMI is not a concern. The choice depends on circuit layout and electromagnetic compatibility requirements.

Q: Are there packaging considerations when switching between these parts?

A: The AX97-20221 is supplied in Box packaging, while the SRR1005-221K is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for high-volume automated assembly processes, while Box packaging is typical for lower-volume or manual assembly operations. Verify that assembly equipment and processes are compatible with the selected packaging format.

Q: What is the difference in inductance tolerance between these parts?

A: The AX97-20221 has ±20% tolerance, while the SRR1005-221K has ±10% tolerance. Tighter tolerance means more precise inductance values across the production batch. Applications requiring strict inductance specifications benefit from the substitute part's tighter tolerance. Circuits with wider tolerance margins are unaffected by this difference.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both the AX97-20221 and SRR1005-221K are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components in most jurisdictions.