AX97-20681 Equivalent & Substitute Parts Reference

Part Overview

The AX97-20681 is a 680 µH unshielded drum core wirewound inductor manufactured by Triad Magnetics, rated for 100 mA maximum current with 3.5Ohm DC resistance. 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 1001 pieces available in stock.

Substitute parts are identified when equivalent inductance values, compatible mounting types, and acceptable electrical performance parameters align with application requirements. Alternative components may be necessary due to inventory constraints, specific performance enhancements, or design optimization needs.

Substiute Parts

AX97-20681

Triad MagneticsIn Stock: 1052AX97-20681 Datasheet

Current PartRFQ

SRR1005-681K

Bourns Inc.In Stock: 1634SRR1005-681K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AX97-20681 is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 680 µH (exact match required)
• Mounting type: Surface Mount (SMD)
• Core type: Drum Core, Wirewound
• Core material: Ferrite

Secondary Compatibility Parameters:

• Current rating: Equal to or greater than 100 mA
• DC resistance: Lower or equal to 3.5Ohm
• Operating temperature range: Must encompass or exceed -40°C to 85°C
• RoHS compliance: ROHS3 Compliant

The SRR1005-681K from Bourns Inc. qualifies as a substitute part because it maintains the same inductance value (680 µH), identical core construction (drum core, wirewound ferrite), and surface mount packaging. The substitute demonstrates enhanced electrical performance with higher current rating (260 mA versus 100 mA) and lower DC resistance (2.3Ohm versus 3.5Ohm maximum).

Parameter Comparison

Engineering Selection Recommendations

AX97-20681 Selection Criteria:

• Primary choice when unshielded inductor configuration is required
• Suitable for applications operating within -40°C to 85°C temperature range
• Appropriate for circuits with maximum current draw of 100 mA
• RoHS3 compliance satisfies environmental regulatory requirements

SRR1005-681K Selection Criteria:

• Preferred when shielded inductor construction is necessary to minimize electromagnetic interference
• Applicable for circuits requiring higher current capacity (up to 260 mA)
• Suitable for extended temperature operation up to 125°C
• Lower DC resistance (2.3Ohm) reduces power dissipation in current-limited applications
• Tighter inductance tolerance (±10%) provides improved circuit performance stability
• RoHS3 compliance satisfies environmental regulatory requirements

Both parts maintain active production status and are available in adequate inventory quantities. Selection between these components depends on specific application requirements regarding shielding, current capacity, temperature range, and tolerance specifications.

Frequently Asked Questions (FAQ)

Q: Can SRR1005-681K directly replace AX97-20681 in all applications?

A: Direct substitution is possible when the application does not require unshielded inductor characteristics. The SRR1005-681K provides superior electrical performance with higher current rating and lower DC resistance. However, the shielded construction of the SRR1005-681K differs from the unshielded AX97-20681, which may affect electromagnetic field distribution in sensitive circuit layouts.

Q: What is the significance of the inductance tolerance difference?

A: The AX97-20681 has ±20% tolerance while the SRR1005-681K has ±10% tolerance. Tighter tolerance in the substitute part results in more consistent inductance values across production batches, which improves circuit performance predictability and reduces design margin requirements.

Q: Are both parts suitable for high-temperature applications?

A: The AX97-20681 operates to 85°C maximum, while the SRR1005-681K operates to 125°C. For applications requiring extended temperature operation beyond 85°C, the SRR1005-681K is the appropriate selection.

Q: How do the packaging formats differ?

A: The AX97-20681 is supplied in Box packaging, while the SRR1005-681K is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for high-volume automated assembly processes, whereas Box packaging is typical for lower-volume or manual assembly applications.

Q: What is the impact of DC resistance difference on circuit performance?

A: The SRR1005-681K has 2.3Ohm maximum DC resistance compared to 3.5Ohm for the AX97-20681. Lower DC resistance reduces I²R power dissipation, resulting in lower component temperature rise and improved efficiency in current-carrying applications.

Q: Are both parts RoHS3 compliant?

A: Yes, both the AX97-20681 and SRR1005-681K are RoHS3 compliant and REACH unaffected, satisfying environmental and regulatory requirements for electronic component manufacturing and use.