CAL45VB681K Equivalent & Substitute Parts

Part Overview

The CAL45VB681K is a 680 µH unshielded wirewound inductor manufactured by Taiyo Yuden, rated for 220 mA continuous current with a maximum DC resistance of 7.8 Ohm. This component is designed for through-hole axial mounting applications requiring fixed inductance in the sub-millihenry range. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives from active manufacturers to support ongoing production and repair requirements.

Substiute Parts

CAL45VB681K

Taiyo YudenIn Stock: 817CAL45VB681K Datasheet

Current PartRFQ

AIAP-01-681K-T

Abracon LLCIn Stock: 836AIAP-01-681K-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAL45VB681K is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 680 µH (±10% tolerance band)
• Mounting type: Through hole axial configuration
• Package classification: Axial wirewound inductor
• Shielding type: Unshielded

Secondary Compatibility Factors:

• Current rating: Substitute must support minimum 220 mA continuous operation
• DC resistance: Lower or equal maximum DCR is acceptable; higher values require circuit validation
• Operating temperature range: Substitute must cover or exceed the application temperature envelope
• Wirewound construction: Maintains electromagnetic performance characteristics

The AIAP-01-681K-T from Abracon LLC meets the primary matching criteria with identical inductance value, tolerance, and axial through-hole configuration. Secondary parameters show acceptable variance within engineering tolerances for this component category.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: AIAP-01-681K-T

The AIAP-01-681K-T is the direct functional equivalent for CAL45VB681K replacement. Selection is based on the following engineering factors:

• Inductance Match: Both components specify 680 µH with ±10% tolerance, ensuring equivalent circuit performance in inductance-dependent applications.
• Package Compatibility: Identical axial through-hole configuration permits direct PCB footprint substitution without layout modification.
• Product Status: The AIAP-01-681K-T is in active production status, ensuring long-term availability and supply chain continuity compared to the obsolete CAL45VB681K.
• Compliance Certifications: The AIAP-01-681K-T carries RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.
• Temperature Range: Extended operating range (-40°C ~ 105°C) provides broader environmental compatibility than the original part.

Current Rating Consideration:

The AIAP-01-681K-T is rated for 180 mA continuous current, compared to 220 mA for the CAL45VB681K. Circuit designs operating at or above 200 mA continuous current require validation to confirm the substitute operates within acceptable thermal and saturation margins.

DC Resistance Advantage:

The substitute exhibits lower maximum DC resistance (6.4 Ohm vs. 7.8 Ohm), resulting in reduced power dissipation and improved thermal performance in the application.

Frequently Asked Questions (FAQ)

Q: Can the AIAP-01-681K-T be used as a direct drop-in replacement for the CAL45VB681K?

A: Yes, for applications operating at or below 180 mA continuous current. Both components share identical inductance values, tolerance specifications, and axial through-hole package configurations. Physical dimensions differ slightly (0.130" Dia x 0.360" L vs. 0.173" Dia x 0.315" L), but both fit standard axial component footprints. Verify circuit current requirements before substitution.

Q: What is the impact of the lower current rating on the AIAP-01-681K-T?

A: The AIAP-01-681K-T is rated for 180 mA continuous current versus 220 mA for the original part. Applications requiring sustained current above 180 mA may experience accelerated core saturation or thermal stress. Circuit analysis is required to confirm the substitute operates within safe margins for the specific application.

Q: Are there physical dimension differences that affect PCB layout?

A: Yes. The CAL45VB681K measures 0.173" Dia x 0.315" L (4.40mm x 8.00mm), while the AIAP-01-681K-T measures 0.130" Dia x 0.360" L (3.30mm x 9.14mm). The substitute is narrower but slightly longer. Standard axial component footprints accommodate both dimensions, but verify clearance in confined board areas.

Q: Does the lower DC resistance of the substitute affect circuit operation?

A: Lower DC resistance (6.4 Ohm vs. 7.8 Ohm) reduces resistive losses and power dissipation, generally improving circuit efficiency. This change does not negatively impact circuit function and may enhance thermal performance. No circuit redesign is required.

Q: What compliance certifications does the substitute carry?

A: The AIAP-01-681K-T is RoHS3 compliant and REACH unaffected. Both components are classified as EAR99 for export control purposes and share the same HTSUS tariff code (8504.50.8000).

Q: Why is the original CAL45VB681K classified as obsolete?

A: Taiyo Yuden has discontinued the CAL45VB681K from active production. The AIAP-01-681K-T from Abracon LLC provides equivalent electrical and mechanical performance with active manufacturing status, ensuring supply availability for new designs and ongoing production support.