74F686AP-3%-TR-RC Equivalent & Substitute Parts

Part Overview

The 74F686AP-3%-TR-RC is a fixed inductor manufactured by Bourns Inc. with an inductance of 6.8 µH, rated for 300 mA, and a DC resistance of 1.85 Ohm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity.

Substiute Parts

74F686AP-3%-TR-RC

Bourns Inc.In Stock: 83674F686AP-3%-TR-RC Datasheet

Current PartRFQ

B78108T1682J000

EPCOS - TDK ElectronicsIn Stock: 843B78108T1682J000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F686AP-3%-TR-RC are identified based on the following critical parameters:

• Inductance Value: 6.8 µH (exact match required)
• Current Rating: Minimum 250 mA (original part rated 300 mA; substitute must support operational current)
• DC Resistance: Maximum 1.85 Ohm (lower or equal values acceptable)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement maintained)
• Mounting Type: Through Hole (mechanical compatibility)

The B78108T1682J000 from EPCOS - TDK Electronics meets these substitution criteria with matching inductance, adequate current rating, and compliant certifications.

Parameter Comparison

Engineering Selection Recommendations

The B78108T1682J000 is a direct substitute for the obsolete 74F686AP-3%-TR-RC based on electrical and mechanical compatibility. Both components are ROHS3 compliant and feature identical inductance values with axial through-hole packaging. The substitute part is currently in active production status, ensuring long-term availability.

The substitute exhibits lower DC resistance (1.45 Ohm Max versus 1.85 Ohm), which provides improved efficiency characteristics. The current rating of 250 mA is lower than the original 300 mA specification; applications operating at or near 300 mA require thermal analysis to confirm adequate margin within the substitute's rating.

Frequently Asked Questions (FAQ)

Q: Can the B78108T1682J000 directly replace the 74F686AP-3%-TR-RC in all applications?

A: Direct replacement is possible for applications operating at or below 250 mA. Applications requiring the full 300 mA rating must be re-evaluated for thermal performance with the substitute part.

Q: What is the significance of the inductance tolerance difference (±3% vs ±5%)?

A: The original part specifies ±3% tolerance, while the substitute specifies ±5%. Applications with tight inductance requirements must account for this wider tolerance band in circuit design.

Q: Are both parts mechanically compatible?

A: Yes. Both components feature axial through-hole packaging and are suitable for identical PCB footprints.

Q: Why is the original part obsolete?

A: The 74F686AP-3%-TR-RC is listed as obsolete by Bourns Inc. The B78108T1682J000 from EPCOS - TDK Electronics is an active product offering equivalent electrical performance.

Q: What compliance certifications apply to the substitute part?

A: The B78108T1682J000 is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.