ELC-3FN6R8N Equivalent & Substitute Parts

Part Overview

The ELC-3FN6R8N is a 6.8 µH unshielded surface mount inductor manufactured by Panasonic Electronic Components, rated for 620 mA continuous current with 360mOhm DC resistance. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production runs and legacy system support.

Substiute Parts

ELC-3FN6R8N

Panasonic Electronic ComponentsIn Stock: 1071ELC-3FN6R8N Datasheet

Current PartRFQ

7447732068

Würth ElektronikIn Stock: 24917447732068 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELC-3FN6R8N is determined by the following critical parameters:

• Inductance Value: Must be 6.8 µH at 100 kHz test frequency
• Current Rating: Must meet or exceed 620 mA continuous current requirement
• DC Resistance: Must not exceed 360mOhm to maintain circuit performance
• Mounting Type: Must be surface mount compatible
• Shielding Configuration: Must be unshielded to match electromagnetic characteristics
• Package Compatibility: Physical dimensions and height must accommodate existing PCB layouts
• Compliance: RoHS and MSL ratings must meet or exceed original specifications

The Würth Elektronik 7447732068 qualifies as a substitute based on matching inductance value, exceeding current rating capability, maintaining unshielded configuration, and providing superior DC resistance performance.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 7447732068 is an active substitute for the obsolete ELC-3FN6R8N. Selection is based on the following engineering criteria:

Electrical Compatibility: Both components provide 6.8 µH inductance at 100 kHz. The substitute exceeds the original current rating (960 mA vs. 620 mA) and provides lower DC resistance (210mOhm Max vs. 360mOhm), resulting in improved thermal performance and reduced power dissipation in the application circuit.

Compliance Status: The substitute maintains RoHS compliance with ROHS3 certification, meeting current regulatory requirements. Both components carry MSL 1 rating, indicating unlimited shelf life under standard storage conditions.

Physical Considerations: The substitute exhibits a larger footprint (4.60mm x 3.00mm vs. 3.20mm x 3.20mm) and greater seated height (2.40mm vs. 1.20mm). PCB layout verification is required to confirm accommodation of these dimensional differences.

Tolerance and Stability: The substitute provides tighter inductance tolerance (±20% vs. ±30%), supporting improved circuit performance consistency.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 7447732068 directly replace the ELC-3FN6R8N without circuit modification?

A: Electrical substitution is valid based on matching inductance value and exceeding current rating. Physical PCB layout verification is mandatory due to dimensional differences, particularly the increased seated height of 2.40mm compared to 1.20mm.

Q: What is the significance of the lower DC resistance in the substitute part?

A: Lower DC resistance (210mOhm Max vs. 360mOhm) reduces resistive losses and heat generation during operation. This improves efficiency and thermal characteristics, particularly in high-current applications approaching the 620 mA rating.

Q: Are there any compliance concerns when substituting the obsolete part?

A: No compliance concerns exist. The substitute maintains RoHS compliance with ROHS3 certification, exceeding the original RoHS Compliant status. Both components carry identical MSL 1 ratings.

Q: How does the tighter tolerance of the substitute affect circuit performance?

A: The ±20% tolerance of the substitute provides better inductance value consistency compared to the ±30% tolerance of the original part. This results in improved circuit performance predictability and reduced variation across production batches.

Q: What is the primary reason for substitution?

A: The ELC-3FN6R8N is classified as obsolete. The Würth Elektronik 7447732068 is an active product with confirmed inventory availability, ensuring long-term supply chain continuity.