ELC-15E390L Equivalent & Substitute Parts

Part Overview

The ELC-15E390L is a 39 µH shielded drum core wirewound inductor manufactured by Panasonic Electronic Components, rated for 3.8 A continuous current with 33 mOhm DC resistance. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. Substitute parts must maintain the same inductance value, core material, mounting configuration, and electrical performance within specified tolerances to ensure circuit compatibility.

Substiute Parts

ELC-15E390L

Panasonic Electronic ComponentsIn Stock: 943ELC-15E390L Datasheet

Current PartRFQ

AIUR-15-390K

Abracon LLCIn Stock: 1206AIUR-15-390K Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELC-15E390L are identified based on the following critical parameters:

• Inductance Value: 39 µH (±10% tolerance maintained)
• Core Material: Ferrite drum core construction
• Mounting Configuration: Through hole, radial lead orientation
• Current Handling: Minimum 3.8 A rating required
• DC Resistance: Maximum 38 mOhm acceptable (within 15% variance of original specification)
• Environmental Compliance: ROHS3 compliance required
• Lead Configuration: 3-lead radial vertical cylinder package

The AIUR-15-390K from Abracon LLC meets these substitution criteria with enhanced current rating (4.5 A) and comparable DC resistance (38 mOhm max), though it features an unshielded design. This difference in shielding must be evaluated against specific circuit EMI requirements.

Parameter Comparison

Engineering Selection Recommendations

The AIUR-15-390K qualifies as a functional substitute based on matching inductance, tolerance, core material, and through-hole mounting configuration. Both components maintain ROHS3 compliance and ferrite core construction. The substitute part provides superior current handling capacity (4.5 A versus 3.8 A), reducing thermal stress in applications operating near rated current limits.

The primary design consideration is the transition from shielded to unshielded construction. In circuits where electromagnetic shielding is mandatory for noise suppression or regulatory compliance, the unshielded design of the AIUR-15-390K may introduce coupling effects requiring circuit-level mitigation. In applications where shielding is not a functional requirement, the substitute offers improved availability and active product status.

DC resistance variance (33 mOhm to 38 mOhm maximum) represents a 15% increase, which may affect power dissipation calculations in high-current applications. This difference must be evaluated against thermal design margins.

Frequently Asked Questions (FAQ)

Q: Can the AIUR-15-390K directly replace the ELC-15E390L in all applications?

A: Direct substitution is valid for inductance value, current rating, and mounting compatibility. However, the transition from shielded to unshielded construction requires circuit-level evaluation. Applications sensitive to electromagnetic coupling or operating in high-noise environments may require additional filtering or layout modifications.

Q: What is the significance of the current rating difference (3.8 A vs. 4.5 A)?

A: The AIUR-15-390K's higher current rating provides additional thermal margin and reduces saturation risk in applications operating near the original component's rated current. This is a beneficial characteristic for substitution.

Q: How does the DC resistance increase from 33 mOhm to 38 mOhm affect circuit performance?

A: The 5 mOhm increase results in approximately 15% higher resistive losses at rated current. In applications where power dissipation is critical, recalculate thermal performance. For most general-purpose filtering and energy storage applications, this variance is within acceptable engineering tolerance.

Q: Are both components physically compatible with existing PCB footprints?

A: Both components use radial, vertical cylinder, 3-lead through-hole packages. Physical dimensions differ slightly (ELC-15E390L: 0.630" diameter × 0.906" height; AIUR-15-390K: 0.709" diameter × 0.787" height). Verify PCB hole spacing and clearance before substitution.

Q: What is the impact of the unshielded design on EMI performance?

A: Unshielded inductors exhibit increased magnetic field radiation compared to shielded designs. In sensitive analog circuits or applications with strict EMI requirements, evaluate coupling effects to nearby signal traces. Shielded designs are preferred for noise-critical applications.

Q: Do both components meet current environmental and compliance standards?

A: Yes, both the ELC-15E390L and AIUR-15-390K are ROHS3 compliant. The AIUR-15-390K includes REACH Unaffected status, confirming compliance with additional European chemical regulations.