ELC-09D390DF Equivalent & Substitute Parts

Part Overview

The ELC-09D390DF is a 39 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 1.3 A with 87mOhm DC resistance. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support, maintenance, and production continuity. Substitute parts must maintain the same inductance value, voltage rating capability, and through-hole radial mounting configuration while meeting current industrial compliance standards.

Substiute Parts

ELC-09D390DF

Panasonic Electronic ComponentsIn Stock: 919ELC-09D390DF Datasheet

Current PartRFQ

RL622-390K-RC

Bourns Inc.In Stock: 1844RL622-390K-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELC-09D390DF are identified based on strict electrical and mechanical parameter alignment:

Inductance Value: Substitute must be 39 µH ±10% to maintain circuit performance within design specifications.

Current Rating: Substitute current rating must equal or exceed 1.3 A. The RL622-390K-RC provides 1.5 A, exceeding the minimum requirement.

DC Resistance: Substitute DCR must not significantly exceed 87mOhm to prevent excessive power dissipation. The RL622-390K-RC specifies 100mOhm maximum, representing acceptable variance within typical circuit design margins.

Shielding Configuration: Both parts are unshielded, maintaining identical EMI and coupling characteristics.

Mounting and Package: Both parts feature through-hole radial vertical cylinder configuration, ensuring direct PCB footprint compatibility.

Tolerance: Both parts maintain ±10% inductance tolerance, preserving circuit design specifications.

Compliance: Both parts are ROHS3 compliant, meeting current regulatory requirements for the ELC-09D390DF obsolete status transition.

Parameter Comparison

Engineering Selection Recommendations

The RL622-390K-RC from Bourns Inc. is a qualified substitute for the obsolete ELC-09D390DF based on the following engineering criteria:

Electrical Equivalence: Both inductors maintain 39 µH inductance with ±10% tolerance. The RL622-390K-RC current rating of 1.5 A exceeds the ELC-09D390DF requirement of 1.3 A, providing design margin. DC resistance variance (87mOhm to 100mOhm maximum) falls within acceptable limits for typical circuit applications.

Mechanical Compatibility: Both components feature identical through-hole radial vertical cylinder mounting, ensuring direct PCB footprint compatibility. Physical dimension differences (diameter 9.50mm vs. 8.50mm; height 8.90mm vs. 11.00mm) require verification against specific PCB layout constraints and clearance requirements.

Regulatory Compliance: Both parts are ROHS3 compliant, meeting current environmental and hazardous substance restrictions. The RL622-390K-RC is in active production status, ensuring long-term supply availability and design support continuity.

Production Continuity: Selection of the RL622-390K-RC eliminates obsolescence risk associated with the ELC-09D390DF while maintaining electrical and mechanical circuit performance.

Frequently Asked Questions (FAQ)

Q: Can the RL622-390K-RC be used as a direct replacement for the ELC-09D390DF without circuit modification?

A: The RL622-390K-RC is electrically equivalent for the specified inductance, current rating, and DC resistance parameters. Physical dimension differences require verification against PCB layout constraints. No circuit modification is necessary if PCB clearance and height requirements are satisfied.

Q: What is the significance of the 13mOhm difference in DC resistance between the two inductors?

A: The ELC-09D390DF specifies 87mOhm while the RL622-390K-RC specifies 100mOhm maximum. This 13mOhm variance represents approximately 15% increase in DC resistance. For applications sensitive to power dissipation, calculate the impact using the formula P = I²R. At 1.3 A, the difference is approximately 22mW, which is typically acceptable in standard circuit applications.

Q: Are there physical footprint compatibility concerns?

A: The RL622-390K-RC has a smaller diameter (8.50mm vs. 9.50mm) but greater height (11.00mm vs. 8.90mm). Verify that the PCB layout accommodates the increased height and that the smaller diameter does not create mechanical instability in the mounting holes.

Q: Why is the RL622-390K-RC preferred over the ELC-09D390DF?

A: The ELC-09D390DF is classified as obsolete, creating supply chain risk. The RL622-390K-RC is in active production, ensuring availability, consistent quality, and manufacturer support. Electrical and mechanical parameters are equivalent within acceptable engineering tolerances.

Q: What compliance certifications apply to both inductors?

A: Both the ELC-09D390DF and RL622-390K-RC are ROHS3 compliant. The RL622-390K-RC additionally carries REACH Unaffected status, confirming compliance with European chemical safety regulations.