ELC-3FN2R7N Equivalent & Substitute Parts

Part Overview

The ELC-3FN2R7N is a 2.7 µH unshielded surface mount inductor manufactured by Panasonic Electronic Components, rated for 950 mA with 150mOhm 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 specified inductance value, current rating capability, and surface mount form factor while meeting or exceeding the electrical performance parameters of the original design.

Substiute Parts

ELC-3FN2R7N

Panasonic Electronic ComponentsIn Stock: 1053ELC-3FN2R7N Datasheet

Current PartRFQ

SDR0302-2R7ML

Bourns Inc.In Stock: 1212SDR0302-2R7ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELC-3FN2R7N is determined by the following critical parameters:

Inductance Value: 2.7 µH nominal. Substitute parts must deliver this inductance within acceptable tolerance ranges for the application circuit.

Current Rating: Minimum 950 mA. Substitute parts must support the design current without saturation or thermal degradation.

DC Resistance: Maximum 150mOhm. Substitute parts with lower DCR improve efficiency; higher DCR values may introduce unacceptable power loss.

Mounting Configuration: Surface mount technology with compatible footprint dimensions (3.20 x 3.20 mm maximum lateral dimensions, 1.20 mm maximum height).

Environmental Compliance: RoHS compliance and MSL rating of 1 or better ensure compatibility with modern manufacturing and storage requirements.

The SDR0302-2R7ML from Bourns Inc. meets these substitution criteria through equivalent inductance, superior current rating (1.5 A), lower DC resistance (100mOhm max), and compatible surface mount packaging.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The SDR0302-2R7ML is the qualified substitute for the obsolete ELC-3FN2R7N. Both components are RoHS compliant with MSL rating 1, ensuring compatibility with current manufacturing processes and storage protocols.

Performance Advantages: The Bourns SDR0302-2R7ML provides measurable improvements over the original specification: 58% higher current rating (1.5 A vs. 950 mA) and 33% lower DC resistance (100mOhm max vs. 150mOhm). These characteristics reduce thermal stress and improve circuit efficiency.

Physical Considerations: The Bourns part is physically smaller in lateral dimensions (3.00 x 2.80 mm vs. 3.20 x 3.20 mm) but taller (2.80 mm vs. 1.20 mm seated height). PCB layout verification is required to confirm vertical clearance compatibility with adjacent components or enclosure constraints.

Product Status: The Bourns SDR0302-2R7ML maintains active product status with established supply chain availability, providing long-term design support compared to the obsolete Panasonic part.

Frequently Asked Questions (FAQ)

Q: Can the SDR0302-2R7ML be used as a direct drop-in replacement for the ELC-3FN2R7N?

A: The SDR0302-2R7ML is electrically compatible and functionally equivalent. However, the increased seated height (2.80 mm vs. 1.20 mm) requires verification of PCB clearance and component spacing. Footprint dimensions are compatible for standard surface mount assembly.

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

A: Lower DC resistance (100mOhm max vs. 150mOhm) reduces resistive power loss in the inductor coil. This improves circuit efficiency and reduces thermal generation, particularly beneficial in high-current or continuous-duty applications.

Q: Does the tighter inductance tolerance of the SDR0302-2R7ML affect circuit performance?

A: The Bourns part offers ±20% tolerance compared to ±30% for the Panasonic part. Tighter tolerance improves circuit predictability and may reduce design margin requirements, but both parts meet the 2.7 µH specification for standard applications.

Q: Are there any compliance or certification differences between these parts?

A: Both parts are RoHS compliant with MSL rating 1. The Bourns part carries ROHS3 certification, representing the latest regulatory standard. Both are suitable for modern manufacturing and storage environments.

Q: What should be verified before implementing the substitution?

A: Confirm PCB clearance for the increased height (2.80 mm), verify that the higher current rating (1.5 A) does not introduce unintended circuit behavior, and validate that the lower DC resistance aligns with thermal and efficiency requirements.