ELC-3FN100M Equivalent & Substitute Parts

Part Overview

The ELC-3FN100M is a 10 µH unshielded surface mount inductor manufactured by Panasonic Electronic Components. Rated for 530 mA with a DC resistance of 430mOhm, this component is classified as obsolete. Due to its discontinued status, identifying functionally equivalent substitute parts is essential for ongoing design support, production continuity, and system maintenance.

Substiute Parts

ELC-3FN100M

Panasonic Electronic ComponentsIn Stock: 2511ELC-3FN100M Datasheet

Current PartRFQ

SDR0302-100ML

Bourns Inc.In Stock: 16229SDR0302-100ML Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELC-3FN100M is determined by the following critical parameters:

• Inductance Value: 10 µH (exact match required)
• Tolerance: ±20% (must be met or exceeded in precision)
• Current Rating: Minimum 530 mA (substitute must support or exceed this requirement)
• DC Resistance: Lower or equal values are acceptable (reduces power dissipation)
• Shielding: Unshielded (electrical characteristic match)
• Mounting Type: Surface Mount (physical compatibility)
• Package Footprint: Nonstandard case with dimensions 3.20mm x 3.20mm and height 1.20mm maximum

The SDR0302-100ML meets these substitution criteria with improved electrical performance characteristics while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The SDR0302-100ML is a direct functional substitute for the obsolete ELC-3FN100M based on the following engineering criteria:

• Inductance and Tolerance: Both parts specify 10 µH at ±20% tolerance, ensuring electrical equivalence in circuit operation.
• Current Capacity: The SDR0302-100ML is rated for 800 mA, exceeding the ELC-3FN100M requirement of 530 mA, providing design margin and improved reliability.
• DC Resistance: The substitute offers 250mOhm maximum resistance compared to 430mOhm, resulting in lower power dissipation and improved thermal performance.
• Compliance: Both parts are RoHS compliant and carry MSL 1 rating, meeting environmental and handling requirements.
• Product Status: The SDR0302-100ML is actively manufactured by Bourns Inc., ensuring long-term availability and supply chain continuity.
• Physical Compatibility: Both parts are surface mount with nonstandard packages. The substitute footprint (3.00mm x 2.80mm) is compatible with the original (3.20mm x 3.20mm) PCB layout. However, the increased height (2.80mm vs. 1.20mm) requires verification of vertical clearance in the assembly.

Frequently Asked Questions (FAQ)

Q: Can the SDR0302-100ML directly replace the ELC-3FN100M without circuit modification?

A: Yes, from an electrical standpoint. Both parts have identical inductance (10 µH) and tolerance (±20%). The substitute's superior current rating (800 mA vs. 530 mA) and lower DC resistance (250mOhm vs. 430mOhm) provide improved performance margins. Physical PCB layout compatibility must be confirmed, particularly regarding the increased component height.

Q: What are the key differences between these two inductors?

A: The primary differences are manufacturer (Panasonic vs. Bourns), product status (obsolete vs. active), and electrical performance. The SDR0302-100ML provides higher current capacity and lower resistance, making it a superior choice for new designs. The substitute is slightly smaller in footprint but taller in height.

Q: Are there any compliance or certification concerns with substitution?

A: No. Both parts are RoHS compliant and carry identical MSL 1 ratings. The SDR0302-100ML meets or exceeds all regulatory requirements of the original part.

Q: What should be verified before implementing this substitute in production?

A: Confirm PCB layout compatibility, particularly the increased component height (2.80mm vs. 1.20mm). Verify that vertical clearance exists for the taller substitute part. Electrical performance will be equivalent or improved due to lower DC resistance.

Q: Is the SDR0302-100ML available in the same packaging format?

A: Both parts use nonstandard surface mount packages. The SDR0302-100ML is supplied in Tape & Reel (TR) format, while the ELC-3FN100M was supplied in Cut Tape (CT) & Digi-Reel format. Confirm packaging compatibility with your procurement and assembly processes.