ELC-3FN470M Equivalent & Substitute Parts

Part Overview

The ELC-3FN470M is a 47 µH unshielded inductor manufactured by Panasonic Electronic Components, rated for 230 mA with a DC resistance of 2.45Ohm. This surface mount component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part is RoHS compliant and carries MSL Level 1 rating, indicating no moisture sensitivity constraints during storage and handling.

Substiute Parts

ELC-3FN470M

Panasonic Electronic ComponentsIn Stock: 1017ELC-3FN470M Datasheet

Current PartRFQ

SDR0302-470KL

Bourns Inc.In Stock: 4542SDR0302-470KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELC-3FN470M is based on the following critical parameters:

• Inductance Value: 47 µH (primary electrical requirement)
• Current Rating: Minimum 230 mA (operational current capacity)
• DC Resistance: Acceptable range determined by circuit design tolerance
• Shielding Configuration: Unshielded (electromagnetic environment compatibility)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Physical Footprint: Nonstandard package requiring dimensional verification

The SDR0302-470KL from Bourns Inc. meets these substitution criteria with enhanced electrical performance characteristics and active product status, providing design continuity for applications previously using the obsolete ELC-3FN470M.

Parameter Comparison

Engineering Selection Recommendations

The SDR0302-470KL is a direct functional substitute for the ELC-3FN470M based on the following engineering criteria:

• Electrical Equivalence: Both parts deliver 47 µH inductance in unshielded surface mount configuration, meeting the core circuit requirement.
• Current Capacity: The Bourns part rated at 360 mA exceeds the 230 mA requirement of the original design, providing operational margin.
• Compliance Status: Both parts are RoHS compliant. The Bourns part carries ROHS3 certification, meeting current regulatory standards. Both maintain MSL Level 1 rating.
• Product Availability: The Bourns part holds active product status with 4443 units in stock, ensuring procurement continuity compared to the obsolete Panasonic part.
• Physical Considerations: The Bourns part is slightly smaller in footprint (3.00mm x 2.80mm vs. 3.20mm x 3.20mm) but taller (2.80mm vs. 1.20mm). PCB layout and component clearance must be verified before implementation.

Frequently Asked Questions (FAQ)

Q: Can the SDR0302-470KL directly replace the ELC-3FN470M without circuit modification?

A: The SDR0302-470KL meets the electrical specifications of the ELC-3FN470M (47 µH inductance, unshielded, surface mount). However, the increased height (2.80mm vs. 1.20mm) requires verification of PCB clearance and component placement constraints. No circuit modification is required if physical space permits.

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

A: The SDR0302-470KL has a maximum DC resistance of 1.27Ohm compared to 2.45Ohm in the Panasonic part. Lower DCR reduces resistive losses and heat generation in the inductor, which is beneficial for circuit efficiency. This does not prevent substitution; it represents an improvement in performance characteristics.

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

A: Both parts are RoHS compliant and carry MSL Level 1 rating. The Bourns part holds ROHS3 certification, which represents the current regulatory standard. Both parts are suitable for applications requiring RoHS compliance.

Q: Why is the inductance tolerance different between the two parts?

A: The ELC-3FN470M has ±20% tolerance while the SDR0302-470KL has ±10% tolerance. The Bourns part offers tighter tolerance control, which may improve circuit performance consistency. This difference does not prevent substitution; it represents enhanced precision in the substitute part.

Q: What should be verified before implementing this substitution?

A: Verify PCB layout clearance for the increased height of the Bourns part (2.80mm). Confirm that the slightly smaller footprint (3.00mm x 2.80mm) is compatible with existing PCB pad patterns. Validate that the lower DC resistance does not introduce unintended circuit behavior changes in your specific application.