ELC-3FN330M Equivalent & Substitute Parts

Part Overview

The ELC-3FN330M is a 33 µH unshielded surface mount inductor manufactured by Panasonic Electronic Components, rated for 260 mA with a DC resistance of 1.9 Ohm. This 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 an MSL rating of 1 (Unlimited).

Substiute Parts

ELC-3FN330M

Panasonic Electronic ComponentsIn Stock: 1202ELC-3FN330M Datasheet

Current PartRFQ

SDR0302-330KL

Bourns Inc.In Stock: 4807SDR0302-330KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELC-3FN330M is determined by the following critical parameters:

• Inductance Value: 33 µH (primary electrical requirement)
• Current Rating: Minimum 260 mA (operational current capacity)
• DC Resistance: Must accommodate the 1.9 Ohm baseline for circuit performance
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Shielding Configuration: Unshielded (electromagnetic environment compatibility)
• Package Compliance: RoHS and MSL ratings for manufacturing and storage requirements

The SDR0302-330KL meets these substitution criteria with equivalent inductance, higher current rating capability, and compatible surface mount packaging. Both parts are unshielded inductors with RoHS compliance and MSL-1 ratings.

Parameter Comparison

Engineering Selection Recommendations

The SDR0302-330KL is a direct functional substitute for the obsolete ELC-3FN330M based on the following criteria:

• Both components provide 33 µH inductance with unshielded configuration
• The SDR0302-330KL exceeds the current rating requirement (420 mA vs. 260 mA), providing operational margin
• The SDR0302-330KL features lower DC resistance (850 mOhm vs. 1.9 Ohm), reducing power dissipation
• Both parts maintain RoHS compliance and MSL-1 ratings for manufacturing compatibility
• The SDR0302-330KL is actively manufactured, ensuring long-term availability and supply chain continuity

Physical dimensions differ slightly; the SDR0302-330KL is smaller in footprint (3.00mm x 2.80mm) but taller (2.80mm vs. 1.20mm). PCB layout verification is required to confirm height clearance in the target application.

Frequently Asked Questions (FAQ)

Q: Can the SDR0302-330KL directly replace the ELC-3FN330M without circuit modification?

A: The SDR0302-330KL meets all critical electrical parameters (inductance, current rating, DC resistance) and mounting requirements. Physical height difference (2.80mm vs. 1.20mm) requires PCB layout verification to confirm clearance compatibility.

Q: What is the impact of the lower DC resistance in the SDR0302-330KL?

A: Lower DC resistance (850 mOhm vs. 1.9 Ohm) reduces resistive losses and heat generation in the inductor. This is a performance improvement for the application and does not create compatibility issues.

Q: Are there packaging differences between these parts?

A: The ELC-3FN330M is supplied in standard packaging, while the SDR0302-330KL is supplied in Tape & Reel (TR) format. Both maintain MSL-1 ratings. Reel format is standard for high-volume surface mount assembly.

Q: Does the tighter inductance tolerance of the SDR0302-330KL affect compatibility?

A: The SDR0302-330KL tolerance (±10%) is tighter than the ELC-3FN330M (±20%), providing improved consistency. This does not create compatibility issues and may improve circuit performance predictability.

Q: What is the significance of the higher current saturation rating in the SDR0302-330KL?

A: The SDR0302-330KL saturation current of 500 mA exceeds the operating current requirement of 260 mA, ensuring the inductor remains in the linear region under normal operating conditions.