ELC-18B331L Equivalent & Substitute Parts

Part Overview

The ELC-18B331L is a 330 µH unshielded drum core wirewound inductor manufactured by Panasonic Electronic Components. This through-hole component is rated for 1.9 A continuous current with a DC resistance of 130 mOhm and operates at 10 kHz test frequency. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

ELC-18B331L

Panasonic Electronic ComponentsIn Stock: 989ELC-18B331L Datasheet

Current PartRFQ

AIUR-15-331K

Abracon LLCIn Stock: 1009AIUR-15-331K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELC-18B331L is determined by the following critical parameters:

• Inductance Value: 330 µH (±10% tolerance acceptable)
• Current Rating: Minimum 1.8 A (substitute must support circuit current demands)
• DC Resistance: Maximum 260 mOhm (higher resistance acceptable for thermal and efficiency considerations)
• Core Type: Ferrite, unshielded drum core
• Mounting Type: Through hole, radial vertical cylinder configuration
• Compliance: ROHS3 compliant, MSL 1

The AIUR-15-331K from Abracon LLC meets all substitution criteria. While the substitute exhibits slightly lower current rating (1.8 A vs. 1.9 A) and higher DC resistance (260 mOhm vs. 130 mOhm), these parameters remain within acceptable engineering tolerances for equivalent functional performance in most applications. The substitute maintains identical inductance value, core type, mounting configuration, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The AIUR-15-331K is a direct functional equivalent for the obsolete ELC-18B331L. Both components maintain ROHS3 compliance and MSL 1 ratings, ensuring regulatory and environmental compatibility. The substitute is currently in active production status, providing supply chain continuity and long-term availability.

Physical dimensions differ slightly: the AIUR-15-331K is smaller (0.709" diameter vs. 0.787", and 0.787" height vs. 1.063"). PCB layout and mechanical clearance must be verified before implementation. The reduced current rating (1.8 A vs. 1.9 A) and increased DC resistance (260 mOhm vs. 130 mOhm) are acceptable for applications operating below 1.8 A continuous current. Thermal dissipation characteristics will increase proportionally with the higher resistance value.

Frequently Asked Questions (FAQ)

Q: Can the AIUR-15-331K directly replace the ELC-18B331L without circuit modification?

A: The AIUR-15-331K provides electrical equivalence for inductance value and core characteristics. Physical dimensions are smaller, requiring PCB layout verification. Current rating is 1.8 A; applications must operate below this threshold. No circuit modifications are required if these constraints are satisfied.

Q: What is the impact of the higher DC resistance in the AIUR-15-331K?

A: The AIUR-15-331K exhibits 260 mOhm maximum resistance compared to 130 mOhm in the original part. This doubles the resistive loss, increasing heat dissipation proportionally. For low-current applications, this difference is negligible. High-current or thermally sensitive circuits require thermal analysis.

Q: Are both parts RoHS compliant?

A: Yes. Both the ELC-18B331L and AIUR-15-331K are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), ensuring compatibility with modern manufacturing and environmental standards.

Q: What are the key differences in physical dimensions?

A: The AIUR-15-331K is physically smaller: 0.709" diameter (vs. 0.787") and 0.787" height (vs. 1.063"). PCB footprint and mechanical clearance must be verified before substitution to ensure component fit within the available space.

Q: Is the AIUR-15-331K available for long-term supply?

A: Yes. The AIUR-15-331K is classified as active product status, ensuring ongoing availability and supply chain support, unlike the obsolete ELC-18B331L.