ELC-18B271L Equivalent & Substitute Parts

Part Overview

The ELC-18B271L is a 270 µH unshielded drum core wirewound inductor manufactured by Panasonic Electronic Components. This through-hole component is rated for 2.2 A continuous current with 110 mOhm DC resistance and operates at 10 kHz test frequency. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

ELC-18B271L

Panasonic Electronic ComponentsIn Stock: 949ELC-18B271L Datasheet

Current PartRFQ

AIUR-15-271K

Abracon LLCIn Stock: 1738AIUR-15-271K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELC-18B271L is determined by the following critical parameters:

• Inductance Value: 270 µH (±10% tolerance acceptable)
• Current Rating: Minimum 2.0 A (ELC-18B271L rated 2.2 A)
• DC Resistance: Maximum 190 mOhm (ELC-18B271L at 110 mOhm baseline)
• Core Material: Ferrite, unshielded drum core
• Mounting Configuration: Through-hole, radial vertical cylinder package
• Regulatory Compliance: ROHS3 compliant

The AIUR-15-271K from Abracon LLC meets these substitution criteria. While the current rating is reduced to 2.0 A and DCR is higher at 190 mOhm maximum, the inductance value, core type, mounting style, and regulatory compliance align with the original specification. The difference in test frequency (1 kHz vs. 10 kHz) reflects manufacturer characterization methodology and does not preclude functional equivalence at the specified inductance value.

Parameter Comparison

Engineering Selection Recommendations

The AIUR-15-271K is the qualified substitute for the ELC-18B271L based on the following factors:

Compliance & Regulatory Status: Both components are ROHS3 compliant with MSL 1 rating, ensuring compatibility with current manufacturing and environmental standards.

Product Lifecycle: The ELC-18B271L is obsolete, while the AIUR-15-271K maintains active production status, providing long-term availability and supply chain stability.

Electrical Equivalence: The inductance value and tolerance are identical. The current rating reduction from 2.2 A to 2.0 A requires circuit-level verification to confirm the application does not exceed 2.0 A continuous operation. The increased DCR (190 mOhm vs. 110 mOhm) introduces additional power dissipation and must be evaluated for thermal impact in the target circuit.

Physical Compatibility: Both components use identical mounting technology (through-hole, radial vertical cylinder) and core construction (ferrite, unshielded drum core), ensuring mechanical fit and electrical behavior consistency.

Frequently Asked Questions (FAQ)

Q: Can the AIUR-15-271K directly replace the ELC-18B271L in all applications?

A: Direct replacement is possible only if the circuit operates at or below 2.0 A continuous current. The ELC-18B271L is rated for 2.2 A; applications requiring the full 2.2 A rating require alternative solutions. Additionally, the increased DCR of the AIUR-15-271K may affect thermal performance in high-current or high-frequency applications.

Q: What is the impact of the higher DC resistance in the AIUR-15-271K?

A: The AIUR-15-271K has a maximum DCR of 190 mOhm compared to 110 mOhm in the ELC-18B271L. At 2.0 A, this results in approximately 0.76 W additional power dissipation (I²R loss). Circuit thermal design must accommodate this increase.

Q: Are the physical dimensions compatible?

A: Both components use radial, vertical cylinder (open) packages. The ELC-18B271L measures 0.787" diameter × 1.063" height, while the AIUR-15-271K measures 0.709" diameter × 0.787" height. The AIUR-15-271K is physically smaller and will fit in the same PCB footprint with clearance margin.

Q: What is the difference in test frequency between the two parts?

A: The ELC-18B271L is characterized at 10 kHz, while the AIUR-15-271K is characterized at 1 kHz. Both inductance values are specified as 270 µH at their respective test frequencies. This difference reflects manufacturer measurement methodology and does not indicate functional incompatibility at the specified inductance value.

Q: Are both components RoHS compliant?

A: Yes. Both the ELC-18B271L and AIUR-15-271K are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), meeting current environmental and manufacturing standards.