ELC-18E103L Equivalent & Substitute Parts

Part Overview

The ELC-18E103L is a 10 mH shielded drum core wirewound inductor manufactured by Panasonic Electronic Components, rated for 330 mA with a DC resistance of 2.7 Ohm. This component features a radial, vertical cylinder package suitable for through-hole mounting applications. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity.

Substiute Parts

ELC-18E103L

Panasonic Electronic ComponentsIn Stock: 977ELC-18E103L Datasheet

Current PartRFQ

7447231103

Würth ElektronikIn Stock: 11717447231103 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELC-18E103L is determined by the following critical parameters:

• Inductance Value: 10 mH (primary functional requirement)
• Mounting Type: Through Hole (mechanical compatibility)
• Package Configuration: Radial, Vertical Cylinder (form factor and PCB footprint)
• Current Rating: Minimum 330 mA (electrical performance requirement)
• DC Resistance: Lower values preferred to minimize power dissipation
• Regulatory Compliance: ROHS3 Compliant status

The substitute part 7447231103 (Würth Elektronik WE-TI series) matches the inductance value, mounting type, and package configuration. However, it presents trade-offs in current rating and DC resistance that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The 7447231103 (Würth Elektronik) serves as an active substitute for the obsolete ELC-18E103L. Both components maintain ROHS3 compliance and share identical inductance specifications at the 10 kHz test frequency.

Selection of the substitute requires evaluation of application-specific constraints:

• Current Margin: The substitute's 250 mA rating is 24% lower than the original 330 mA specification. Applications operating near the original current limit require verification that the substitute's saturation current of 320 mA provides adequate margin.
• DC Resistance Impact: The substitute exhibits 3.15× higher DC resistance (8.5 Ohm vs. 2.7 Ohm), resulting in increased power dissipation. Thermal analysis is necessary for power-sensitive applications.
• Shielding Difference: The substitute is unshielded, whereas the original is shielded. EMI-sensitive circuit designs must account for this electromagnetic characteristic change.
• Inductance Tolerance: The substitute offers tighter tolerance (±5% vs. ±10%), providing improved consistency for precision applications.

Both components are ROHS3 compliant and suitable for through-hole PCB assembly. The substitute is currently in active production status, ensuring long-term availability.

Frequently Asked Questions (FAQ)

Q: Can the 7447231103 directly replace the ELC-18E103L in all applications?

A: Direct replacement is possible only when application current requirements do not exceed 250 mA and increased DC resistance (8.5 Ohm vs. 2.7 Ohm) does not compromise circuit performance. The unshielded design of the substitute may introduce EMI considerations absent in the original shielded component.

Q: What is the impact of the higher DC resistance in the substitute?

A: Higher DC resistance increases power dissipation according to P = I²R. At 250 mA, the substitute dissipates 531 mW compared to 169 mW for the original at 330 mA. Thermal management and circuit efficiency must be reassessed.

Q: Are both components mechanically compatible?

A: Both components use through-hole radial, vertical cylinder packages. The substitute specifies 4 leads versus the original's unspecified lead count. PCB footprint verification is required before assembly.

Q: What is the significance of the tighter tolerance in the substitute?

A: The substitute's ±5% inductance tolerance versus the original's ±10% provides improved consistency. This benefits applications requiring precise inductance values but does not affect substitution feasibility in tolerance-flexible designs.

Q: How does the absence of shielding affect circuit performance?

A: Unshielded inductors exhibit greater magnetic field radiation. In circuits sensitive to electromagnetic interference or in proximity to sensitive analog circuits, the shielded original may be preferable. Application-specific EMI analysis determines whether the unshielded substitute is acceptable.

Q: Is the substitute available for production quantities?

A: The substitute (7447231103) is classified as active product status with 1156 pieces in stock, ensuring availability for production requirements. The original ELC-18E103L is obsolete.