ELC-09D331F Equivalent & Substitute Parts

Part Overview

The ELC-09D331F is a 330 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 490 mA continuous current with 650mOhm DC resistance. This through-hole radial component operates at 10 kHz test frequency and is packaged in a vertical cylinder configuration with 9.50mm diameter and 8.90mm seated height.

The ELC-09D331F is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this inductor specification.

Substiute Parts

ELC-09D331F

Panasonic Electronic ComponentsIn Stock: 793ELC-09D331F Datasheet

Current PartRFQ

744772331

Würth ElektronikIn Stock: 1935744772331 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELC-09D331F is determined by strict equivalence across the following critical parameters:

• Inductance Value: 330 µH (±10% tolerance maintained)
• Current Rating: Minimum 490 mA continuous current capability
• DC Resistance: Maximum 650mOhm (lower values acceptable for reduced power dissipation)
• Mounting Configuration: Through-hole radial, vertical cylinder package
• Shielding Classification: Unshielded construction
• Regulatory Compliance: ROHS3 compliant, MSL 1 rating

The Würth Elektronik 744772331 meets these substitution criteria with equivalent inductance, higher current rating (510 mA), comparable DC resistance (700mOhm maximum), identical mounting type, and matching regulatory certifications.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 744772331 is a qualified substitute for the obsolete ELC-09D331F based on the following engineering criteria:

Electrical Equivalence: Both components maintain 330 µH inductance with ±10% tolerance. The substitute provides 510 mA current rating, exceeding the original 490 mA specification, ensuring adequate margin for the intended application. DC resistance of 700mOhm maximum is within acceptable tolerance relative to the original 650mOhm specification.

Mechanical Compatibility: Both inductors feature through-hole radial vertical cylinder mounting. Physical dimensions differ slightly (substitute is smaller in diameter at 7.80mm versus 9.50mm, but taller at 10.00mm versus 8.90mm). PCB layout verification is required to confirm fit within the original mounting footprint.

Regulatory Compliance: Both components are ROHS3 compliant with MSL 1 rating, meeting environmental and moisture sensitivity requirements.

Product Availability: The substitute is active production status with 1900 pieces in stock, providing reliable supply continuity compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the 744772331 be used as a direct replacement for the ELC-09D331F?

A: Electrical substitution is valid based on inductance, tolerance, current rating, and DC resistance specifications. Physical dimensions differ; PCB layout must be verified to confirm mechanical fit within the original mounting area.

Q: What is the significance of the different inductance test frequencies (10 kHz vs. 1 kHz)?

A: Test frequency indicates the measurement condition for inductance value. Both components are specified at their respective test frequencies and maintain the same 330 µH nominal inductance value. The difference reflects manufacturer measurement methodology and does not affect functional equivalence in typical circuit applications.

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

A: Both components are ROHS3 compliant with MSL 1 rating. The substitute includes additional REACH Unaffected status. No compliance barriers exist for substitution.

Q: What should be considered regarding the DC resistance difference (650mOhm vs. 700mOhm)?

A: The 50mOhm difference represents approximately 7.7% increase in DC resistance. For applications sensitive to power dissipation or voltage drop, this variance should be evaluated against circuit requirements. In most general-purpose filtering and energy storage applications, this difference is negligible.

Q: How do the physical dimension differences affect PCB design?

A: The substitute is smaller in diameter (7.80mm vs. 9.50mm) but taller (10.00mm vs. 8.90mm). Verify that the original PCB footprint accommodates the substitute's height and that the radial lead spacing matches the design. Component placement density and clearance to adjacent components must be confirmed.