ELC-09D331DF Equivalent & Substitute Parts

Part Overview

The ELC-09D331DF 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-09D331DF carries obsolete product status. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring 330 µH inductance in through-hole radial mounting configurations.

Substiute Parts

ELC-09D331DF

Panasonic Electronic ComponentsIn Stock: 1031ELC-09D331DF Datasheet

Current PartRFQ

744772331

Würth ElektronikIn Stock: 1935744772331 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELC-09D331DF must satisfy the following core electrical and mechanical criteria:

Electrical Requirements:

• Inductance value: 330 µH (±10% tolerance)
• Current rating: minimum 490 mA
• DC resistance: maximum 650mOhm (lower values acceptable)
• Unshielded configuration
• Through-hole mounting

Mechanical Requirements:

• Radial, vertical cylinder package orientation
• Physical dimensions compatible with 9.50mm diameter footprint
• RoHS3 compliance

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

Parameter Comparison

Engineering Selection Recommendations

The 744772331 from Würth Elektronik qualifies as a functional substitute for the obsolete ELC-09D331DF based on matching electrical specifications and through-hole radial package configuration. Both components are ROHS3 compliant with MSL 1 rating, ensuring regulatory and environmental compatibility.

The Würth Elektronik part offers active product status with current manufacturing availability, addressing supply continuity concerns associated with the Panasonic obsolete component. The 510 mA current rating exceeds the original 490 mA specification, providing operational margin. DC resistance increases from 650mOhm to 700mOhm maximum, a 7.7% variance within acceptable engineering tolerance for inductor applications.

Physical dimensions differ slightly: the Würth part features a smaller diameter (7.80mm vs. 9.50mm) but greater height (10.00mm vs. 8.90mm). PCB layout verification is required to confirm footprint compatibility in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 744772331 directly replace the ELC-09D331DF in existing designs?

A: Electrical substitution is valid based on matching 330 µH inductance, ±10% tolerance, and current rating exceeding 490 mA. Mechanical compatibility requires verification of PCB layout dimensions, as the Würth part has smaller diameter (7.80mm) but greater height (10.00mm) compared to the original 9.50mm diameter and 8.90mm height.

Q: What is the significance of the DC resistance difference (650mOhm vs. 700mOhm)?

A: The 50mOhm increase represents a 7.7% variance. For applications sensitive to resistive losses, thermal dissipation calculations should be updated. For most general-purpose filtering and energy storage applications, this difference is negligible.

Q: Are both components RoHS compliant?

A: Yes. Both the ELC-09D331DF and 744772331 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and regulatory requirements.

Q: Why is the Panasonic part listed as obsolete?

A: Obsolete status indicates discontinued manufacturing. The Würth Elektronik 744772331 maintains active product status with current inventory availability, making it the preferred selection for new designs and supply chain continuity.

Q: Does package orientation affect substitution?

A: Both components use radial, vertical cylinder through-hole mounting. The Würth part specifies "Open" configuration, indicating an open-ended drum core design. Verify that circuit board clearances and component placement accommodate the dimensional differences before implementation.