ELC-09D4R7DF Equivalent & Substitute Parts

Part Overview

The ELC-09D4R7DF is a 4.7 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 3 A continuous current with 18mOhm DC resistance. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part is mounted through-hole in a radial, vertical cylinder package and complies with ROHS3 standards.

Substiute Parts

ELC-09D4R7DF

Panasonic Electronic ComponentsIn Stock: 814ELC-09D4R7DF Datasheet

Current PartRFQ

744772047

Würth ElektronikIn Stock: 1025744772047 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELC-09D4R7DF is determined by the following core parameters:

• Inductance Value: 4.7 µH (±20% tolerance acceptable)
• DC Resistance: 18mOhm maximum
• Current Rating: Minimum 3 A (higher ratings acceptable)
• Mounting Configuration: Through-hole, radial vertical cylinder package
• Shielding: Unshielded
• Compliance: ROHS3 compliant

The substitute part 744772047 (Würth Elektronik WE-TI series) meets all substitution criteria. It maintains identical inductance and DC resistance specifications, exceeds the current rating requirement (4 A vs. 3 A), and preserves the through-hole radial vertical cylinder form factor. Both parts are ROHS3 compliant and suitable for direct functional replacement in applications where the ELC-09D4R7DF is specified.

Parameter Comparison

Engineering Selection Recommendations

The 744772047 (Würth Elektronik WE-TI series) is the qualified substitute for the obsolete ELC-09D4R7DF. Selection is based on the following factors:

• Compliance: Both parts maintain ROHS3 certification, ensuring regulatory continuity.
• Product Status: The substitute is active and in production, providing long-term availability and supply chain stability compared to the obsolete Panasonic part.
• Electrical Equivalence: Inductance, tolerance, and DC resistance specifications are identical. The higher current rating (4 A vs. 3 A) provides additional design margin without compromising performance in applications rated for 3 A operation.
• Mechanical Compatibility: Both parts use identical through-hole radial vertical cylinder packaging, enabling direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 744772047 be used as a direct replacement for the ELC-09D4R7DF?

A: Yes. Both parts share identical inductance (4.7 µH), tolerance (±20%), DC resistance (18mOhm), and through-hole radial vertical cylinder package configuration. The substitute's higher current rating (4 A) does not affect compatibility in circuits designed for 3 A operation.

Q: What is the primary reason for substitution?

A: The ELC-09D4R7DF is classified as obsolete. The 744772047 is an active product with confirmed availability, ensuring procurement continuity and long-term supply chain reliability.

Q: Are there any dimensional differences between these parts?

A: Minor dimensional variations exist. The ELC-09D4R7DF measures 0.374" diameter (9.50mm) with 0.350" seated height (8.90mm). The 744772047 measures 0.307" diameter (7.80mm) with 0.394" seated height (10.00mm). Both fit standard through-hole radial vertical cylinder footprints, though PCB layout verification is recommended for space-constrained applications.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the ELC-09D4R7DF and 744772047 are ROHS3 compliant. The substitute additionally carries REACH Unaffected status.

Q: What is the inductance frequency test condition for each part?

A: The ELC-09D4R7DF inductance is specified at 10 kHz. The 744772047 inductance is specified at 1 kHz. Both measurements fall within standard industry test frequencies and do not affect functional equivalence at typical operating frequencies.