ELC-09D222DF Equivalent & Substitute Parts

Part Overview

The ELC-09D222DF is a 2.2 mH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 170 mA with a DC resistance of 4.4 Ohm. This through-hole radial component is designed for general-purpose inductive filtering and energy storage applications. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Identifying compatible alternatives ensures design continuity while maintaining electrical performance within acceptable tolerances.

Substiute Parts

ELC-09D222DF

Panasonic Electronic ComponentsIn Stock: 1056ELC-09D222DF Datasheet

Current PartRFQ

744731222

Würth ElektronikIn Stock: 1912744731222 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELC-09D222DF is evaluated based on the following critical parameters:

Electrical Compatibility:

• Inductance value of 2.2 mH with ±10% tolerance
• Current rating of 170 mA or higher
• DC resistance within acceptable range (4.4 Ohm reference)

Physical Compatibility:

• Through-hole mounting type
• Radial, vertical cylinder package configuration
• Dimensional compatibility with existing PCB footprints

Compliance & Status:

• RoHS3 compliance maintained
• Active product status preferred for long-term availability

The substitute part 744731222 (Würth Elektronik WE-TIS series) meets these criteria with equivalent inductance, higher current rating (200 mA), comparable DC resistance (4.6 Ohm max), and active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 744731222 (Würth Elektronik WE-TIS)

This part is the recommended equivalent for ELC-09D222DF replacement based on the following factors:

• Electrical Performance: Identical inductance (2.2 mH) and tolerance (±10%) ensure circuit functionality. The higher current rating (200 mA vs. 170 mA) provides design margin without performance degradation.

• Physical Compatibility: Matching through-hole radial vertical cylinder configuration allows direct PCB footprint compatibility.

• Compliance & Availability: Active product status ensures long-term supply chain reliability. Both parts maintain RoHS3 compliance, meeting regulatory requirements.

• Enhanced Characteristics: The shielded drum core design of the substitute provides improved electromagnetic interference performance compared to the unshielded original, offering a functional advantage in noise-sensitive applications.

• Thermal Considerations: The minimal DC resistance difference (4.6 Ohm max vs. 4.4 Ohm) results in negligible additional power dissipation and does not require thermal design modifications.

Frequently Asked Questions (FAQ)

Q: Can 744731222 be used as a direct replacement for ELC-09D222DF?

A: Yes. Both parts share identical inductance (2.2 mH), tolerance (±10%), mounting type (through-hole), and package configuration (radial vertical cylinder). The substitute meets or exceeds all critical electrical parameters.

Q: What is the difference between shielded and unshielded inductors in this application?

A: The ELC-09D222DF is unshielded, while 744731222 is shielded with a ferrite drum core. Shielding reduces electromagnetic field radiation and improves immunity to external interference. For most applications, the shielded substitute provides equal or superior performance.

Q: Does the higher current rating of 744731222 (200 mA vs. 170 mA) affect circuit operation?

A: No. A higher current rating indicates the substitute can safely handle greater current without saturation. In circuits designed for 170 mA operation, the substitute operates within its safe range with additional margin.

Q: Are there dimensional differences between these parts?

A: Yes. The ELC-09D222DF measures 0.374" diameter × 0.350" height, while 744731222 measures 0.307" diameter × 0.295" height. Both use radial through-hole mounting and fit standard inductor footprints, though the smaller substitute may provide additional PCB layout flexibility.

Q: What is the significance of the DC resistance difference (4.4 Ohm vs. 4.6 Ohm)?

A: The 0.2 Ohm difference represents approximately 4.5% variation. At the rated 170 mA current, this results in less than 0.034 mW additional power dissipation, which is negligible for most applications and does not require circuit redesign.

Q: Are both parts RoHS compliant?

A: Yes. Both ELC-09D222DF and 744731222 are RoHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: Why is the original part obsolete?

A: Product obsolescence occurs when manufacturers discontinue production due to market demand shifts, technology evolution, or supply chain consolidation. The availability of equivalent active alternatives ensures design continuity without functional compromise.