ELC-09D820DF Equivalent & Substitute Parts

Part Overview

The ELC-09D820DF is a 82 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 900 mA continuous current with 160 mOhm DC resistance. This through-hole radial component operates at 10 kHz test frequency and is packaged in a vertical cylinder configuration with 0.374" diameter and 0.350" maximum seated height.

The ELC-09D820DF 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 legacy systems utilizing this component.

Substiute Parts

ELC-09D820DF

Panasonic Electronic ComponentsIn Stock: 1025ELC-09D820DF Datasheet

Current PartRFQ

744772820

Würth ElektronikIn Stock: 1261744772820 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELC-09D820DF is determined by the following critical parameters:

• Inductance Value: 82 µH ±10% tolerance
• Current Rating: Minimum 900 mA continuous current capability
• DC Resistance: 160 mOhm maximum
• Mounting Type: Through hole configuration
• Package / Case: Radial, vertical cylinder form factor
• Shielding: Unshielded construction
• Regulatory Compliance: ROHS3 compliant

The substitute part 744772820 (Würth Elektronik WE-TI series) meets all critical electrical and mechanical parameters. This part provides equivalent inductance, matching DC resistance specification, and exceeds the current rating requirement with 1.45 A capability. Both components share identical through-hole radial mounting and unshielded construction, ensuring mechanical and electrical compatibility within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

The 744772820 (Würth Elektronik WE-TI series) is an active product with current manufacturing status, providing supply chain continuity for the obsolete ELC-09D820DF. Both components maintain ROHS3 compliance and meet the electrical specifications defined by the original design.

The substitute part delivers superior current handling capability (1.45 A versus 900 mA), providing design margin for thermal and electrical stress. DC resistance matches the original specification at 160 mOhm maximum, ensuring equivalent power dissipation characteristics.

Physical dimensions differ slightly: the Würth part features a smaller diameter (0.307" versus 0.374") but greater height (0.394" versus 0.350"). PCB layout verification is required to confirm mechanical fit within the original mounting footprint. The substitute's drum core ferrite construction with specified saturation current (1.9 A) provides defined performance boundaries absent in the original part specification.

Frequently Asked Questions (FAQ)

Q: Can the 744772820 directly replace the ELC-09D820DF in existing designs?

A: Electrical substitution is valid based on matching inductance (82 µH ±10%), DC resistance (160 mOhm), and current rating (1.45 A exceeds 900 mA requirement). Mechanical fit requires verification due to dimensional differences: the substitute is narrower (0.307" versus 0.374" diameter) but taller (0.394" versus 0.350" height). PCB layout and enclosure clearance must be confirmed before implementation.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Inductance value and tolerance, DC resistance, current rating, and shielding configuration are the primary electrical criteria. The ELC-09D820DF and 744772820 match on all four parameters. Inductance frequency test conditions differ (10 kHz versus 1 kHz), but both operate within the ±10% tolerance band at their respective test frequencies.

Q: Are both parts RoHS compliant?

A: Yes. Both the ELC-09D820DF and 744772820 are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the significance of the saturation current specification on the substitute part?

A: The 744772820 specifies saturation current (Isat) at 1.9 A, defining the current level at which inductance begins to degrade. The original ELC-09D820DF does not provide this specification. The substitute's saturation margin (1.9 A versus 1.45 A rated current) ensures stable inductance performance within the design operating envelope.

Q: How do the core materials differ between these parts?

A: The ELC-09D820DF core material is not specified in the available data. The 744772820 uses ferrite drum core construction, a standard material for wirewound inductors providing stable inductance across temperature and frequency ranges. This construction supports the specified self-resonant frequency of 6.1 MHz.