ELC-09D3R3DF Equivalent & Substitute Parts

Part Overview

The ELC-09D3R3DF is a 3.3 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 3.2 A continuous current with 15mOhm DC resistance. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs.

Substiute Parts

ELC-09D3R3DF

Panasonic Electronic ComponentsIn Stock: 917ELC-09D3R3DF Datasheet

Current PartRFQ

RLB0912-3R3ML

Bourns Inc.In Stock: 13083RLB0912-3R3ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELC-09D3R3DF is determined by the following critical parameters:

• Inductance Value: 3.3 µH (fixed specification)
• Tolerance: ±20% (defines acceptable inductance range)
• Current Rating: Minimum 3.2 A (substitute must meet or exceed)
• DC Resistance: Maximum 15mOhm (substitute must not exceed)
• Mounting Type: Through Hole (mechanical compatibility)
• Package / Case: Radial, Vertical Cylinder (form factor requirement)
• Shielding: Unshielded (electromagnetic characteristic)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

The RLB0912-3R3ML from Bourns Inc. qualifies as a direct substitute based on matching inductance, tolerance, mounting type, package configuration, and regulatory compliance, while providing superior current rating and saturation characteristics.

Parameter Comparison

Engineering Selection Recommendations

The RLB0912-3R3ML is the qualified substitute for the ELC-09D3R3DF based on the following criteria:

• Regulatory Compliance: Both components maintain ROHS3 compliance, ensuring continued adherence to environmental standards.
• Product Status: The substitute is active and in production, providing long-term availability and supply chain stability compared to the obsolete original part.
• Electrical Specifications: The substitute meets all critical electrical parameters within acceptable tolerances. The increased current rating (4.5 A vs. 3.2 A) and saturation current (6.5 A) provide design margin without compromising performance.
• Physical Compatibility: Identical mounting type and package configuration ensure direct mechanical substitution in existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the RLB0912-3R3ML be used as a direct replacement for the ELC-09D3R3DF?

A: Yes. Both components share identical inductance values, tolerances, mounting types, and package configurations. The substitute meets all electrical requirements of the original part while providing superior current handling capability.

Q: What is the impact of the 3mOhm increase in DC resistance?

A: The RLB0912-3R3ML has a maximum DCR of 18mOhm compared to the ELC-09D3R3DF at 15mOhm. This 3mOhm difference results in minimal power dissipation increase and is within acceptable engineering margins for most applications.

Q: Are there any physical dimension differences between these parts?

A: Both components use radial, vertical cylinder packaging. The RLB0912-3R3ML has a slightly larger diameter (0.343" vs. 0.374") and height (0.433" vs. 0.350"). PCB layout verification is required to confirm fit within existing component placement constraints.

Q: What is the advantage of the higher current rating on the substitute?

A: The RLB0912-3R3ML is rated for 4.5 A continuous current with a saturation current of 6.5 A, compared to the original part's 3.2 A rating. This provides additional design margin and reduces thermal stress in the component during operation.

Q: Are both parts RoHS compliant?

A: Yes. Both the ELC-09D3R3DF and RLB0912-3R3ML are ROHS3 compliant, meeting current environmental and regulatory requirements.