ELC-09D391DF Equivalent & Substitute Parts

Part Overview

The ELC-09D391DF is a 390 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 460 mA with 860mOhm DC resistance. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part is mounted through-hole in a radial, vertical cylinder configuration and complies with ROHS3 standards.

Substiute Parts

ELC-09D391DF

Panasonic Electronic ComponentsIn Stock: 925ELC-09D391DF Datasheet

Current PartRFQ

RL622-391K-RC

Bourns Inc.In Stock: 1158RL622-391K-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ELC-09D391DF is determined by the following critical parameters:

• Inductance Value: 390 µH (±10% tolerance acceptable)
• Current Rating: Minimum 460 mA required
• DC Resistance: Must not exceed application limits; substitute DCR values are evaluated for circuit performance impact
• Mounting Type: Through Hole required
• Package Configuration: Radial, Vertical Cylinder required
• Shielding: Unshielded specification maintained
• Compliance: ROHS3 compliance required

The RL622-391K-RC from Bourns Inc. meets these substitution criteria with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The RL622-391K-RC is a direct functional substitute for the ELC-09D391DF based on the following factors:

• Inductance Match: Both parts provide 390 µH with ±10% tolerance, ensuring equivalent circuit performance
• Current Capacity: The RL622-391K-RC exceeds the minimum 460 mA requirement with a 480 mA rating, providing operational margin
• Compliance: Both parts are ROHS3 compliant, meeting regulatory requirements
• Product Availability: The RL622-391K-RC is active production status, ensuring long-term supply availability compared to the obsolete ELC-09D391DF
• Mechanical Compatibility: Both parts use through-hole radial, vertical cylinder mounting, compatible with existing PCB layouts

The primary design consideration is the increased DC resistance of the RL622-391K-RC (1Ohm Max versus 860mOhm), which may result in slightly higher power dissipation in the inductor. Circuit analysis is required to confirm acceptable thermal performance in the application.

Frequently Asked Questions (FAQ)

Q: Can the RL622-391K-RC directly replace the ELC-09D391DF without PCB modification?

A: The RL622-391K-RC uses the same through-hole radial, vertical cylinder mounting configuration. However, dimensional differences exist: the RL622-391K-RC has a smaller diameter (0.335" vs 0.374") but greater height (0.433" vs 0.350"). PCB layout verification is required to confirm clearance compatibility.

Q: What is the impact of the higher DC resistance in the RL622-391K-RC?

A: The RL622-391K-RC has a maximum DC resistance of 1Ohm compared to 860mOhm in the ELC-09D391DF. This 140mOhm increase results in higher resistive losses. Power dissipation impact depends on circuit current levels and duty cycle. Circuit thermal analysis is necessary to confirm acceptable performance.

Q: Are both parts suitable for the same operating temperature range?

A: The ELC-09D391DF does not specify an operating temperature range in the provided data. The RL622-391K-RC operates from -55°C to 105°C. Application temperature requirements must be evaluated against the RL622-391K-RC specification.

Q: Why is the ELC-09D391DF classified as obsolete?

A: Obsolete status indicates the part is no longer in active production. The RL622-391K-RC, with active production status, ensures continued availability for new designs and production continuity.

Q: Are there any compliance differences between the two parts?

A: Both parts are ROHS3 compliant. The RL622-391K-RC includes additional REACH Unaffected status documentation. Both parts carry EAR99 ECCN classification.