EXC-ELSA39 Ferrite Bead Axial 80 Ohm Equivalent & Substitute Parts

Part Overview

The EXC-ELSA39 is a single-line ferrite bead axial component manufactured by Panasonic Electronic Components, rated at 80 Ohms @ 100 MHz with a maximum current rating of 7A and 10mOhm DC resistance. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

EXC-ELSA39

Panasonic Electronic ComponentsIn Stock: 1199EXC-ELSA39 Datasheet

Current PartRFQ

28L0138-80R-10

Laird-Signal Integrity ProductsIn Stock: 9155028L0138-80R-10 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the EXC-ELSA39 is determined by the following critical parameters:

• Impedance @ Frequency: The substitute must operate within the same frequency band (100 MHz) with impedance tolerance suitable for the application circuit
• Number of Lines: Single-line configuration must be maintained
• Current Rating: The substitute must support the required current without exceeding thermal limits
• DC Resistance: Maximum DCR of 10mOhm ensures minimal signal loss and heat generation
• Package / Case and Mounting Type: Axial through-hole configuration must be preserved for PCB compatibility
• Physical Dimensions: Component size must fit within existing board layout constraints

The identified substitute, 28L0138-80R-10 from Laird-Signal Integrity Products, meets these core substitution criteria within acceptable engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

The 28L0138-80R-10 from Laird-Signal Integrity Products is an active, in-production alternative to the obsolete EXC-ELSA39. Key considerations for selection:

• Impedance Variance: The substitute exhibits 86 Ohms @ 100 MHz versus the original 80 Ohms, representing a 7.5% increase. This variance must be evaluated against circuit tolerance requirements.
• Current Rating Reduction: The substitute supports 5A maximum current compared to the original 7A rating. Applications requiring current levels above 5A cannot use this substitute without thermal analysis.
• Physical Dimensions: The substitute is physically smaller (0.138" Dia x 0.206" L versus 0.150" Dia x 0.366" L), which may provide layout advantages but requires verification of PCB hole spacing compatibility.
• Compliance Status: The substitute is ROHS3 compliant and carries active product status, ensuring long-term availability and regulatory alignment.
• DC Resistance: Both parts maintain identical 10mOhm maximum DC resistance, ensuring equivalent signal integrity performance.

Frequently Asked Questions (FAQ)

Q: Can the 28L0138-80R-10 be used as a direct drop-in replacement for the EXC-ELSA39?

A: Physical compatibility depends on PCB hole spacing and layout constraints. The substitute is smaller in overall dimension, which may require verification of axial lead hole positioning. Electrical compatibility requires confirmation that the 7.5% impedance increase and 5A current limit are acceptable for the application.

Q: What is the impedance tolerance between the original and substitute part?

A: The EXC-ELSA39 is rated at 80 Ohms @ 100 MHz, while the 28L0138-80R-10 is rated at 86 Ohms @ 100 MHz. This 6-Ohm difference represents approximately 7.5% variance and must be evaluated against circuit design specifications.

Q: Is the current rating difference significant?

A: The original part supports 7A maximum current, while the substitute supports 5A. If the application circuit requires current levels between 5A and 7A, the substitute cannot be used without additional thermal management or circuit redesign.

Q: Are there compliance or regulatory differences between these parts?

A: The substitute (28L0138-80R-10) is ROHS3 compliant with active product status. The original part (EXC-ELSA39) is obsolete. For new designs or regulatory compliance requirements, the substitute provides superior long-term support and environmental compliance.

Q: How do the physical dimensions affect PCB compatibility?

A: The substitute is smaller (0.138" Dia x 0.206" L) compared to the original (0.150" Dia x 0.366" L). While the smaller size may fit existing through-hole positions, lead diameter and spacing must be verified to ensure proper PCB hole alignment and solder joint integrity.