ELF-21V008A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-21V008A is a 2-line common mode choke (CMC) designed for through-hole mounting with an 800mA current rating and 707mOhm typical DC resistance. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part belongs to the Panasonic V series and is currently available in inventory (907 pcs new original stock).

Substiute Parts

ELF-21V008A

Panasonic Electronic ComponentsIn Stock: 925ELF-21V008A Datasheet

Current PartRFQ

B82724J2102N001

EPCOS - TDK ElectronicsIn Stock: 1658B82724J2102N001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-21V008A is determined by the following critical parameters:

• Number of Lines: Must remain 2-line configuration for functional equivalence
• Mounting Type: Through-hole mounting required for PCB compatibility
• Package Configuration: Vertical, 4 PC pin configuration for footprint compatibility
• Current Rating: Substitute must support minimum 800mA operation
• DC Resistance: Substitute DCR must be within acceptable range for circuit performance (reference: 707mOhm typical)

The B82724J2102N001 from EPCOS - TDK Electronics meets these core substitution criteria while offering enhanced specifications and active product status.

Parameter Comparison

Engineering Selection Recommendations

The B82724J2102N001 is a qualified substitute for the ELF-21V008A based on the following factors:

Functional Compatibility: Both parts maintain identical 2-line configuration, through-hole mounting, and vertical 4-pin package orientation, ensuring PCB footprint compatibility.

Performance Headroom: The substitute provides 1A current rating versus the original 800mA specification, offering 25% additional current capacity. DC resistance values are comparable (750mOhm vs. 707mOhm typical), maintaining circuit performance within acceptable parameters.

Product Status & Compliance: The B82724J2102N001 is an active product with ROHS3 compliance and international approvals (ENEC, UR, VDE), providing long-term supply assurance and regulatory alignment. The original ELF-21V008A is obsolete, making this substitute necessary for production continuity.

Dimensional Considerations: The substitute exhibits minor dimensional variations (length +0.090", width -0.099", height -0.091"). PCB layout verification is required to confirm clearance compatibility in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the B82724J2102N001 directly replace the ELF-21V008A without PCB modifications?

A: The substitute maintains identical mounting type (through-hole), package configuration (vertical, 4 PC pin), and functional line count (2-line CMC). However, dimensional differences require PCB layout verification to confirm adequate clearance, particularly in height-constrained designs.

Q: What are the key electrical differences between these parts?

A: The substitute provides higher current capacity (1A vs. 800mA) and includes specified AC voltage rating (250V) and operating temperature range (-40°C ~ 125°C). DC resistance values are comparable (750mOhm vs. 707mOhm typical), ensuring similar circuit performance.

Q: Why is the ELF-21V008A classified as obsolete?

A: Panasonic has discontinued this product line. The B82724J2102N001 from EPCOS - TDK Electronics represents an active alternative with equivalent functionality and enhanced specifications.

Q: Are there compliance or certification differences?

A: The substitute carries ROHS3 compliance and international approvals (ENEC, UR, VDE), whereas the original part specifications do not include these certifications. This makes the substitute suitable for applications requiring regulatory compliance documentation.

Q: What packaging format is the substitute available in?

A: The B82724J2102N001 is supplied in tray packaging, compared to the original part's unspecified packaging format. Confirm packaging requirements for your procurement and assembly processes.