ELF-24V025A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-24V025A is a 2-line common mode choke (CMC) manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 2.5A current handling capability. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support, design updates, and procurement continuity. The part features a typical DC resistance of 124mOhm and is packaged in a vertical 4-pin configuration with compact dimensions of 37.00mm × 24.00mm.

Substiute Parts

ELF-24V025A

Panasonic Electronic ComponentsIn Stock: 937ELF-24V025A Datasheet

Current PartRFQ

B82734R2262B030

EPCOS - TDK ElectronicsIn Stock: 2310B82734R2262B030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-24V025A is determined by the following critical parameters that must be maintained or exceeded:

Primary Substitution Criteria:

• Number of Lines: 2 (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Configuration: Vertical, 4 PC Pin (exact match required)
• Current Rating: Minimum 2.5A (equal or greater)
• DC Resistance: Maximum 130mOhm (equal or lower preferred for thermal performance)

Secondary Compatibility Factors:

• Physical dimensions must accommodate existing PCB layouts
• Electrical performance characteristics must support the intended application

The substitute part B82734R2262B030 from EPCOS - TDK Electronics meets all primary substitution criteria with a current rating of 2.6A and DC resistance of 130mOhm (Typ), providing functional equivalence within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

The B82734R2262B030 is the qualified substitute for the obsolete ELF-24V025A based on the following engineering factors:

Product Status Alignment: The substitute part maintains active product status with EPCOS - TDK Electronics, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Electrical Performance: The substitute meets or exceeds all critical electrical parameters. The current rating of 2.6A exceeds the 2.5A requirement, and the DC resistance of 130mOhm (Typ) remains within acceptable thermal performance margins relative to the original 124mOhm specification.

Mechanical Compatibility: Both parts share identical mounting type (through hole) and package configuration (vertical, 4 PC pin), enabling direct PCB layout compatibility with minimal or no redesign requirements.

Compliance and Certifications: The substitute part carries ENEC, UR, and VDE approvals, along with ROHS3 compliance and REACH compliance status, meeting modern regulatory requirements that may exceed the original part's certification profile.

Physical Dimensions: The substitute part features reduced footprint dimensions (32.50mm × 21.00mm versus 37.00mm × 24.00mm) and lower profile height (31.00mm versus 42.50mm), providing potential benefits for space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the B82734R2262B030 be used as a direct replacement for the ELF-24V025A?

A: Yes. Both parts are 2-line common mode chokes with through-hole vertical 4-pin package configuration. The substitute meets or exceeds all critical electrical parameters (current rating and DC resistance) required for functional equivalence.

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

A: The primary differences are manufacturer (Panasonic versus EPCOS - TDK), product status (obsolete versus active), and physical dimensions. The substitute is smaller and lighter, with additional voltage and temperature specifications. DC resistance is slightly higher (130mOhm versus 124mOhm Typ), a difference of approximately 5%.

Q: Will the smaller dimensions of the substitute part affect PCB layout?

A: The reduced footprint of the B82734R2262B030 (32.50mm × 21.00mm versus 37.00mm × 24.00mm) and lower height (31.00mm versus 42.50mm) provide layout advantages. Existing PCB designs accommodating the larger original part will have adequate clearance for the substitute without modification.

Q: Are there any compliance or certification differences?

A: The substitute part carries ENEC, UR, and VDE approvals with ROHS3 and REACH compliance status. The original part's certification profile is not fully specified in available documentation. The substitute's enhanced certification status supports compliance with current regulatory requirements.

Q: What is the inductance specification of the substitute part?

A: The B82734R2262B030 is specified at 10 mH @ 10 kHz. The original ELF-24V025A inductance value is not provided in available documentation.

Q: How do the DC resistance values compare in practical application?

A: The substitute's DC resistance of 130mOhm (Typ) versus the original's 124mOhm (Typ) represents a 5% increase. This minor difference has negligible impact on thermal performance in typical power line filtering applications and remains within acceptable engineering tolerances for common mode choke substitution.