ELF-24V012A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-24V012A is a 2-line common mode choke (CMC) manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 1.2A current handling capability. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The part features a typical DC resistance of 469mOhm and is packaged in a vertical 4-pin configuration with dimensions of 37.00mm × 24.00mm × 42.50mm (height).

Substiute Parts

ELF-24V012A

Panasonic Electronic ComponentsIn Stock: 794ELF-24V012A Datasheet

Current PartRFQ

B82734R2132B030

EPCOS - TDK ElectronicsIn Stock: 2856B82734R2132B030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-24V012A is determined by the following critical parameters:

• Functional Type: 2-line common mode choke for power line filtering
• Mounting Configuration: Through-hole vertical orientation with 4-pin package
• Current Handling: Minimum 1.2A rated capacity
• DC Resistance: Comparable DCR performance (469mOhm baseline)
• Physical Compatibility: Pin configuration and footprint alignment for through-hole PCB mounting

The B82734R2132B030 from EPCOS - TDK Electronics meets these substitution criteria with compatible electrical and mechanical specifications, while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The B82734R2132B030 serves as a direct functional substitute for the obsolete ELF-24V012A based on the following engineering criteria:

Product Status: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Compliance & Certifications: The B82734R2132B030 holds ROHS3 compliance and multiple international approvals (ENEC, UR, VDE), addressing regulatory requirements that may not have been applicable to the original ELF-24V012A design.

Electrical Performance: The substitute provides equivalent or superior current handling (1.3A vs. 1.2A) and operates within specified temperature and voltage ranges (-40°C to 125°C, 250V AC), supporting broader application requirements.

Physical Compatibility: Both parts feature identical 2-line through-hole vertical configurations with 4-pin packages. The substitute's reduced footprint (32.50mm × 21.00mm vs. 37.00mm × 24.00mm) and lower profile (31.00mm vs. 42.50mm) offer PCB layout advantages while maintaining pin compatibility.

DC Resistance Consideration: The substitute's DCR of 560mOhm (vs. 469mOhm) represents a 19% increase. This parameter must be evaluated against specific application requirements for power dissipation and filtering performance.

Frequently Asked Questions (FAQ)

Q: Can the B82734R2132B030 directly replace the ELF-24V012A in existing designs?

A: Yes, for through-hole PCB applications. Both parts share identical 2-line configurations and 4-pin vertical mounting packages. The substitute's smaller footprint and lower profile may require PCB layout verification to confirm clearance compatibility.

Q: What is the significance of the DCR difference between these parts?

A: The B82734R2132B030 exhibits 560mOhm typical DCR compared to 469mOhm for the ELF-24V012A. This 91mOhm increase affects power dissipation calculations. At 1.2A operation, the additional dissipation is approximately 0.67mW. Applications with strict thermal budgets should evaluate this parameter against system requirements.

Q: Why is RoHS compliance important for this substitution?

A: The ELF-24V012A is RoHS non-compliant, while the B82734R2132B030 meets ROHS3 standards. For new designs or systems subject to environmental regulations, the compliant substitute ensures regulatory alignment and future supply chain viability.

Q: Are there packaging differences between these parts?

A: The ELF-24V012A is supplied in standard packaging, while the B82734R2132B030 is packaged in trays. Both maintain identical through-hole pin configurations. Packaging format does not affect electrical or mechanical compatibility.

Q: What certifications does the substitute part hold?

A: The B82734R2132B030 carries ENEC, UR, and VDE approvals, supporting applications requiring international safety and performance certifications. The original ELF-24V012A does not specify equivalent certifications.

Q: Is the current rating increase from 1.2A to 1.3A significant?

A: The 0.1A increase provides additional design margin for applications operating near the original part's current limit. This enhancement supports more robust system operation without requiring circuit redesign.