ELF-19N004A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-19N004A is a 2-line common mode choke manufactured by Panasonic Electronic Components, rated for 400mA maximum current with a typical DC resistance of 2.72Ohm. This through-hole component is designed for electromagnetic interference (EMI) filtering applications in power line circuits. The part is currently classified as obsolete, making identification of functionally equivalent substitutes necessary for ongoing system support and new design implementations where legacy compatibility is required.

Substiute Parts

ELF-19N004A

Panasonic Electronic ComponentsIn Stock: 1167ELF-19N004A Datasheet

Current PartRFQ

B82732R2401B030

EPCOS - TDK ElectronicsIn Stock: 857B82732R2401B030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-19N004A is determined by the following critical parameters that must remain consistent or compatible:

Primary Matching Criteria:

• Number of Lines: 2 (mandatory match)
• Current Rating (Max): 400mA (mandatory match)
• Mounting Type: Through Hole (mandatory match)
• Package / Case: Vertical, 4 PC Pin (mandatory match)

Secondary Compatibility Criteria:

• DC Resistance (DCR): Typical value 2.72Ohm to 3Ohm acceptable range
• Physical dimensions: Footprint compatibility within through-hole PCB layout constraints
• Voltage Rating: AC voltage rating of 250V or higher supports standard power line applications

The substitute part B82732R2401B030 from EPCOS - TDK Electronics meets all primary matching criteria and operates within acceptable secondary parameter ranges, making it a direct functional equivalent for the obsolete ELF-19N004A.

Parameter Comparison

Engineering Selection Recommendations

The B82732R2401B030 is the qualified substitute for the obsolete ELF-19N004A based on the following engineering factors:

Functional Equivalence: Both components maintain identical electrical specifications for the critical parameters: 2-line configuration, 400mA current rating, through-hole mounting, and vertical 4-pin package orientation. The DC resistance variance of 0.28Ohm (2.72Ohm to 3Ohm) is within acceptable tolerance for common mode choke applications.

Product Status & Availability: The B82732R2401B030 carries Active product status with documented inventory availability (799 Pcs), ensuring long-term supply chain reliability compared to the obsolete ELF-19N004A.

Compliance & Certifications: The B82732R2401B030 holds ENEC, UR, and VDE approvals with ROHS3 compliance and REACH affected status, meeting modern regulatory requirements for power line filtering applications.

Physical Integration: While dimensional differences exist (footprint and height), the substitute maintains vertical through-hole pin configuration compatible with standard PCB layouts designed for 4-pin common mode chokes. PCB layout verification is required to confirm clearance compatibility.

Frequently Asked Questions (FAQ)

Q: Can the B82732R2401B030 directly replace the ELF-19N004A without PCB modifications?

A: The B82732R2401B030 maintains identical pin configuration (Vertical, 4 PC Pin) and mounting type (Through Hole), allowing direct pin-to-pin substitution. However, physical dimensions differ: the substitute is larger in length (24.00mm vs 18.00mm) and narrower in width (16.50mm vs 27.50mm), with reduced height (24.60mm vs 27.50mm). PCB layout verification is necessary to confirm component clearance and trace routing compatibility.

Q: What is the significance of the DC resistance difference between the two parts?

A: The ELF-19N004A specifies 2.72Ohm typical DCR while the B82732R2401B030 specifies 3Ohm typical DCR. This 0.28Ohm difference represents approximately 10% variance and is acceptable for common mode choke applications where DCR tolerance bands typically accommodate such variations. Circuit performance impact is minimal in standard power line filtering configurations.

Q: Are there compliance or certification differences between the original and substitute?

A: The ELF-19N004A approval agency information is not specified in available documentation. The B82732R2401B030 holds ENEC, UR, and VDE certifications with ROHS3 compliance, meeting current regulatory standards for power line components. This represents an upgrade in documented compliance for modern applications.

Q: What is the inductance specification for the B82732R2401B030?

A: The B82732R2401B030 is specified at 100 mH @ 10 kHz. The ELF-19N004A inductance value is not provided in the available technical parameters. Inductance verification against circuit design requirements is necessary to confirm functional compatibility.

Q: How do the operating temperature ranges compare?

A: The ELF-19N004A operating temperature range is not specified. The B82732R2401B030 operates across -40°C ~ 125°C, providing documented thermal performance suitable for industrial and commercial power line applications. Temperature range verification against system requirements is recommended.