ELF-19N008A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-19N008A is a 2-line common mode choke manufactured by Panasonic Electronic Components, rated for 800mA maximum current with a typical DC resistance of 670mOhm. This through-hole component is designed for power line filtering applications. The part is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

ELF-19N008A

Panasonic Electronic ComponentsIn Stock: 739ELF-19N008A Datasheet

Current PartRFQ

SS21V-R070260

KEMETIn Stock: 1331SS21V-R070260 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ELF-19N008A is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration for common mode filtering
• Mounting Type: Through-hole mounting required for PCB compatibility
• Package Configuration: Vertical, 4-pin package for mechanical fit
• Current Rating: Minimum 700mA to accommodate the original 800mA specification
• DC Resistance: Maximum 1.1Ohm acceptable for power line applications
• Electrical Compatibility: AC voltage rating and operating temperature range support power line filtering use case

The KEMET SS21V-R070260 meets these substitution criteria as an active, currently available alternative with compatible electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SS21V-R070260 is the qualified substitute for the obsolete ELF-19N008A based on the following factors:

Product Status: The SS21V-R070260 maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete ELF-19N008A.

Compliance & Certifications: The KEMET substitute carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic components in power line applications.

Electrical Compatibility: Both components share identical 2-line configuration and through-hole mounting architecture. The SS21V-R070260 current rating of 700mA provides adequate margin for most applications originally designed for 800mA, with the trade-off of slightly higher DC resistance (1.1Ohm vs. 670mOhm typical).

Mechanical Fit: Vertical 4-pin package configuration is identical. Dimensional differences (20.50mm x 16.50mm vs. 18.00mm x 27.50mm) require PCB layout verification for space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can the SS21V-R070260 directly replace the ELF-19N008A without PCB modifications?

A: The SS21V-R070260 uses the same vertical 4-pin through-hole package configuration. However, dimensional differences require verification of available PCB footprint space. The substitute is 2.50mm shorter but 4.60mm wider than the original part.

Q: What is the impact of the 100mA current rating reduction (800mA to 700mA)?

A: The SS21V-R070260 is rated for 700mA maximum current. Applications operating at or near 800mA require thermal and current load analysis to confirm the substitute operates within safe margins.

Q: How does the higher DC resistance of the substitute affect circuit performance?

A: The SS21V-R070260 exhibits 1.1Ohm DC resistance compared to the ELF-19N008A's 670mOhm typical value. This 430mOhm increase results in higher power dissipation and voltage drop across the component. Circuit simulations are necessary for applications sensitive to insertion loss or thermal performance.

Q: Are there compliance differences between the two parts?

A: The SS21V-R070260 is ROHS3 compliant and REACH unaffected. The ELF-19N008A compliance status is not specified in available documentation. For applications requiring specific regulatory compliance, the KEMET substitute provides documented certification.

Q: What is the inductance specification of the substitute?

A: The SS21V-R070260 is specified at 26 mH @ 1 kHz. The ELF-19N008A inductance value is not provided in the available data. Inductance matching should be verified for frequency-dependent filtering applications.