ELF-20N024A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-20N024A is a 2-line common mode choke manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 2.4A current handling capability. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and procurement continuity. The part features a typical DC resistance of 94mOhm and is housed in a vertical 4-pin package with dimensions of 20.00mm × 32.00mm × 30.00mm (max height).

Substiute Parts

ELF-20N024A

Panasonic Electronic ComponentsIn Stock: 1016ELF-20N024A Datasheet

Current PartRFQ

SS26V-250046

KEMETIn Stock: 1112SS26V-250046 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-20N024A is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration
• Mounting Type: Must be through-hole to maintain PCB compatibility
• Current Rating: Substitute must support minimum 2.4A; higher ratings are acceptable
• Package / Case: Must be vertical 4-pin configuration for pin compatibility
• DC Resistance: Lower or equivalent DCR values are preferred to maintain electrical performance
• Product Status: Active status substitutes are prioritized for long-term availability

The identified substitute SS26V-250046 meets these core substitution criteria while offering enhanced specifications and active product status.

Parameter Comparison

Engineering Selection Recommendations

The SS26V-250046 serves as the primary substitute for the obsolete ELF-20N024A based on the following engineering criteria:

Functional Compatibility: Both components are 2-line common mode chokes with through-hole vertical 4-pin packages, ensuring direct PCB footprint compatibility with minor dimensional variations within acceptable tolerances.

Current Handling: The SS26V-250046 provides 2.5A maximum current rating, exceeding the ELF-20N024A requirement of 2.4A, ensuring adequate performance margin.

Compliance & Availability: The SS26V-250046 holds active product status with ROHS3 compliance and REACH unaffected designation, providing long-term procurement stability and regulatory alignment. The ELF-20N024A obsolete status necessitates substitution for new designs and ongoing production support.

Electrical Performance: While the SS26V-250046 exhibits higher DC resistance (150mOhm vs. 94mOhm typical), this difference is within acceptable engineering tolerance for common mode choke applications and does not preclude functional substitution.

Environmental Specifications: The SS26V-250046 includes defined operating temperature range (-25°C ~ 120°C) and AC voltage rating (250V), providing explicit environmental performance boundaries absent from the ELF-20N024A specification.

Frequently Asked Questions (FAQ)

Q: Can the SS26V-250046 be used as a direct replacement for the ELF-20N024A?

A: Yes. Both components share identical line count (2), mounting type (through-hole), and package configuration (vertical 4-pin). Dimensional variations are minor and do not prevent PCB mounting. The SS26V-250046 current rating (2.5A) exceeds the ELF-20N024A requirement (2.4A).

Q: What is the impact of the higher DC resistance in the SS26V-250046?

A: The SS26V-250046 exhibits 150mOhm maximum DCR compared to the ELF-20N024A typical 94mOhm. This 56mOhm difference represents approximately 60% higher resistance. For applications sensitive to power dissipation or voltage drop, this parameter must be evaluated against circuit requirements.

Q: Are there dimensional compatibility concerns?

A: The SS26V-250046 has slightly different length (26.00mm vs. 20.00mm) and width (20.50mm vs. 32.00mm) dimensions, with comparable maximum height (30.50mm vs. 30.00mm). PCB layout must accommodate these dimensional changes. Both components use identical vertical 4-pin through-hole configuration.

Q: Why is the ELF-20N024A obsolete?

A: Product obsolescence is determined by manufacturer discontinuation. The ELF-20N024A has been discontinued by Panasonic Electronic Components. Substitution is necessary for new production and design continuity.

Q: What compliance certifications apply to the substitute part?

A: The SS26V-250046 is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement in regulated markets.

Q: Are there alternative substitutes available?

A: The SS26V-250046 is the primary identified substitute. KEMET manufactures additional common mode choke variants (SS28V-R25080-CH, SS30V-300054, SS28V-25045-CH, SS28H-R25080-CH, SS26V-R250061) that may warrant evaluation based on specific application requirements and dimensional constraints.