ELF-19N020A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-19N020A is a 2-line common mode choke manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 2A current handling capability. This component features a typical DC resistance of 130mOhm and is housed in a vertical 4-pin package with dimensions of 18.00mm × 27.50mm.

The ELF-19N020A is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing maintenance, repair, and new design requirements where this part is specified or functionally required.

Substiute Parts

ELF-19N020A

Panasonic Electronic ComponentsIn Stock: 691ELF-19N020A Datasheet

Current PartRFQ

SS21V-R150057

KEMETIn Stock: 770SS21V-R150057 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELF-19N020A is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration
• Mounting Type: Must be through-hole
• Package Configuration: Must be vertical, 4-pin package
• Current Rating: Substitute must support minimum 2A operation
• DC Resistance: Substitute DCR must not exceed application requirements

The identified substitute part SS21V-R150057 (KEMET) shares the core functional characteristics of a 2-line common mode choke in through-hole vertical 4-pin configuration. However, this substitute exhibits different electrical performance characteristics, including reduced maximum current rating (1.5A versus 2A) and increased DC resistance (300mOhm versus 130mOhm typical).

Parameter Comparison

Engineering Selection Recommendations

The SS21V-R150057 is an active product with ROHS3 compliance, providing regulatory advantage over the obsolete, non-compliant ELF-19N020A. The substitute maintains functional compatibility through identical 2-line configuration and through-hole vertical 4-pin package structure.

Selection of SS21V-R150057 requires verification that the reduced current rating (1.5A maximum versus 2A) and increased DC resistance (300mOhm versus 130mOhm) are acceptable within the application's electrical specifications. The substitute's smaller footprint (20.50mm × 16.50mm versus 18.00mm × 27.50mm) and lower profile (24.50mm versus 27.50mm) may provide layout advantages in space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can SS21V-R150057 directly replace ELF-19N020A in all applications?

A: Direct replacement requires verification of current and resistance specifications. The substitute supports maximum 1.5A operation and exhibits 300mOhm DC resistance compared to the original part's 2A rating and 130mOhm typical resistance. Applications operating at or near 2A maximum current or requiring lower DC resistance may not be suitable for this substitute without circuit redesign.

Q: Are the physical dimensions compatible?

A: Both parts use vertical 4-pin through-hole packages. The SS21V-R150057 has a smaller footprint (20.50mm × 16.50mm) and lower profile (24.50mm) compared to the ELF-19N020A (18.00mm × 27.50mm, 27.50mm height). PCB layout verification is required to confirm mechanical fit.

Q: What is the compliance difference between these parts?

A: The ELF-19N020A is RoHS non-compliant and obsolete. The SS21V-R150057 is ROHS3 compliant and active in production, providing regulatory compliance for new designs and ongoing supply availability.

Q: Are there electrical performance trade-offs?

A: Yes. The SS21V-R150057 provides specified AC voltage rating (250V) and operating temperature range (-25°C ~ 120°C), which are not specified for the ELF-19N020A. However, the substitute exhibits higher DC resistance and lower current capacity, which may impact power dissipation and thermal performance in high-current applications.