ELF-20N035A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-20N035A is a 2-line common mode choke (CMC) manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 4.6A current handling capability. This component features a typical DC resistance of 44mOhm and is housed in a vertical 4-pin package with dimensions of 20.00mm × 32.00mm × 30.00mm (max height).

The ELF-20N035A is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Substiute Parts

ELF-20N035A

Panasonic Electronic ComponentsIn Stock: 996ELF-20N035A Datasheet

Current PartRFQ

SS26V-300028

KEMETIn Stock: 1030SS26V-300028 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELF-20N035A 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 4.6A
• DC Resistance: Substitute DCR must not exceed 44mOhm (Typ) to maintain equivalent performance characteristics
• Physical Dimensions: Substitute footprint must be compatible with PCB layout constraints

The SS26V-300028 from KEMET meets the core functional requirements as a 2-line common mode choke with through-hole mounting in a vertical 4-pin configuration. However, parameter deviations exist and must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The SS26V-300028 is an active product from KEMET and represents the primary substitute option for the obsolete ELF-20N035A. Key considerations for selection:

Advantages of SS26V-300028:

• Active product status ensures ongoing availability and supply chain continuity
• ROHS3 compliance meets current environmental and regulatory requirements
• Specified AC voltage rating (250V) and operating temperature range (-25°C ~ 120°C) provide defined performance boundaries
• Vertical 4-pin through-hole package maintains PCB compatibility

Parameter Deviations Requiring Evaluation:

• Current rating reduced from 4.6A to 3A: Applications operating at or above 3A require thermal and current distribution analysis
• DC resistance increased from 44mOhm to 100mOhm: Results in higher power dissipation; thermal management must be reassessed
• Physical dimensions differ: Footprint change from 20.00mm × 32.00mm to 26.00mm × 20.50mm requires PCB layout verification

Selection of SS26V-300028 is appropriate for applications where the reduced current rating and increased DCR are acceptable within system design margins. Applications with tight thermal budgets or current requirements exceeding 3A require alternative evaluation or design modification.

Frequently Asked Questions (FAQ)

Q: Can SS26V-300028 directly replace ELF-20N035A without PCB modification?

A: Physical footprint dimensions differ. The SS26V-300028 measures 26.00mm × 20.50mm compared to the ELF-20N035A at 20.00mm × 32.00mm. PCB layout verification is required to confirm hole spacing and component placement compatibility.

Q: What is the impact of increased DC resistance on system performance?

A: The SS26V-300028 DCR of 100mOhm versus the ELF-20N035A DCR of 44mOhm results in approximately 2.27 times higher resistive losses. Power dissipation increases proportionally with current squared (P = I²R). Applications operating at 3A will experience measurably higher heat generation.

Q: Is the reduced current rating (3A vs 4.6A) a limiting factor?

A: The SS26V-300028 is rated for 3A maximum. Applications requiring sustained operation above 3A exceed the substitute's specification. Applications operating at or below 3A are within specification.

Q: Does RoHS compliance affect electrical performance?

A: RoHS3 compliance of the SS26V-300028 reflects manufacturing process changes but does not alter core electrical characteristics. Compliance status is a regulatory and procurement consideration, not a functional performance parameter.

Q: Are the through-hole pin configurations identical?

A: Both components feature vertical 4-pin through-hole packages. Pin spacing and hole diameter compatibility must be verified against PCB design files and component datasheets to confirm mechanical interchangeability.