ELF-20N040A Equivalent & Substitute Parts

Part Overview

The ELF-20N040A is a 2-line common mode choke (CMC) manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 4A current handling capability. This component features a typical DC resistance of 33mOhm and is housed in a vertical 4-pin package with dimensions of 20.00mm × 32.00mm × 30.00mm (max height).

The ELF-20N040A is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

ELF-20N040A

Panasonic Electronic ComponentsIn Stock: 886ELF-20N040A Datasheet

Current PartRFQ

SS30V-400021

KEMETIn Stock: 1047SS30V-400021 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELF-20N040A is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration
• Current Rating (Max): Must support minimum 4A
• Mounting Type: Must be through-hole
• Package / Case: Must be vertical, 4-pin configuration
• DC Resistance (DCR): Should not exceed 33mOhm (Typ) to maintain equivalent performance characteristics

The substitute part SS30V-400021 (KEMET) meets these core electrical and mechanical requirements, making it a valid equivalent for applications where the ELF-20N040A is no longer available.

Parameter Comparison

Engineering Selection Recommendations

The SS30V-400021 serves as an active substitute for the obsolete ELF-20N040A based on the following factors:

Electrical Compatibility: Both components maintain 2-line configuration and 4A current rating. The SS30V-400021 exhibits higher DC resistance (70mOhm vs. 33mOhm), which represents a 2.1× increase in resistive loss. This difference must be evaluated against thermal and efficiency requirements of the target application.

Mechanical Compatibility: Both components use through-hole mounting with vertical 4-pin packages. Dimensional differences exist: the SS30V-400021 is slightly larger in length (31.00mm vs. 20.00mm) and height (33.00mm vs. 30.00mm), while narrower in width (22.50mm vs. 32.00mm). PCB layout verification is required to confirm fit within existing mounting footprints.

Compliance Status: The SS30V-400021 is ROHS3 compliant and currently in active production, providing supply chain continuity. The ELF-20N040A is RoHS non-compliant and obsolete. Selection of the KEMET substitute aligns with modern regulatory requirements.

Operational Specifications: The SS30V-400021 provides defined AC voltage rating (250V) and operating temperature range (-25°C ~ 120°C), whereas the ELF-20N040A specifications do not include these parameters.

Frequently Asked Questions (FAQ)

Q: Can the SS30V-400021 directly replace the ELF-20N040A without circuit modifications?

A: The SS30V-400021 meets the core electrical requirements (2-line, 4A rating, through-hole, 4-pin vertical package). However, the higher DC resistance (70mOhm vs. 33mOhm) will increase power dissipation. Circuit performance must be validated, particularly in applications sensitive to insertion loss or thermal constraints.

Q: What are the dimensional compatibility considerations?

A: The SS30V-400021 has different footprint dimensions than the ELF-20N040A. Length increases from 20.00mm to 31.00mm, height from 30.00mm to 33.00mm, and width decreases from 32.00mm to 22.50mm. PCB layout must be verified to confirm the substitute fits within the available mounting space.

Q: Does the SS30V-400021 meet current regulatory compliance standards?

A: Yes. The SS30V-400021 is ROHS3 compliant, whereas the ELF-20N040A is RoHS non-compliant. For applications subject to RoHS regulations, the KEMET substitute is the appropriate choice.

Q: Are there any inductance specifications provided for comparison?

A: The ELF-20N040A inductance value is not specified in the available data. The SS30V-400021 is rated at 2.1 mH @ 1 kHz. Inductance matching should be confirmed based on application requirements.

Q: What is the packaging difference between these components?

A: The ELF-20N040A is supplied in bulk packaging. The SS30V-400021 is also supplied in bulk packaging. Both use vertical, 4-pin through-hole packages suitable for standard PCB assembly processes.