ELF-21N030A Equivalent & Substitute Parts

Part Overview

The ELF-21N030A is a 2-line common mode choke (CMC) manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 3A current handling capability. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. Common mode chokes are critical filtering components in power line applications, providing electromagnetic interference (EMI) suppression across dual-line configurations.

Substiute Parts

ELF-21N030A

Panasonic Electronic ComponentsIn Stock: 929ELF-21N030A Datasheet

Current PartRFQ

SS26V-R300038

KEMETIn Stock: 1219SS26V-R300038 Datasheet

DirectRFQ

B82734R2322B030

EPCOS - TDK ElectronicsIn Stock: 1333B82734R2322B030 Datasheet

SimilarRFQ

EV35-5.0-02-3M6

Schaffner EMC Inc.In Stock: 1689EV35-5.0-02-3M6 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELF-21N030A are selected based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Number of Lines: Must be 2-line configuration
• Mounting Type: Must be through-hole
• Package / Case: Must be vertical, 4 PC pin configuration
• Current Rating (Max): Must meet or exceed 3A requirement
• DC Resistance (DCR): Lower or equivalent values acceptable

Substitute Classification:

Three active substitute parts meet these core requirements:

1. SS26V-R300038 (KEMET) - Direct functional equivalent with 3A rating and 100mOhm DCR
2. B82734R2322B030 (EPCOS - TDK Electronics) - Enhanced specification with 3.2A rating and 85mOhm DCR
3. EV35-5.0-02-3M6 (Schaffner EMC Inc.) - Higher current capacity at 5A with superior 33mOhm DCR

All three substitute parts maintain the 2-line through-hole vertical configuration with 4 PC pin package, ensuring mechanical and electrical compatibility with the original ELF-21N030A footprint and circuit interface.

Parameter Comparison

Engineering Selection Recommendations

SS26V-R300038 (KEMET) - Recommended for direct replacement in existing designs where the original ELF-21N030A specifications are strictly required. This part maintains identical current rating (3A) and provides ROHS3 compliance with active product status. The 100mOhm DCR is higher than the original specification but remains within acceptable operating parameters for most power line filtering applications.

B82734R2322B030 (EPCOS - TDK Electronics) - Suitable for applications requiring enhanced performance margins. This part offers 3.2A current capacity and lower DCR (85mOhm), reducing power dissipation. It includes additional regulatory approvals (ENEC, UR, VDE) and extended operating temperature range (-40°C ~ 125°C), making it appropriate for demanding industrial environments. ROHS3 compliance is confirmed.

EV35-5.0-02-3M6 (Schaffner EMC Inc.) - Applicable for designs requiring superior current handling (5A) and minimal DC resistance (33mOhm). This part is suitable for applications where thermal performance and current capacity are critical design factors. ROHS3 compliance is confirmed. Note the increased height (42.70mm) may require PCB layout verification.

All three substitute parts are active products with confirmed RoHS3 compliance, ensuring long-term availability and regulatory alignment for new designs.

Frequently Asked Questions (FAQ)

Q: Can SS26V-R300038 be used as a direct drop-in replacement for ELF-21N030A?

A: Yes. Both parts share identical 2-line through-hole configuration, 4 PC pin vertical package, and 3A current rating. Physical dimensions are comparable (height within 0.5mm). The higher DCR (100mOhm vs. 56mOhm) represents the primary electrical difference and is acceptable for standard power line filtering applications.

Q: What is the impact of higher DC Resistance in substitute parts?

A: DC Resistance directly affects power dissipation in the component. Higher DCR results in increased heat generation proportional to I²R losses. For 3A operation, the difference between 56mOhm and 100mOhm represents approximately 1.3W additional dissipation. Thermal design review is recommended for high-ambient-temperature applications.

Q: Are all substitute parts mechanically compatible with the original PCB footprint?

A: All substitute parts maintain the vertical 4 PC pin through-hole configuration. However, dimensional variations exist: SS26V-R300038 is slightly taller (30.50mm vs. 30.00mm), B82734R2322B030 is comparable (31.00mm), and EV35-5.0-02-3M6 is significantly taller (42.70mm). PCB layout clearance verification is necessary before implementation, particularly for the Schaffner part.

Q: Which substitute part offers the best thermal performance?

A: EV35-5.0-02-3M6 provides the lowest DC Resistance (33mOhm), resulting in minimal I²R losses and superior thermal performance. This part is optimal for applications where thermal management is a design constraint.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts carry ROHS3 compliance certification, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the difference between "Direct" and "Similar" substitute classifications?

A: SS26V-R300038 is classified as a direct equivalent due to matching current rating (3A) and core electrical specifications. B82734R2322B030 and EV35-5.0-02-3M6 are classified as similar substitutes because they exceed the original specifications (higher current ratings and/or lower DCR), making them suitable for enhanced-performance applications but not strict 1:1 replacements.