ELF-19N025A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-19N025A is a 2-line common mode choke manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 2.5A current handling capability. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system support and new design implementations. The part features a typical DC resistance of 80mOhm and vertical 4-pin configuration suitable for power line filtering applications.

Substiute Parts

ELF-19N025A

Panasonic Electronic ComponentsIn Stock: 777ELF-19N025A Datasheet

Current PartRFQ

SS21V-R200036

KEMETIn Stock: 758SS21V-R200036 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-19N025A is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration for common mode filtering function
• Mounting Type: Through-hole mounting required for PCB compatibility
• Package Configuration: Vertical 4-pin configuration for footprint compatibility
• Current Rating: Minimum 2.0A to 2.5A range to handle specified load
• DC Resistance: Maximum 150mOhm acceptable range to maintain filtering performance
• Physical Dimensions: Footprint compatibility within vertical through-hole envelope

The substitute part SS21V-R200036 from KEMET meets these substitution criteria as an active product with equivalent electrical and mechanical characteristics suitable for direct replacement in applications previously using the ELF-19N025A.

Parameter Comparison

Engineering Selection Recommendations

The SS21V-R200036 is the primary substitute for the obsolete ELF-19N025A based on the following factors:

• Product Status: SS21V-R200036 is an active product with ongoing manufacturer support and availability, whereas ELF-19N025A is obsolete
• Compliance: SS21V-R200036 is ROHS3 compliant, meeting current regulatory requirements for new designs and manufacturing
• Electrical Compatibility: Both components feature 2-line configuration with through-hole mounting and vertical 4-pin package, ensuring functional equivalence in common mode choke applications
• Current Handling: SS21V-R200036 rated at 2A operates within acceptable range for applications designed for 2.5A, with margin dependent on specific circuit requirements
• Physical Footprint: Dimensional differences exist; PCB layout verification is necessary to confirm mechanical fit within existing board designs

Frequently Asked Questions (FAQ)

Q: Can SS21V-R200036 directly replace ELF-19N025A in existing designs?

A: Both components share identical 2-line configuration, through-hole mounting, and vertical 4-pin package. Physical dimensions differ slightly; verify PCB footprint compatibility before implementation. Current rating of 2A versus 2.5A requires circuit analysis to confirm adequacy for specific application loads.

Q: What are the key differences between these two parts?

A: Primary differences include current rating (2.5A vs 2A), DC resistance (80mOhm vs 150mOhm), physical dimensions, and product status (obsolete vs active). SS21V-R200036 provides ROHS3 compliance and specified operating temperature range, whereas ELF-19N025A specifications are limited.

Q: Is the higher DC resistance of SS21V-R200036 a concern?

A: DC resistance of 150mOhm versus 80mOhm represents increased power dissipation. Circuit thermal analysis is required to determine if this difference impacts system performance or thermal management in the target application.

Q: Are there packaging or inventory considerations?

A: SS21V-R200036 is available in bulk packaging with active inventory status, ensuring supply chain continuity. ELF-19N025A is obsolete with limited remaining stock; transition to active substitute is recommended for long-term product support.

Q: What compliance certifications apply to the substitute part?

A: SS21V-R200036 is ROHS3 compliant and REACH unaffected. ELF-19N025A is RoHS non-compliant. New designs should utilize the compliant substitute to meet current regulatory requirements.