ELF-15N003A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The Panasonic ELF-15N003A is a 2-line common mode choke (CMC) designed for through-hole mounting with a 300mA current rating and 3.154Ohm typical DC resistance. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Common mode chokes are essential filtering components in power line applications, providing noise suppression across two conductors while allowing differential signals to pass. The ELF-15N003A serves this function in legacy systems requiring through-hole mounting with vertical pin configuration.

Substiute Parts

ELF-15N003A

Panasonic Electronic ComponentsIn Stock: 795ELF-15N003A Datasheet

Current PartRFQ

B82722J2301N001

EPCOS - TDK ElectronicsIn Stock: 947B82722J2301N001 Datasheet

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SS11VL-03550

KEMETIn Stock: 2113SS11VL-03550 Datasheet

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SS11VL-04350

KEMETIn Stock: 866SS11VL-04350 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELF-15N003A is determined by the following mandatory parameters:

• Number of Lines: Must be 2 (common mode choke configuration)
• Mounting Type: Must be Through Hole (mechanical compatibility)
• Package / Case: Must be Vertical, 4 PC Pin (board layout compatibility)
• Current Rating (Max): Must be ≥ 300mA (functional requirement)

The following substitute parts meet these core criteria:

1. B82722J2301N001 (EPCOS - TDK Electronics) – Active product with enhanced specifications
2. SS11VL-03550 (KEMET) – Active product with comparable inductance
3. SS11VL-04350 (KEMET) – Active product with higher current rating

Parameter Comparison

Engineering Selection Recommendations

B82722J2301N001 is recommended as the primary substitute for new designs and ongoing procurement. This part is manufactured by EPCOS - TDK Electronics (active product status), meets ROHS3 compliance, and carries approvals from ENEC, UR, and VDE. The lower DC resistance (2.5Ohm vs. 3.154Ohm) provides improved efficiency. Physical dimensions are slightly larger (23.30mm L x 16.10mm W vs. 15.00mm L x 22.70mm W), requiring PCB layout verification. Operating temperature range extends to -40°C, supporting broader environmental applications.

SS11VL-04350 serves as an alternative for applications requiring higher current capacity (400mA vs. 300mA). This KEMET part maintains ROHS3 compliance and offers a more compact footprint (22.00mm L x 14.50mm W, 19.50mm height). The lower DC resistance (2.6Ohm) and 35 mH inductance @ 1 kHz provide distinct electrical characteristics suitable for specific filtering requirements.

SS11VL-03550 is suitable when inductance specification is a primary design criterion (55 mH @ 1 kHz). This KEMET part maintains the 300mA current rating and offers the most compact height (19.50mm), beneficial for space-constrained applications. ROHS3 compliance and REACH unaffected status support regulatory requirements.

All substitute parts require PCB layout verification due to dimensional variations from the original ELF-15N003A.

Frequently Asked Questions (FAQ)

Q: Can B82722J2301N001 be used as a direct drop-in replacement for ELF-15N003A?

A: B82722J2301N001 meets all core substitution criteria (2-line configuration, through-hole mounting, vertical 4-pin package, ≥300mA current rating). However, physical dimensions differ: B82722J2301N001 measures 23.30mm L x 16.10mm W x 25.40mm H versus ELF-15N003A at 15.00mm L x 22.70mm W x 22.50mm H. PCB layout verification is required before implementation.

Q: What are the key differences between the KEMET substitutes SS11VL-03550 and SS11VL-04350?

A: Both parts share identical physical dimensions (22.00mm L x 14.50mm W x 19.50mm H) and mounting configuration. SS11VL-04350 provides higher current capacity (400mA vs. 300mA) and lower DC resistance (2.6Ohm vs. 4.1Ohm), with 35 mH inductance @ 1 kHz. SS11VL-03550 offers higher inductance (55 mH @ 1 kHz) at the original 300mA rating. Selection depends on circuit requirements for current handling and inductance filtering characteristics.

Q: Are all substitute parts RoHS compliant?

A: Yes. B82722J2301N001, SS11VL-03550, and SS11VL-04350 are all ROHS3 compliant. The original ELF-15N003A is RoHS non-compliant, making these substitutes necessary for applications requiring regulatory compliance.

Q: What is the impact of DC resistance differences on circuit performance?

A: DC resistance affects power dissipation and voltage drop across the component. B82722J2301N001 (2.5Ohm) and SS11VL-04350 (2.6Ohm) provide lower dissipation than ELF-15N003A (3.154Ohm). SS11VL-03550 (4.1Ohm) exhibits higher dissipation. Selection should account for thermal management and power budget requirements in the target application.

Q: Do substitute parts require different PCB footprints?

A: All substitute parts maintain the vertical 4-pin through-hole package configuration, preserving electrical connectivity. However, physical dimensions vary, requiring PCB layout adjustment. B82722J2301N001 and KEMET parts (SS11VL series) have different length, width, and height specifications compared to ELF-15N003A. Verify component placement clearances and trace routing before production implementation.