ELF-17N008A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-17N008A is a 2-line common mode choke manufactured by Panasonic Electronic Components, rated for 800mA maximum current with a typical DC resistance of 548mOhm. This through-hole component is designed for power line filtering applications. The part is currently obsolete, making identification of suitable substitute components necessary for ongoing system support, maintenance, and new design implementations where equivalent performance characteristics are required.

Substiute Parts

ELF-17N008A

Panasonic Electronic ComponentsIn Stock: 892ELF-17N008A Datasheet

Current PartRFQ

B82722J2801N020

EPCOS - TDK ElectronicsIn Stock: 1184B82722J2801N020 Datasheet

SimilarRFQ

SS11VL-R08125

KEMETIn Stock: 772SS11VL-R08125 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute components for the ELF-17N008A are qualified based on the following critical parameters:

• Number of Lines: Must be 2-line configuration
• Current Rating: Must support minimum 800mA
• Mounting Type: Must be through-hole
• Package Configuration: Must be vertical, 4-pin package
• DC Resistance: Should be within acceptable range for power line filtering applications (548mOhm baseline)

The two identified substitute parts meet these core electrical and mechanical requirements while offering active product status and improved compliance profiles.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with ROHS3 compliance, addressing the obsolescence and regulatory limitations of the ELF-17N008A.

B82722J2801N020 (EPCOS - TDK Electronics) maintains the closest DC resistance profile at 600mOhm typical, with specified AC voltage rating of 250V and extended operating temperature range (-40°C to 125°C). This part carries ENEC, UR, and VDE approvals. Physical dimensions are larger (23.30mm x 16.10mm with 25.40mm height), requiring PCB layout verification for space-constrained applications.

SS11VL-R08125 (KEMET) offers the most compact footprint at 22.00mm x 14.50mm with 19.50mm height, suitable for space-limited designs. DC resistance is 740mOhm typical, representing a 35% increase over the original part. Operating temperature range is -25°C to 120°C with 250V AC rating. This part is ROHS3 compliant with REACH unaffected status.

Selection between these substitutes depends on PCB layout constraints, thermal environment requirements, and acceptable DC resistance variance for the application circuit.

Frequently Asked Questions (FAQ)

Q: Can the B82722J2801N020 or SS11VL-R08125 be used as direct replacements for the ELF-17N008A?

A: Both parts meet the core electrical specifications (2-line configuration, 800mA current rating, through-hole mounting, vertical 4-pin package). However, physical dimensions differ, requiring PCB layout verification. DC resistance values also differ (600mOhm and 740mOhm respectively versus 548mOhm), which may affect circuit performance depending on application requirements.

Q: What are the main differences between the two substitute options?

A: The B82722J2801N020 has lower DC resistance (600mOhm) and wider operating temperature range (-40°C to 125°C), but larger physical dimensions. The SS11VL-R08125 has a more compact footprint and lower height profile, but higher DC resistance (740mOhm) and narrower operating temperature range (-25°C to 120°C).

Q: Are both substitute parts RoHS compliant?

A: Yes, both B82722J2801N020 and SS11VL-R08125 are ROHS3 compliant, addressing the RoHS non-compliance status of the obsolete ELF-17N008A.

Q: Will the increased DC resistance of the SS11VL-R08125 affect circuit performance?

A: The SS11VL-R08125 has 740mOhm DC resistance compared to the original 548mOhm. This 35% increase may impact power dissipation and filtering characteristics. Circuit simulation or testing is necessary to determine acceptability for specific applications.

Q: What certifications do these substitute parts carry?

A: The B82722J2801N020 carries ENEC, UR, and VDE approvals. The SS11VL-R08125 does not list specific approval agencies in the provided specifications.

Q: Are there physical space considerations when substituting these parts?

A: Yes. The original ELF-17N008A measures 15.00mm x 22.70mm with 22.50mm height. The B82722J2801N020 is larger (23.30mm x 16.10mm, 25.40mm height), while the SS11VL-R08125 is more compact (22.00mm x 14.50mm, 19.50mm height). PCB layout must accommodate these dimensional differences.