ELF-18D431F Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-18D431F is a 10 mH, 2-line common mode choke manufactured by Panasonic Electronic Components, designed for through-hole mounting applications with a maximum current rating of 1A. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -20°C to 105°C and is rated for 250V AC applications.

Substiute Parts

ELF-18D431F

Panasonic Electronic ComponentsIn Stock: 1066ELF-18D431F Datasheet

Current PartRFQ

EH24-1.0-02-10M

Schaffner EMC Inc.In Stock: 1073EH24-1.0-02-10M Datasheet

SimilarRFQ

EV24-1.0-02-10M

Schaffner EMC Inc.In Stock: 2811EV24-1.0-02-10M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-18D431F is based on the following critical parameters that must be maintained or improved:

• Number of Lines: Must remain 2-line configuration
• Inductance Value: 10 mH nominal, with measurement frequency tolerance
• Current Rating: Minimum 1A capability
• DC Resistance: Lower or equivalent DCR values are acceptable
• Voltage Rating: Minimum 250V AC
• Operating Temperature Range: Must support the required application temperature envelope
• Mounting Type: Through-hole configuration required
• Pin Configuration: 4-pin package compatible with vertical or horizontal orientation

The substitute parts EH24-1.0-02-10M and EV24-1.0-02-10M from Schaffner EMC Inc. meet these core electrical and mechanical requirements while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

EH24-1.0-02-10M is suitable for applications where horizontal PCB mounting orientation is acceptable. This part offers improved DC resistance (244 mOhm vs. 384 mOhm), ROHS3 compliance, and active product status. The horizontal package configuration requires board layout accommodation.

EV24-1.0-02-10M is suitable for applications requiring vertical PCB mounting orientation matching the original ELF-18D431F footprint. This part provides the same improved DC resistance performance and ROHS3 compliance. The increased height (1.185" vs. 0.807") must be verified against available board clearance.

Both substitute parts operate within the required temperature range with extended lower temperature capability (-25°C vs. -20°C). Selection between EH24-1.0-02-10M and EV24-1.0-02-10M depends on PCB layout constraints and available vertical clearance.

Frequently Asked Questions (FAQ)

Q: Can EH24-1.0-02-10M and EV24-1.0-02-10M be used interchangeably with ELF-18D431F?

A: Both parts meet the core electrical requirements (10 mH inductance, 1A current rating, 250V AC voltage rating, 2-line configuration). However, they differ in package orientation and physical dimensions. EV24-1.0-02-10M maintains vertical orientation compatibility, while EH24-1.0-02-10M uses horizontal orientation. PCB layout and clearance must be verified before selection.

Q: What is the significance of the different inductance measurement frequencies?

A: The ELF-18D431F specifies 10 mH @ 1 kHz, EH24-1.0-02-10M specifies 10 mH @ 10 kHz, and EV24-1.0-02-10M specifies 10 mH @ 400 Hz. These represent the measurement conditions under which inductance was characterized. The nominal 10 mH value remains consistent across all three parts for the intended application frequency range.

Q: Are there compliance differences between the main part and substitutes?

A: The ELF-18D431F product status is obsolete with unspecified RoHS compliance. Both EH24-1.0-02-10M and EV24-1.0-02-10M are active products with ROHS3 compliance certification and REACH unaffected status, providing improved regulatory alignment for new designs.

Q: How does the lower DC resistance of substitute parts affect circuit performance?

A: The substitute parts feature 244 mOhm DCR compared to 384 mOhm for the ELF-18D431F. Lower DC resistance reduces power dissipation and heat generation in the component, which is beneficial for thermal management and efficiency.

Q: What are the physical footprint considerations?

A: EV24-1.0-02-10M maintains similar footprint dimensions (0.969" L x 0.685" W) with increased height (1.185" vs. 0.807"). EH24-1.0-02-10M has slightly reduced footprint (0.945" L x 0.945" W) with comparable height (0.827"). Board layout and available clearance must be evaluated for each application.