ELF-18D609 Equivalent & Substitute Parts

Part Overview

The ELF-18D609 is a 12 mH Common Mode Choke (CMC) with 2-line configuration, rated for 1.3A maximum current, designed for through-hole mounting. Manufactured by Panasonic Electronic Components, this component is classified as obsolete. Due to its discontinued status, identifying equivalent substitute parts with matching electrical and mechanical specifications is essential for design continuity and procurement planning.

Substiute Parts

ELF-18D609

Panasonic Electronic ComponentsIn Stock: 861ELF-18D609 Datasheet

Current PartRFQ

LF2823NP-123

Sumida America Components Inc.In Stock: 869LF2823NP-123 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELF-18D609 is determined by the following critical parameters:

• Inductance Value: Must match 12 mH @ 1 kHz
• Number of Lines: Must be 2-line configuration
• Mounting Type: Must be Through Hole
• Package Configuration: Must be Vertical, 4 PC Pin
• Current Rating: Substitute must support minimum 1.3A operation
• DC Resistance: Should not significantly exceed 309mOhm to maintain circuit performance
• Physical Dimensions: Must fit within or closely match the specified footprint

The LF2823NP-123 (Sumida America Components Inc.) meets the core electrical and mechanical substitution criteria, sharing identical inductance, line configuration, mounting type, and package style.

Parameter Comparison

Engineering Selection Recommendations

The LF2823NP-123 serves as a functional equivalent for the obsolete ELF-18D609 based on matched electrical specifications (inductance, line configuration) and mechanical compatibility (through-hole mounting, vertical 4-pin package, similar footprint).

Considerations for selection:

• The LF2823NP-123 has a maximum current rating of 1.2A compared to the ELF-18D609's 1.3A. Applications operating at or near 1.3A should evaluate whether the 1.2A rating is acceptable for the intended circuit.
• DC resistance of the LF2823NP-123 is 380mOhm versus 309mOhm for the original part. This 71mOhm difference may introduce additional power dissipation in high-current applications.
• The LF2823NP-123 is ROHS3 compliant, whereas the ELF-18D609 is non-compliant. This compliance status may be advantageous for new designs or regulatory requirements.
• Physical dimensions are closely matched, with the substitute width reduced by 0.020" (0.50mm) and height increased by 0.020" (0.50mm), which should not impact PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LF2823NP-123 directly replace the ELF-18D609 in existing designs?

A: The LF2823NP-123 is mechanically and electrically compatible for most applications. However, the lower current rating (1.2A vs. 1.3A) and higher DC resistance (380mOhm vs. 309mOhm) must be evaluated against your circuit's operating conditions.

Q: What is the significance of the current rating difference?

A: The ELF-18D609 is rated for 1.3A maximum, while the LF2823NP-123 is rated for 1.2A. If your application requires sustained operation above 1.2A, the substitute may not be suitable without thermal analysis.

Q: How does the higher DC resistance affect performance?

A: The 71mOhm increase in DC resistance will result in additional power dissipation (I²R losses). For a 1.2A circuit, this represents approximately 55mW additional dissipation compared to the original part.

Q: Are the physical dimensions compatible with the original PCB layout?

A: Yes. The LF2823NP-123 maintains the same through-hole mounting configuration and vertical 4-pin package. Minor dimensional variations (0.020" in width and height) are within typical PCB design tolerances.

Q: What is the RoHS compliance advantage?

A: The LF2823NP-123 is ROHS3 compliant, making it suitable for applications requiring lead-free and restricted substance compliance. The original ELF-18D609 is non-compliant.