ELF-18D609F Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-18D609F is a 12 mH common mode choke manufactured by Panasonic Electronic Components, designed for two-line filtering applications in through-hole configurations. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates at 1.6A maximum current with a typical DC resistance of 226 mOhm and is rated for 250V AC operation across an operating temperature range of -20°C to 105°C.

Substiute Parts

ELF-18D609F

Panasonic Electronic ComponentsIn Stock: 889ELF-18D609F 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-18D609F is determined by the following critical parameters:

• Inductance Value: 12 mH @ 1 kHz (exact match required)
• Number of Lines: 2-line configuration (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Configuration: Vertical, 4 PC Pin (exact match required)
• Current Rating: Minimum 1.6A required for direct substitution
• DC Resistance: Maximum 226 mOhm preferred; higher values acceptable with thermal analysis
• Voltage Rating - AC: Minimum 250V required
• Operating Temperature Range: Minimum -20°C to 105°C required

The LF2823NP-123 manufactured by Sumida America Components Inc. meets the core electrical and mechanical requirements for substitution. However, the current rating differential (1.2A vs. 1.6A) and higher DC resistance (380 mOhm vs. 226 mOhm) represent design trade-offs that must be evaluated within the specific application context.

Parameter Comparison

Engineering Selection Recommendations

The LF2823NP-123 is available as an active product from Sumida America Components Inc., providing supply continuity for the obsolete ELF-18D609F. The substitute part maintains identical inductance, line configuration, and mounting specifications. The LF2823NP-123 achieves ROHS3 compliance, whereas the original part is RoHS non-compliant.

Design considerations for substitution include the reduced current rating (1.2A vs. 1.6A) and increased DC resistance (380 mOhm vs. 226 mOhm). These parameters directly impact thermal performance and voltage drop characteristics. Applications operating at or near the 1.6A maximum rating of the original part require verification that the 1.2A rating of the substitute is adequate. The higher DC resistance will result in increased power dissipation under load.

The LF2823NP-123 is suitable for applications where current demand does not exceed 1.2A and where the increased resistive losses are acceptable within the thermal budget of the design.

Frequently Asked Questions (FAQ)

Q: Can the LF2823NP-123 directly replace the ELF-18D609F in all applications?

A: Direct replacement is possible only in applications where the circuit current does not exceed 1.2A. The substitute part has a lower current rating and higher DC resistance than the original. Verify that your application current requirements fall within the 1.2A maximum rating of the LF2823NP-123.

Q: What is the impact of the higher DC resistance in the LF2823NP-123?

A: The LF2823NP-123 has a DC resistance of 380 mOhm compared to 226 mOhm in the ELF-18D609F. This 68% increase in resistance will result in higher power dissipation and voltage drop across the component. Calculate the additional heat generation using P = I²R and verify that thermal management remains adequate.

Q: Are the physical dimensions compatible?

A: Both parts use identical mounting types (Through Hole, Vertical, 4 PC Pin configuration). The LF2823NP-123 has slightly different length and height dimensions (28.50mm L x 28.50mm W vs. 28.50mm L x 29.00mm W, and 24.00mm height vs. 24.60mm height). Verify PCB layout clearances before substitution.

Q: What is the significance of the RoHS compliance difference?

A: The ELF-18D609F is RoHS non-compliant, while the LF2823NP-123 is ROHS3 compliant. If your application or regulatory requirements mandate RoHS compliance, the LF2823NP-123 meets this requirement. If legacy RoHS non-compliant designs are acceptable, this difference is not a limiting factor.

Q: Are there any voltage or temperature rating concerns?

A: The ELF-18D609F specifies 250V AC operation and -20°C to 105°C operating temperature. The LF2823NP-123 does not provide explicit voltage or temperature specifications in the available data. Obtain complete specifications from Sumida before finalizing substitution in applications with specific voltage or temperature requirements.