ELF-18D290G Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-18D290G is a 2-line common mode choke manufactured by Panasonic Electronic Components, designed for through-hole mounting applications with a 600mA current rating and 782mOhm typical DC resistance. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part features a vertical 4-pin configuration with compact dimensions of 21.00mm × 16.00mm × 22.50mm height.

Substiute Parts

ELF-18D290G

Panasonic Electronic ComponentsIn Stock: 1005ELF-18D290G Datasheet

Current PartRFQ

7448640415

Würth ElektronikIn Stock: 11667448640415 Datasheet

SimilarRFQ

B82731M2601A030

EPCOS - TDK ElectronicsIn Stock: 6757B82731M2601A030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELF-18D290G are qualified based on the following critical parameters that determine functional compatibility:

• Number of Lines: Must be 2-line configuration
• Current Rating: Must support minimum 600mA
• Mounting Type: Must be through-hole
• Package Configuration: Must be vertical 4-pin
• Physical Dimensions: Length and width must accommodate PCB layout constraints; height must not exceed 22.50mm
• DC Resistance: Must be within acceptable range for the application (782mOhm typical baseline)

The two substitute parts listed below meet these core substitution criteria while offering active product status and improved compliance profiles.

Parameter Comparison

Engineering Selection Recommendations

7448640415 (Würth Elektronik WE-FC Series)

This substitute offers active product status with ROHS3 compliance. The DC resistance of 708mOhm is lower than the original 782mOhm, providing reduced power dissipation. Physical dimensions are nearly identical to the original part, with a maximum height of 22.50mm matching the ELF-18D290G. The part includes 250V AC voltage rating and -40°C to 125°C operating temperature range. This option is suitable for applications where RoHS3 compliance is required and lower DCR is beneficial.

B82731M2601A030 (EPCOS - TDK B82731 Series)

This substitute provides active product status with ROHS3 compliance and additional regulatory approvals (ENEC, UR, VDE). The DC resistance is 1.5Ohm, which is higher than the original part. Physical dimensions are compatible with slightly reduced width (15.00mm vs 16.00mm) and lower height (20.50mm vs 22.50mm), offering improved PCB space efficiency. The part includes 250V AC voltage rating and -40°C to 125°C operating temperature range. This option is suitable for applications requiring enhanced regulatory certifications and compact form factor.

Frequently Asked Questions (FAQ)

Q: Can I use the 7448640415 as a direct replacement for the ELF-18D290G?

A: Yes, the 7448640415 meets all core substitution criteria: 2-line configuration, 600mA current rating, through-hole mounting, vertical 4-pin package, and compatible physical dimensions. The lower DC resistance (708mOhm vs 782mOhm) may be advantageous in power-sensitive applications.

Q: What is the main difference between the two substitute parts?

A: The primary differences are DC resistance (708mOhm for 7448640415 vs 1.5Ohm for B82731M2601A030)