ELF-18D270J Equivalent & Substitute Parts

Part Overview

The ELF-18D270J is a 2-line common mode choke (CMC) manufactured by Panasonic Electronic Components, designed for through-hole mounting applications with a 300mA current rating and 2.691Ohm typical DC resistance. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. Substitute parts must maintain compatibility across critical electrical parameters including current rating, number of lines, mounting type, and physical dimensions to ensure direct replacement capability.

Substiute Parts

ELF-18D270J

Panasonic Electronic ComponentsIn Stock: 841ELF-18D270J Datasheet

Current PartRFQ

EH20-0.3-02-33M

Schaffner EMC Inc.In Stock: 811EH20-0.3-02-33M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-18D270J is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration
• Current Rating: Must support minimum 300mA
• Mounting Type: Must be through-hole
• Physical Compatibility: Dimensions and pin configuration must accommodate existing PCB layouts
• Electrical Performance: DC resistance and inductance characteristics must support the intended filtering application

The EH20-0.3-02-33M from Schaffner EMC Inc. qualifies as a substitute based on matching the 2-line, 300mA through-hole configuration with compatible physical dimensions and pin arrangement.

Parameter Comparison

Engineering Selection Recommendations

The EH20-0.3-02-33M serves as a functional substitute for the obsolete ELF-18D270J based on matching electrical specifications (2-line configuration, 300mA current rating) and through-hole mounting compatibility. The Schaffner component offers improved compliance status with ROHS3 certification, whereas the original Panasonic part is RoHS non-compliant. The EH20-0.3-02-33M provides lower DC resistance (1.78Ohm vs. 2.691Ohm), which may reduce power dissipation in the application. Physical dimensions are comparable with minor variations in orientation (horizontal vs. vertical pin configuration) and height, requiring PCB layout verification prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the EH20-0.3-02-33M directly replace the ELF-18D270J without PCB modification?

A: Both components share the same 4-pin through-hole configuration and compatible overall dimensions. However, the EH20-0.3-02-33M uses horizontal pin orientation while the ELF-18D270J uses vertical orientation. PCB layout verification is required to confirm pin hole compatibility and clearance.

Q: What is the significance of the lower DC resistance in the EH20-0.3-02-33M?

A: The EH20-0.3-02-33M exhibits 1.78Ohm typical DC resistance compared to 2.691Ohm in the ELF-18D270J. Lower resistance reduces resistive losses and heat generation at the 300mA operating current, potentially improving overall system efficiency.

Q: Are there compliance differences between these parts?

A: Yes. The ELF-18D270J is RoHS non-compliant, while the EH20-0.3-02-33M is ROHS3 compliant. For applications requiring RoHS compliance, the Schaffner component is the appropriate selection.

Q: What is the inductance specification of the EH20-0.3-02-33M?

A: The EH20-0.3-02-33M is rated at 33 mH @ 400 Hz. The ELF-18D270J inductance specification was not provided in the available documentation.

Q: Does the EH20-0.3-02-33M support the same voltage rating?

A: The EH20-0.3-02-33M is rated for 250V AC operation. The ELF-18D270J voltage rating information was not provided in the available documentation.