ELF-18D290B Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-18D290B is a 2-line common mode choke (CMC) manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 2A current handling capability. This component features a typical DC resistance of 72mOhm and is housed in a vertical 4-pin package with dimensions of 21.00mm × 16.00mm × 22.50mm (height).

The ELF-18D290B carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

ELF-18D290B

Panasonic Electronic ComponentsIn Stock: 882ELF-18D290B Datasheet

Current PartRFQ

EV20-2.0-02-0M8

Schaffner EMC Inc.In Stock: 19747EV20-2.0-02-0M8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-18D290B is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration
• Current Rating: Must support minimum 2A
• Mounting Type: Must be through-hole compatible
• Package Configuration: Must use vertical 4-pin package
• Physical Dimensions: Footprint compatibility (21.00mm × 16.00mm base dimensions)
• DC Resistance: Should be comparable or lower to maintain circuit performance

The EV20-2.0-02-0M8 from Schaffner EMC Inc. meets these substitution criteria. It maintains the same 2-line configuration, 2A current rating, through-hole mounting, vertical 4-pin package, and identical base footprint dimensions. The substitute part features improved DC resistance (38mOhm typical versus 72mOhm) and includes additional electrical specifications including inductance rating and AC voltage rating.

Parameter Comparison

Engineering Selection Recommendations

The EV20-2.0-02-0M8 is the qualified substitute for the obsolete ELF-18D290B based on the following engineering criteria:

Functional Compatibility: Both components maintain identical 2-line, 2A common mode choke specifications with matching through-hole, vertical 4-pin package configurations and base footprint dimensions.

Product Status: The EV20-2.0-02-0M8 carries active product status with established supply chain availability, addressing the obsolescence of the original ELF-18D290B.

Compliance and Certifications: The EV20-2.0-02-0M8 is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements. Both components share identical ECCN classification (EAR99).

Performance Improvement: The substitute part provides superior DC resistance performance (38mOhm typical versus 72mOhm), resulting in reduced power dissipation and improved thermal characteristics in the application circuit.

Physical Considerations: The substitute part height is 26.00mm compared to 22.50mm for the original. Verify available PCB clearance in the target application before implementation.

Frequently Asked Questions (FAQ)

Q: Can the EV20-2.0-02-0M8 be used as a direct replacement for the ELF-18D290B?

A: Yes, for applications where the increased height (26.00mm versus 22.50mm) does not create physical constraints. Both components share identical electrical specifications for number of lines, current rating, and package configuration, with matching base footprint dimensions.

Q: What is the impact of the lower DC resistance in the substitute part?

A: The EV20-2.0-02-0M8 features 38mOhm typical DC resistance compared to 72mOhm in the original part. This reduction decreases resistive losses and heat generation in the circuit, generally improving overall system efficiency.

Q: Are there any compliance differences between the two parts?

A: The EV20-2.0-02-0M8 provides explicit RoHS3 compliance and REACH status documentation. Both parts share the same ECCN classification. Verify compliance requirements for your specific application and regulatory jurisdiction.

Q: What is the height difference and does it matter?

A: The substitute part is 4.60mm taller (26.00mm versus 22.50mm). Verify available vertical clearance on the