ELF-18D618 Equivalent & Substitute Parts

Part Overview

The ELF-18D618 is a 27 mH Common Mode Choke (CMC) manufactured by Panasonic Electronic Components, designed for 2-line filtering applications in power distribution circuits. This through-hole component is rated for 800mA maximum current with a typical DC resistance of 708mOhm and operates across a temperature range of -20°C to 105°C. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations where legacy component specifications must be maintained.

Substiute Parts

ELF-18D618

Panasonic Electronic ComponentsIn Stock: 1111ELF-18D618 Datasheet

Current PartRFQ

RN214-0.8-02

Schaffner EMC Inc.In Stock: 1116RN214-0.8-02 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELF-18D618 is determined by the following critical parameters:

Primary Matching Criteria:

• Number of Lines: 2 (mandatory match)
• Inductance Value: 27 mH (mandatory match)
• Current Rating: 800mA minimum (mandatory match)
• Voltage Rating - AC: 250V minimum (mandatory match)
• Mounting Type: Through Hole (mandatory match)
• Package / Case: Vertical, 4 PC Pin (mandatory match)

Secondary Compatibility Factors:

• DC Resistance: Lower values are acceptable (improved performance)
• Operating Temperature Range: Extended ranges are acceptable
• Frequency Specification: Inductance measured at different frequencies (1 kHz vs. 10 kHz) remains functionally equivalent for common mode filtering applications

The substitute part RN214-0.8-02 meets all primary matching criteria and demonstrates improved DC resistance characteristics, making it a valid functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The RN214-0.8-02 manufactured by Schaffner EMC Inc. is a qualified substitute for the ELF-18D618. Both components are classified as obsolete products, indicating limited availability through standard distribution channels.

Selection Basis:

The RN214-0.8-02 satisfies all mandatory electrical and mechanical parameters required for direct substitution. The component demonstrates superior DC resistance characteristics (500mOhm vs. 708mOhm), resulting in reduced power dissipation and improved thermal performance. The extended operating temperature range (-40°C to 125°C vs. -20°C to 105°C) provides additional environmental margin.

The RN214-0.8-02 carries UR and VDE approvals and is RoHS Compliant, meeting modern regulatory compliance requirements. Physical dimensions differ slightly; the substitute is more compact in footprint (23.00mm x 15.50mm vs. 28.50mm x 29.00mm) while maintaining compatible through-hole pin configuration and vertical mounting orientation.

Both components are packaged for through-hole assembly with identical electrical line configuration and current handling capacity, ensuring functional compatibility in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the RN214-0.8-02 directly replace the ELF-18D618 in existing designs?

A: Yes. Both components share identical electrical specifications for number of lines (2), inductance value (27 mH), current rating (800mA), and AC voltage rating (250V). The through-hole mounting configuration and vertical 4-pin package are identical. Physical footprint differences are minor and do not affect electrical performance.

Q: What is the significance of the different inductance measurement frequencies (1 kHz vs. 10 kHz)?

A: Inductance values for common mode chokes vary slightly across frequency ranges due to core material characteristics. Both measurements represent the same 27 mH inductance value and are functionally equivalent for common mode filtering applications in typical power distribution circuits.

Q: Does the lower DC resistance of the RN214-0.8-02 affect compatibility?

A: No. Lower DC resistance is a performance improvement, not a compatibility issue. The RN214-0.8-02 will generate less heat during operation while maintaining identical filtering characteristics.

Q: Are there physical installation considerations when substituting these components?

A: The RN214-0.8-02 has a smaller footprint (23.00mm x 15.50mm vs. 28.50mm x 29.00mm). Verify that the reduced dimensions do not conflict with existing PCB layout constraints. Pin spacing and through-hole configuration remain compatible.

Q: What regulatory certifications does the substitute part carry?

A: The RN214-0.8-02 is certified by UR and VDE and is RoHS Compliant. The original ELF-18D618 does not list specific approval agencies. The substitute meets current regulatory standards for power line filtering components.

Q: Are both parts currently available for procurement?

A: Both the ELF-18D618 and RN214-0.8-02 are classified as obsolete products. Availability is limited to existing inventory through authorized distributors. Current inventory levels should be verified with component suppliers before design implementation.