ELF-18D270C Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-18D270C is a 2-line common mode choke (CMC) manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 1.5A current handling capability. This component features a typical DC resistance of 162mOhm and is housed in a vertical 4-pin package with dimensions of 20.00mm × 21.00mm × 20.00mm (L × W × H).

The ELF-18D270C carries an obsolete product status. Identifying functionally equivalent substitute components is essential for design continuity, procurement planning, and system reliability in applications where this part is currently deployed or specified.

Substiute Parts

ELF-18D270C

Panasonic Electronic ComponentsIn Stock: 774ELF-18D270C Datasheet

Current PartRFQ

EH20-1.5-02-1M8

Schaffner EMC Inc.In Stock: 1185EH20-1.5-02-1M8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELF-18D270C is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration
• Current Rating: Must support minimum 1.5A
• Mounting Type: Must be through-hole compatible
• Package Pin Configuration: Must be 4-pin package
• DC Resistance: Substitute DCR must not exceed the application's tolerance requirements

The EH20-1.5-02-1M8 manufactured by Schaffner EMC Inc. meets the core electrical and mechanical substitution criteria. This part maintains the 2-line, 1.5A, through-hole configuration with 4-pin connectivity. The substitute exhibits lower DC resistance (72mOhm typical) and includes specified AC voltage rating and operating temperature range, providing enhanced performance characteristics within the same functional category.

Parameter Comparison

Engineering Selection Recommendations

The EH20-1.5-02-1M8 is the designated substitute for the obsolete ELF-18D270C based on functional equivalence across core electrical parameters (2-line configuration, 1.5A current rating, through-hole mounting, 4-pin package).

Product Status Consideration: The EH20-1.5-02-1M8 maintains active product status with Schaffner EMC Inc., ensuring ongoing availability and supply chain continuity compared to the obsolete ELF-18D270C.

Compliance & Certifications: The EH20-1.5-02-1M8 is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement in regulated industries.

Physical Integration: The substitute exhibits comparable footprint dimensions (21.00mm × 21.00mm vs. 20.00mm × 21.00mm) with slightly reduced height (18.80mm vs. 20.00mm). The transition from vertical to horizontal pin orientation requires PCB layout verification to confirm mechanical compatibility.

Electrical Performance: The substitute provides superior DC resistance characteristics (72mOhm vs. 162mOhm), resulting in reduced power dissipation and improved thermal performance in equivalent current-carrying applications.

Frequently Asked Questions (FAQ)

Q: Can the EH20-1.5-02-1M8 directly replace the ELF-18D270C without PCB modification?

A: Both components share identical electrical specifications (2-line, 1.5A, through-hole, 4-pin). However, the pin orientation differs (vertical vs. horizontal). PCB layout review is required to confirm mechanical compatibility and pin alignment before substitution.

Q: What is the impact of the lower DC resistance in the EH20-1.5-02-1M8?

A: The substitute's 72mOhm typical DCR compared to the main part's 162mOhm results in reduced resistive losses and lower heat generation at equivalent current levels. This represents an improvement in thermal performance and power efficiency.

Q: Are there any compliance differences between these components?

A: The EH20-1.5-02-1M8 provides explicit ROHS3 compliance and REACH unaffected status. The ELF-18D270C compliance information is not specified. For applications requiring regulatory compliance documentation, the substitute offers verified certification status.

Q: What is the significance of the AC voltage rating on the substitute?

A: The EH20-1.5-02-1M8 specifies 250V AC rating, indicating suitability for power line filtering applications. The ELF-18D270C does not specify voltage ratings. Applications requiring AC voltage specification should reference the substitute's 250V AC rating.

Q: How do the package dimensions affect board layout?

A: The substitute is 1.00mm longer (21.00mm vs. 20.00mm) and 1.20mm shorter in height (18.80mm vs. 20.00mm). These dimensional differences are minor but require verification against PCB layout constraints, particularly in space-constrained applications.

Q: Is the operating temperature range a critical factor for substitution?

A: The EH20-1.5-02-1M8 specifies -25°C to 100°C operating range. The ELF-18D270C does not specify operating temperature limits. For applications operating outside standard ambient conditions, the substitute's defined temperature range provides explicit performance boundaries.