ELF-18D650B Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-18D650B is a 2-line common mode choke (CMC) manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 2.4A current handling capability. This component features a typical DC resistance of 101mOhm and is housed in a vertical 4-pin package with dimensions of 29.00mm × 21.00mm × 34.60mm.

The ELF-18D650B is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Substiute Parts

ELF-18D650B

Panasonic Electronic ComponentsIn Stock: 923ELF-18D650B Datasheet

Current PartRFQ

B82734R2462B030

EPCOS - TDK ElectronicsIn Stock: 1609B82734R2462B030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-18D650B is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration to maintain circuit topology compatibility
• Mounting Type: Must be through-hole to ensure PCB assembly compatibility
• Package Configuration: Must be vertical 4-pin package for footprint alignment
• Current Rating: Substitute must meet or exceed 2.4A maximum current requirement
• DC Resistance: Substitute DCR must be compatible with circuit impedance requirements

The B82734R2462B030 from EPCOS - TDK Electronics meets these substitution criteria. While it exhibits enhanced electrical performance characteristics (higher current rating and lower DCR), it maintains the same mechanical form factor and functional classification as a 2-line through-hole common mode choke.

Parameter Comparison

Engineering Selection Recommendations

The B82734R2462B030 is the identified substitute for the obsolete ELF-18D650B based on functional and mechanical compatibility. Selection of this substitute is supported by the following factors:

• Active Product Status: The B82734R2462B030 maintains active production status, ensuring long-term component availability and supply chain reliability
• Enhanced Performance Margin: The substitute provides higher current rating (4.6A vs. 2.4A) and lower DC resistance (46mOhm vs. 101mOhm), delivering improved thermal performance and reduced power dissipation
• Regulatory Compliance: The B82734R2462B030 carries ROHS3 compliance and REACH status documentation, meeting modern environmental and regulatory requirements
• Third-Party Certifications: Approvals from ENEC, UR, and VDE provide independent validation of electrical safety and performance standards
• Mechanical Compatibility: Vertical 4-pin through-hole package configuration ensures direct PCB footprint compatibility with minimal design modification

Frequently Asked Questions (FAQ)

Q: Can the B82734R2462B030 be used as a direct replacement for the ELF-18D650B?

A: Yes. Both components are 2-line common mode chokes with vertical 4-pin through-hole packages. The substitute meets or exceeds all critical electrical parameters of the original part. Dimensional differences (length: 32.50mm vs. 29.00mm; height: 31.00mm vs. 34.60mm) are minor and typically accommodated within standard PCB layout tolerances.

Q: What are the key differences between these two parts?

A: The B82734R2462B030 provides superior electrical performance with 4.6A current rating versus 2.4A, and 46mOhm DCR versus 101mOhm. The substitute includes specified AC voltage rating (250V), operating temperature range (-40°C to 125°C), and third-party safety certifications. The original ELF-18D650B lacks these specifications.

Q: Are there any compatibility concerns with PCB assembly?

A: The substitute is slightly longer (32.50mm vs. 29.00mm) and shorter in height (31.00mm vs. 34.60mm). Verify that the PCB layout accommodates the revised dimensions. The 4-pin vertical configuration remains identical, ensuring pin compatibility.

Q: Does the lower DC resistance of the substitute affect circuit operation?

A: Lower DC resistance reduces power dissipation and heat generation. In applications where the original 101mOhm DCR was specified, the 46mOhm substitute will improve thermal performance. Verify that circuit impedance requirements do not depend on the higher resistance value of the original part.

Q: What certifications does the substitute carry?

A: The B82734R2462B030 is ROHS3 compliant, REACH affected, and approved by ENEC, UR, and VDE. These certifications validate compliance with European electrical safety standards and environmental regulations.