ELF-18D850U Equivalent & Substitute Parts

Part Overview

The ELF-18D850U is a 2-line common mode choke (CMC) manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 1.2A current handling capability. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part features a typical DC resistance of 469mOhm and is packaged in a vertical 4-pin configuration with compact dimensions of 36.00mm × 25.50mm × 40.00mm.

Substiute Parts

ELF-18D850U

Panasonic Electronic ComponentsIn Stock: 917ELF-18D850U Datasheet

Current PartRFQ

B82734R2132B030

EPCOS - TDK ElectronicsIn Stock: 2856B82734R2132B030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELF-18D850U is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration
• Mounting Type: Must be through-hole
• Package Configuration: Must be vertical 4-pin
• Current Rating: Substitute must meet or exceed 1.2A
• DC Resistance: Substitute DCR must be compatible with circuit design requirements
• Physical Compatibility: Dimensions must accommodate existing PCB layouts

The B82734R2132B030 qualifies as a substitute based on matching 2-line through-hole configuration, vertical 4-pin package, and exceeding the current rating requirement (1.3A vs. 1.2A). The substitute maintains compatible DC resistance characteristics (560mOhm typical) and provides additional operational advantages including active product status and enhanced environmental certifications.

Parameter Comparison

Engineering Selection Recommendations

The B82734R2132B030 is suitable as a substitute for the ELF-18D850U based on the following engineering criteria:

• Functional Equivalence: Both components are 2-line common mode chokes with through-hole vertical 4-pin configuration, meeting core functional requirements.
• Current Capacity: The substitute provides 1.3A rating, exceeding the original 1.2A specification.
• Product Lifecycle: The substitute is active production status, ensuring long-term availability and supply chain stability compared to the obsolete original part.
• Regulatory Compliance: The substitute carries ENEC, UR, and VDE approvals with ROHS3 compliance, supporting modern regulatory requirements.
• Physical Footprint: The substitute features reduced dimensions (32.50mm × 21.00mm × 31.00mm), offering potential PCB layout optimization benefits.

Frequently Asked Questions (FAQ)

Q: Can the B82734R2132B030 directly replace the ELF-18D850U in existing designs?

A: Yes, the substitute meets the core functional requirements: 2-line configuration, through-hole mounting, vertical 4-pin package, and current rating exceeding 1.2A. The reduced physical dimensions may require PCB layout verification to confirm clearance compatibility.

Q: What is the impact of the 91mOhm increase in DC resistance (469mOhm to 560mOhm)?

A: The DC resistance difference must be evaluated within the specific circuit application. The substitute's higher DCR may result in increased power dissipation and heat generation. Circuit simulation or thermal analysis is necessary to confirm acceptability for the target application.

Q: Why is the substitute part smaller than the original?

A: The B82734R2132B030 represents a more compact design iteration from EPCOS-TDK Electronics. The reduced footprint (32.50mm × 21.00mm × 31.00mm versus 36.00mm × 25.50mm × 40.00mm) reflects modern component miniaturization while maintaining electrical performance specifications.

Q: Are there any environmental or compliance advantages to using the substitute?

A: The substitute provides specified operating temperature range (-40°C ~ 125°C), AC voltage rating (250V), and regulatory certifications (ENEC, UR, VDE) with ROHS3 compliance. These specifications support applications requiring documented environmental and regulatory compliance.

Q: What packaging format is the substitute available in?

A: The B82734R2132B030 is supplied in tray packaging, compared to the original part's unspecified packaging format. Confirm tray packaging compatibility with your procurement and assembly processes.