ELF-18D450A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-18D450A is a 2-line common mode choke (CMC) designed for through-hole mounting applications requiring 2A current handling capability. Manufactured by Panasonic Electronic Components as part of the V series, this component is classified as obsolete product status. Due to its obsolete designation, identifying functionally equivalent substitute parts is essential for ongoing design support, production continuity, and system maintenance where this component is currently deployed.

Substiute Parts

ELF-18D450A

Panasonic Electronic ComponentsIn Stock: 816ELF-18D450A Datasheet

Current PartRFQ

B82734R2202B030

EPCOS - TDK ElectronicsIn Stock: 3317B82734R2202B030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-18D450A is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration for common mode filtering
• Current Rating: Minimum 2A to maintain electrical performance in the application circuit
• Mounting Type: Through-hole mounting required for PCB compatibility
• Package Configuration: Vertical, 4-pin package for mechanical fit and pin alignment
• DC Resistance (DCR): Electrical performance parameter affecting power dissipation and filtering characteristics

The substitute part B82734R2202B030 meets these core substitution criteria while maintaining functional equivalence for 2-line common mode choke applications.

Parameter Comparison

Engineering Selection Recommendations

The B82734R2202B030 substitute part is suitable for applications currently using the ELF-18D450A based on the following factors:

• Product Status Alignment: The substitute is active product status, ensuring long-term availability and supply chain continuity compared to the obsolete ELF-18D450A
• Regulatory Compliance: The B82734R2202B030 carries ENEC, UR, and VDE approvals, along with ROHS3 compliance, meeting modern regulatory requirements
• Electrical Compatibility: Both parts maintain 2A current rating and 2-line configuration, preserving core filtering functionality
• Mechanical Fit: Through-hole vertical 4-pin package configuration is identical, allowing direct PCB mounting without layout modification
• Physical Dimensions: Substitute dimensions are slightly larger (32.50mm x 21.00mm vs. 25.00mm x 18.00mm), requiring verification of available PCB space

The increased DC resistance (240mOhm vs. 110mOhm) in the substitute part results in higher power dissipation and should be evaluated against thermal design constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can the B82734R2202B030 be used as a direct replacement for the ELF-18D450A?

A: The B82734R2202B030 is functionally equivalent for 2-line common mode choke applications with 2A current requirements. Both parts share identical line count, current rating, mounting type, and package configuration. Physical dimensions differ slightly, requiring PCB space verification. The substitute's higher DCR (240mOhm vs. 110mOhm) affects power dissipation characteristics.

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

A: Primary differences include manufacturer (Panasonic vs. EPCOS-TDK), product status (obsolete vs. active), DC resistance (110mOhm vs. 240mOhm), physical dimensions (25.00mm x 18.00mm vs. 32.50mm x 21.00mm), and regulatory certifications. The substitute includes specified voltage rating (250V AC), operating temperature range (-40°C to 125°C), and modern compliance certifications (ROHS3, ENEC, UR, VDE).

Q: Will the larger physical dimensions of the B82734R2202B030 affect my PCB layout?

A: The substitute part is approximately 7.5mm longer and 3mm wider than the original. PCB layout verification is required to confirm adequate spacing around the component footprint and clearance from adjacent components.

Q: How does the higher DC resistance of the substitute affect circuit performance?

A: The B82734R2202B030 exhibits 130mOhm higher DC resistance (240mOhm vs. 110mOhm). This increases resistive power dissipation in the component, which may affect thermal performance and filtering efficiency. Application-specific thermal and electrical analysis is necessary to confirm acceptability.

Q: Is the B82734R2202B030 compliant with current regulatory standards?

A: Yes. The B82734R2202B030 is ROHS3 compliant and carries approvals from ENEC, UR, and VDE, meeting current regulatory requirements for electronic components in most markets.