ELF-18D656V Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-18D656V is a 2-line common mode choke manufactured by Panasonic Electronic Components, designed for through-hole mounting applications with a maximum current rating of 1A and typical DC resistance of 515mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part is packaged in a vertical 4-pin configuration with dimensions of 29.00mm × 21.00mm and a height of 34.60mm.

Substiute Parts

ELF-18D656V

Panasonic Electronic ComponentsIn Stock: 987ELF-18D656V Datasheet

Current PartRFQ

B82732R2901B030

EPCOS - TDK ElectronicsIn Stock: 12860B82732R2901B030 Datasheet

SimilarRFQ

B82734R2172B030

EPCOS - TDK ElectronicsIn Stock: 9215B82734R2172B030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELF-18D656V are identified based on the following critical parameters that determine functional compatibility:

• Number of Lines: Must be 2-line configuration
• Mounting Type: Must be through-hole
• Package Configuration: Must be vertical, 4-pin package
• Current Rating: Must meet or exceed 1A maximum current requirement
• DC Resistance: Should be comparable to 515mOhm typical value for equivalent performance
• Mechanical Compatibility: Physical dimensions must accommodate existing PCB layouts

The two substitute parts listed below satisfy these core substitution criteria while offering active product status and improved compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

B82732R2901B030 (EPCOS - TDK Electronics B82732 Series)

This substitute provides active product status with ROHS3 compliance and international safety certifications (ENEC, UR, VDE). The 900mA current rating falls below the original 1A specification, making this option suitable only for applications where the actual operating current does not exceed 900mA. The increased DC resistance of 750mOhm compared to the original 515mOhm should be evaluated for thermal performance in the target application. Compact dimensions (24.00mm × 16.50mm × 24.60mm height) offer space advantages for constrained layouts.

B82734R2172B030 (EPCOS - TDK Electronics B82734 Series)

This substitute exceeds the original current rating at 1.7A and provides superior DC resistance performance at 320mOhm typical, resulting in lower power dissipation. Active product status, ROHS3 compliance, and international safety certifications (ENEC, UR, VDE) ensure long-term availability and regulatory alignment. Dimensions of 32.50mm × 21.00mm × 31.00mm height are comparable to the original part, with width matching exactly at 21.00mm. This option provides the most direct functional upgrade path.

Frequently Asked Questions (FAQ)

Q: Can B82732R2901B030 be used as a direct replacement for ELF-18D656V?

A: B82732R2901B030 meets the core substitution criteria of 2-line configuration, through-hole mounting, and vertical 4-pin package. However, the 900mA current rating is below the original 1A specification. This substitute is suitable only if the actual circuit current does not exceed 900mA. The increased DC resistance of 750mOhm versus 515mOhm must be evaluated for thermal impact.

Q: Which substitute part offers the best performance match?

A: B82734R2172B030 provides the closest performance alignment, with a 1.7A current rating that exceeds the original 1A specification and improved DC resistance of 320mOhm compared to the original 515mOhm. Physical dimensions are nearly identical, with matching width at 21.00mm.

Q: Are there mechanical compatibility concerns with these substitutes?

A: B82732R2901B030 has reduced dimensions (24.00mm × 16.50mm × 24.60mm height), which may require PCB layout verification for clearance. B82734R2172B030 dimensions (32.50mm × 21.00mm × 31.00mm height) are comparable to the original, with only minor length and height variations that typically do not require layout changes.

Q: What compliance advantages do the substitute parts offer?

A: Both EPCOS - TDK Electronics substitutes are ROHS3 compliant and carry international safety certifications (ENEC, UR, VDE), whereas the original ELF-18D656V is RoHS non-compliant. Both substitutes are active products with established supply chains, addressing the obsolescence status of the original part.

Q: How do the inductance specifications compare?

A: The original ELF-18D656V does not specify inductance in the provided data. Both substitute parts specify 27 mH @ 10 kHz, providing defined inductance performance for filtering applications.