ELF-18D656D Common Mode Choke Equivalent & Substitute Parts

Part Overview

The Panasonic ELF-18D656D is a 2-line common mode choke (CMC) designed for power line filtering applications with a maximum current rating of 1.3A and through-hole mounting. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across a temperature range of -20°C to 105°C and is packaged in a vertical 4-pin configuration with RoHS non-compliant status.

Substiute Parts

ELF-18D656D

Panasonic Electronic ComponentsIn Stock: 681ELF-18D656D Datasheet

Current PartRFQ

B82732R2112B030

EPCOS - TDK ElectronicsIn Stock: 2502B82732R2112B030 Datasheet

SimilarRFQ

B82734R2132B030

EPCOS - TDK ElectronicsIn Stock: 2856B82734R2132B030 Datasheet

SimilarRFQ

B82734R2232B030

EPCOS - TDK ElectronicsIn Stock: 2058B82734R2232B030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ELF-18D656D is determined by the following critical parameters:

• Number of Lines: Must remain 2-line configuration for direct substitution
• Mounting Type: Must be through-hole to maintain PCB compatibility
• Package / Case: Must be vertical 4-pin configuration
• Current Rating: Substitute must support minimum 1.3A or higher
• Filter Type: Must be power line common mode choke
• Operating Temperature Range: Substitute must cover or exceed the operating envelope

The three EPCOS - TDK Electronics parts listed below meet these core substitution criteria while offering improved product status (active) and enhanced compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

B82734R2132B030 is the primary substitute for the ELF-18D656D. This part maintains the exact current rating of 1.3A, supports the same 2-line configuration and through-hole mounting, and provides ROHS3 compliance with international certifications (ENEC, UR, VDE). The operating temperature range of -40°C to 125°C exceeds the original specification. Physical dimensions are slightly larger (1.280" x 0.827" vs. 1.142" x 0.827"), requiring PCB layout verification.

B82734R2232B030 is suitable for applications requiring higher current capacity (2.3A) with lower DC resistance (185mOhm typical). This part offers the same mechanical compatibility and certifications as B82734R2132B030, with identical physical dimensions.

B82732R2112B030 is applicable only where current requirements can be reduced to 1.1A maximum. This part features the smallest physical footprint (0.945" L x 0.650" W) and lowest height (0.925"), making it suitable for space-constrained designs. The 15 mH inductance at 10 kHz differs from the unspecified inductance of the original part.

All three substitutes are active products with ROHS3 compliance and international safety certifications, providing improved long-term availability compared to the obsolete ELF-18D656D.

Frequently Asked Questions (FAQ)

Q: Can B82732R2112B030 directly replace ELF-18D656D in all applications?

A: No. B82732R2112B030 has a maximum current rating of 1.1A, which is below the 1.3A rating of the ELF-18D656D. This part is suitable only for applications where the actual operating current does not exceed 1.1A.

Q: What are the physical compatibility considerations for B82734R2132B030?

A: B82734R2132B030 maintains the same width (0.827") and pin configuration as the ELF-18D656D but is slightly longer (1.280" vs. 1.142") and shorter in height (1.220" vs. 1.362"). PCB layout must accommodate these dimensional changes, particularly the increased length.

Q: Why do the substitute parts have different inductance values?

A: The original ELF-18D656D specification does not include inductance data. The substitute parts provide measured inductance values: B82732R2112B030 and B82734R2232B030 at 15 mH @ 10 kHz, and B82734R2132B030 at 47 mH @ 10 kHz. Circuit performance depends on the required inductance for your application.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts are ROHS3 compliant, whereas the original ELF-18D656D is RoHS non-compliant. This represents an improvement in environmental and regulatory compliance.

Q: What certifications do the substitute parts carry?

A: All three EPCOS - TDK Electronics substitutes carry ENEC, UR, and VDE certifications, providing international safety and performance validation. The original part does not specify approval agencies.

Q: Can B82734R2232B030 be used in place of B82734R2132B030?

A: Yes, for applications where higher current capacity is acceptable. B82734R2232B030 supports 2.3A (versus 1.3A for B82734R2132B030) and features lower DC resistance (185mOhm typical vs. 560mOhm typical). Both parts share identical physical dimensions and certifications.