ELF-18D650U Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-18D650U is a 2-line common mode choke manufactured by Panasonic Electronic Components, designed for through-hole mounting applications with a 700mA current rating and 1.212Ohm typical DC resistance. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates in the V series and maintains RoHS non-compliant status with MSL Level 1 rating.

Substiute Parts

ELF-18D650U

Panasonic Electronic ComponentsIn Stock: 997ELF-18D650U Datasheet

Current PartRFQ

B82734R2132B030

EPCOS - TDK ElectronicsIn Stock: 2856B82734R2132B030 Datasheet

SimilarRFQ

B82734R2701B030

EPCOS - TDK ElectronicsIn Stock: 756B82734R2701B030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELF-18D650U are qualified based on the following critical parameters:

• Number of Lines: Must be 2-line configuration
• Mounting Type: Must be through-hole
• Package / Case: Must be vertical, 4 PC pin configuration
• Current Rating: Must support minimum 700mA operation
• DC Resistance: Must be compatible with circuit requirements (1.212Ohm reference)

The two substitute parts listed (B82734R2132B030 and B82734R2701B030) both meet these core mechanical and electrical compatibility criteria. Both are manufactured by EPCOS - TDK Electronics from the active B82734 series, ensuring long-term availability and design continuity.

Parameter Comparison

Engineering Selection Recommendations

Both B82734R2132B030 and B82734R2701B030 are active products from EPCOS - TDK Electronics with ROHS3 compliance and international certifications (ENEC, UR, VDE), providing superior compliance status compared to the obsolete ELF-18D650U.

B82734R2701B030 provides the closest electrical match to the original part, with identical 700mA current rating and comparable 1.45Ohm DCR (versus 1.212Ohm original). This part is recommended for direct replacement in existing designs where current and resistance specifications are critical.

B82734R2132B030 offers higher current capacity (1.3A) and lower DCR (560mOhm), suitable for applications requiring improved thermal performance or higher current headroom. This part is appropriate for new designs or upgrades where the enhanced specifications provide system benefits.

Both substitute parts feature identical 4-pin vertical through-hole packaging and operate across -40°C to 125°C temperature range with 250V AC voltage rating. Dimensional differences (32.50mm length versus 29.00mm original, 31.00mm height versus 34.60mm original) require PCB layout verification for board space compatibility.

Frequently Asked Questions (FAQ)

Q: Can B82734R2132B030 and B82734R2701B030 be used interchangeably with ELF-18D650U?

A: Both parts meet the core substitution criteria (2-line, through-hole, 4-pin vertical package, 700mA+ current rating). However, they differ in inductance values, DCR, and physical dimensions. Selection depends on specific circuit requirements for inductance and resistance characteristics.

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

A: B82734R2132B030 provides 47mH inductance with 560mOhm DCR and 1.3A current rating. B82734R2701B030 provides 68mH inductance with 1.45Ohm DCR and 700mA current rating. The choice depends on whether your circuit requires higher current capacity or specific inductance values.

Q: Are there PCB layout considerations when switching from ELF-18D650U to substitute parts?

A: Yes. The substitute parts are slightly larger (32.50mm length, 31.00mm height) compared to the original (29.00mm length, 34.60mm height). Verify that your PCB layout accommodates these dimensional changes before implementation.

Q: What compliance advantages do the substitute parts offer?

A: Both B82734R2132B030 and B82734R2701B030 are ROHS3 compliant with active product status, compared to the obsolete, RoHS non-compliant ELF-18D650U. Both carry international certifications (ENEC, UR, VDE) and operate across -40°C to 125°C with 250V AC rating.

Q: Which substitute part should I select for a new design?

A: For new designs, B82734R2701B030 is recommended as the primary choice due to matching current rating (700mA) and comparable DCR (1.45Ohm) to the original. B82734R2132B030 is suitable if your application benefits from higher current capacity (1.3A) and lower resistance characteristics.