ELF-18D608 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-18D608 is a 1 mH Common Mode Choke (CMC) manufactured by Panasonic Electronic Components, designed for 2-line through-hole applications with a maximum current rating of 3.4A and DC resistance of 45mOhm (Typ). This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part operates across a temperature range of -20°C to 105°C and carries a 250V AC voltage rating.

Substiute Parts

ELF-18D608

Panasonic Electronic ComponentsIn Stock: 1184ELF-18D608 Datasheet

Current PartRFQ

B82732R2142B030

EPCOS - TDK ElectronicsIn Stock: 3515B82732R2142B030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-18D608 is determined by the following critical parameters:

Functional Compatibility Criteria:

• Number of Lines: Must remain 2-line configuration
• Mounting Type: Must be Through Hole
• Package / Case: Must be Vertical, 4 PC Pin
• Voltage Rating - AC: Must meet or exceed 250V

Performance Tolerance Parameters:

• Inductance @ Frequency: Substitute inductance values must be compatible with circuit design requirements; higher inductance values (10 mH vs. 1 mH) represent a significant change in filtering characteristics
• Current Rating (Max): Substitute must support the application's current demands; lower current ratings (1.4A vs. 3.4A) restrict application scope
• DC Resistance (DCR): Higher DCR values (300mOhm vs. 45mOhm) increase power dissipation and heat generation
• Operating Temperature: Substitute temperature range must encompass or exceed the original specification

Compliance Considerations:

• RoHS Status: Active substitutes should meet current RoHS3 compliance requirements
• Approval Agencies: Presence of certifications (ENEC, UR, VDE) indicates suitability for regulated applications

Parameter Comparison

Engineering Selection Recommendations

The B82732R2142B030 from EPCOS - TDK Electronics is listed as an active substitute for the obsolete ELF-18D608. Both components share identical mechanical form factors (Vertical, 4 PC Pin through-hole configuration) and AC voltage ratings (250V).

Compliance Advantage: The B82732R2142B030 is ROHS3 compliant and carries approvals from ENEC, UR, and VDE, making it suitable for regulated markets and modern procurement requirements. The ELF-18D608's RoHS non-compliance status limits its use in new designs.

Performance Trade-offs: The substitute exhibits significant differences in electrical characteristics. The inductance is 10 times higher (10 mH vs. 1 mH), measured at a different frequency (10 kHz vs. 1 kHz). The current rating is reduced to 1.4A (from 3.4A), and DC resistance increases to 300mOhm (from 45mOhm). These differences require circuit-level validation to confirm functional equivalence in the target application.

Temperature Range: The B82732R2142B030 provides an extended operating temperature range (-40°C to 125°C) compared to the original part (-20°C to 105°C), offering improved performance in extreme thermal environments.

Frequently Asked Questions (FAQ)

Q: Can the B82732R2142B030 be used as a direct drop-in replacement for the ELF-18D608?

A: Both parts share identical mechanical packaging (Vertical, 4 PC Pin through-hole) and AC voltage ratings (250V), allowing physical installation in the same footprint. However, the significant differences in inductance (1 mH vs. 10 mH), current rating (3.4A vs. 1.4A), and DC resistance (45mOhm vs. 300mOhm) require circuit validation to confirm functional compatibility.

Q: What are the key differences between these two Common Mode Chokes?

A: The primary differences are: (1) Inductance value and measurement frequency differ substantially, affecting filtering performance; (2) Current rating is lower in the substitute, restricting maximum application current; (3) DC resistance is significantly higher, increasing power dissipation; (4) Operating temperature range is extended in the substitute; (5) RoHS compliance status differs, with the substitute meeting current ROHS3 requirements.

Q: Why is the ELF-18D608 listed as obsolete?

A: The ELF-18D608 is classified as obsolete by Panasonic Electronic Components, indicating it is no longer in active production. This status necessitates identification of alternative components for new designs and ongoing procurement support.

Q: Does the substitute meet the same compliance requirements?

A: The B82732R2142B030 exceeds the compliance profile of the original part. It is ROHS3 compliant and carries certifications from ENEC, UR, and VDE. The ELF-18D608 is RoHS non-compliant, making the substitute more suitable for regulated applications and modern supply chain requirements.

Q: What should be verified before implementing the B82732R2142B030 as a substitute?

A: Circuit-level validation is required to confirm that the higher inductance value (10 mH), reduced current rating (1.4A), and increased DC resistance (300mOhm) are compatible with the target application's filtering requirements, current demands, and thermal constraints.