ELF-14M040E Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-14M040E is a 2-line common mode choke (CMC) manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring 400mA current handling capability. This component features a typical DC resistance of 1.35Ohm and is housed in a vertical 4-pin configuration with dimensions of 16.00mm × 14.50mm × 12.00mm maximum height.

The ELF-14M040E has reached obsolete product status. Identifying functionally equivalent substitute components is necessary to maintain design continuity and ensure continued availability for production and repair applications.

Substiute Parts

ELF-14M040E

Panasonic Electronic ComponentsIn Stock: 1001ELF-14M040E Datasheet

Current PartRFQ

B82730G3401A020

EPCOS - TDK ElectronicsIn Stock: 702B82730G3401A020 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELF-14M040E is determined by the following critical parameters:

• Number of Lines: Must be 2-line configuration
• Current Rating: Must support minimum 400mA
• Mounting Type: Must be through-hole compatible
• Package Pin Configuration: Must accommodate 4-pin through-hole layout
• Physical Envelope: Dimensions must be compatible with PCB layout constraints
• DC Resistance: Should remain within acceptable operating parameters for the application

The B82730G3401A020 manufactured by EPCOS - TDK Electronics meets these substitution criteria. Both components are 2-line common mode chokes rated for 400mA through-hole operation with 4-pin configurations and comparable physical dimensions. The substitute maintains functional equivalence within the specified electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The B82730G3401A020 is the identified substitute for the obsolete ELF-14M040E based on matching electrical and mechanical specifications. Key selection considerations:

Product Status: The substitute component maintains active product status with EPCOS - TDK Electronics, ensuring long-term availability and supply chain continuity compared to the obsolete Panasonic part.

Regulatory Compliance: The B82730G3401A020 is ROHS3 compliant, whereas the original ELF-14M040E is RoHS non-compliant. This compliance status may be required for applications subject to current environmental regulations.

Certifications: The substitute carries UR and VDE approvals, providing additional regulatory validation for power line filtering applications.

Physical Compatibility: Both components share identical height (12.00mm) and comparable length and width dimensions. The substitute features a horizontal pin configuration versus the vertical configuration of the original part. PCB layout verification is necessary to confirm pin orientation compatibility.

Electrical Parameters: Both components are rated for 400mA operation. The substitute exhibits higher DC resistance (2.4Ohm typical versus 1.35Ohm typical), which may result in increased power dissipation in the application circuit and should be evaluated against thermal design requirements.

Frequently Asked Questions (FAQ)

Q: Can the B82730G3401A020 be used as a direct replacement for the ELF-14M040E?

A: The B82730G3401A020 is functionally equivalent based on 2-line configuration, 400mA current rating, through-hole mounting, and 4-pin package type. However, the horizontal pin orientation differs from the vertical orientation of the original part. PCB layout compatibility must be confirmed before implementation.

Q: What is the impact of the higher DC resistance in the substitute part?

A: The B82730G3401A020 has a typical DC resistance of 2.4Ohm compared to 1.35Ohm in the ELF-14M040E. This 0.65Ohm increase will result in higher resistive losses and power dissipation at 400mA operation. Thermal analysis of the application circuit is required to ensure the substitute remains within acceptable operating conditions.

Q: Are there compliance differences between the two parts?

A: Yes. The ELF-14M040E is RoHS non-compliant, while the B82730G3401A020 is ROHS3 compliant. The substitute also carries UR and VDE certifications. These compliance differences may be relevant for applications subject to environmental or safety regulations.

Q: What are the physical dimension differences?

A: The ELF-14M040E measures 16.00mm × 14.50mm × 12.00mm (L × W × H). The B82730G3401A020 measures 16.50mm × 15.00mm × 12.00mm. The height is identical; length and width are slightly larger in the substitute. PCB layout space must accommodate these dimensional differences.

Q: Does the substitute provide additional electrical specifications?

A: Yes. The B82730G3401A020 specifies 300V AC voltage rating and -40°C to 125°C operating temperature range, neither of which are provided for the original ELF-14M040E. These specifications may be relevant for applications requiring defined environmental or voltage operating parameters.

Q: What is the difference between vertical and horizontal pin configurations?

A: Vertical configuration orients the component body perpendicular to the PCB surface with pins extending downward. Horizontal configuration orients the component body parallel to the PCB surface. Pin orientation affects PCB layout, component spacing, and assembly procedures. Verify that the substitute's horizontal configuration is compatible with the existing PCB design.