ELF-18D210 Equivalent & Substitute Parts

Part Overview

The ELF-18D210 is a 18 mH Common Mode Choke (CMC) with 2-line configuration, rated for 500mA maximum current, designed for through-hole mounting applications. Manufactured by Panasonic Electronic Components, this component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring similar electromagnetic filtering characteristics.

Substiute Parts

ELF-18D210

Panasonic Electronic ComponentsIn Stock: 1209ELF-18D210 Datasheet

Current PartRFQ

EH20-0.5-02-18M

Schaffner EMC Inc.In Stock: 1201EH20-0.5-02-18M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELF-18D210 is determined by the following critical parameters:

• Inductance Value: 18 mH nominal inductance, with measurement frequency tolerance (1 kHz vs. 400 Hz acceptable for common mode filtering applications)
• Current Rating: 500mA maximum continuous current capacity
• Number of Lines: 2-line common mode configuration
• Voltage Rating: 250V AC minimum
• Mounting Configuration: Through-hole, 4-pin package
• Physical Compatibility: Footprint and height constraints for PCB integration

The EH20-0.5-02-18M from Schaffner EMC Inc. meets these substitution criteria with equivalent electrical performance and compatible mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The EH20-0.5-02-18M serves as a direct functional substitute for the obsolete ELF-18D210 based on equivalent electrical specifications: identical 18 mH inductance, 500mA current rating, 2-line configuration, and 250V AC voltage rating. The substitute component offers superior DC resistance (725mOhm vs. 1.271Ohm), reducing power dissipation in the filtering circuit.

The EH20-0.5-02-18M is classified as Active product status with ROHS3 compliance and REACH unaffected designation, providing regulatory alignment for new designs and long-term supply continuity. Physical dimensions are compatible with standard through-hole PCB layouts, though the horizontal pin configuration differs from the original vertical orientation. Height reduction (18.80mm vs. 20.00mm) provides additional design flexibility for space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the EH20-0.5-02-18M directly replace the ELF-18D210 without circuit modification?

A: Yes, the EH20-0.5-02-18M provides electrical equivalence for common mode filtering applications. The 18 mH inductance value, 500mA current rating, and 250V AC voltage specification are identical. The lower DC resistance of the substitute (725mOhm vs. 1.271Ohm) reduces power dissipation, which is beneficial. Pin configuration is compatible with standard 4-pin through-hole footprints, though physical orientation differs (horizontal vs. vertical).

Q: What is the significance of the inductance measurement frequency difference (1 kHz vs. 400 Hz)?

A: Both components are specified at their respective measurement frequencies, which is standard practice for common mode choke characterization. The 18 mH nominal value remains consistent across the frequency range relevant to power line filtering applications (50/60 Hz to several kHz). This difference does not affect substitution validity for typical EMI filtering circuits.

Q: Are there any compliance or regulatory differences between the two parts?

A: The ELF-18D210 is RoHS non-compliant, while the EH20-0.5-02-18M is ROHS3 compliant. For new designs or applications requiring regulatory compliance with RoHS3 standards, the Schaffner component is the appropriate selection. The EH20-0.5-02-18M is also REACH unaffected, providing additional regulatory assurance.

Q: How does the package orientation difference affect PCB layout?

A: The ELF-18D210 uses vertical pin configuration, while the EH20-0.5-02-18M uses horizontal configuration. Both are 4-pin through-hole packages compatible with standard PCB footprints. Layout adjustment may be required to accommodate the different pin orientation, but electrical performance remains equivalent.

Q: What is the operating temperature range consideration for substitution?

A: The ELF-18D210 operates from -20°C to 105°C, while the EH20-0.5-02-18M operates from -25°C to 100°C. The substitute provides lower minimum temperature operation (-25°C vs. -20°C) but slightly reduced maximum temperature (100°C vs. 105°C). For most industrial and commercial applications operating within 0°C to 70°C, both components are functionally equivalent.