ELF-21N010A Common Mode Choke Equivalent & Substitute Parts

Part Overview

The ELF-21N010A is a 2-line common mode choke manufactured by Panasonic Electronic Components, rated for 1A maximum current with 500mOhm typical DC resistance. This through-hole component is designed for power line filtering applications in electronic equipment. The part is currently obsolete, making equivalent substitutes necessary for new designs, repairs, and ongoing production support.

Substiute Parts

ELF-21N010A

Panasonic Electronic ComponentsIn Stock: 632ELF-21N010A Datasheet

Current PartRFQ

EV28-1.0-02-36M

Schaffner EMC Inc.In Stock: 1102EV28-1.0-02-36M Datasheet

SimilarRFQ

SS26V-R080470

KEMETIn Stock: 1173SS26V-R080470 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELF-21N010A are qualified based on the following critical parameters:

• Number of Lines: Must be 2-line configuration
• Current Rating: Must support minimum 1A operation
• Mounting Type: Must be through-hole
• Package Configuration: Must be vertical, 4-pin package
• DC Resistance: Must be compatible with 500mOhm baseline (allowing typical variations in active components)

The two qualified substitutes meet these core electrical and mechanical requirements while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

EV28-1.0-02-36M (Schaffner EMC Inc.) is the primary substitute for applications requiring full electrical compatibility. This part maintains the 1A current rating and provides lower DCR variance (591mOhm vs. 500mOhm). It is ROHS3 compliant and carries active product status, ensuring long-term availability and supply chain stability. The 250V AC rating and -25°C to 100°C operating temperature range support standard industrial power line filtering applications.

SS26V-R080470 (KEMET) is an alternative substitute suitable for applications where the 800mA current rating is acceptable. This part offers the lowest DCR at 1Ohm and the widest operating temperature range (-25°C to 120°C). ROHS3 compliance and active status provide equivalent supply assurance. The slightly higher DCR may require thermal evaluation in high-current edge cases.

Both substitutes are ROHS3 compliant and active products, addressing the obsolescence of the ELF-21N010A while meeting modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can EV28-1.0-02-36M directly replace ELF-21N010A in existing designs?

A: Yes. Both parts share identical 2-line configuration, 1A current rating, through-hole mounting, and vertical 4-pin package. The 591mOhm DCR is within acceptable tolerance of the 500mOhm baseline. PCB layout verification is required due to dimensional differences (29.20mm L x 21.00mm W vs. 20.00mm L x 32.00mm W).

Q: Is SS26V-R080470 suitable for 1A applications?

A: SS26V-R080470 is rated for 800mA maximum current, which is below the 1A requirement of the original part. This substitute is appropriate only for applications operating at or below 800mA. Verify actual circuit current draw before selection.

Q: What are the dimensional constraints for substitution?

A: The ELF-21N010A occupies 20.00mm L x 32.00mm W x 30.00mm H. EV28-1.0-02-36M requires 29.20mm L x 21.00mm W x 35.70mm H, and SS26V-R080470 requires 26.00mm L x 20.50mm W x 30.50mm H. PCB layout must accommodate these footprint and height variations.

Q: Are both substitutes RoHS compliant?

A: Yes. Both EV28-1.0-02-36M and SS26V-R080470 are ROHS3 compliant, addressing the RoHS non-compliant status of the obsolete ELF-21N010A.

Q: What is the inductance specification for substitutes?

A: EV28-1.0-02-36M provides 36 mH @ 400 Hz. SS26V-R080470 provides 47 mH @ 1 kHz. The original ELF-21N010A inductance value was not provided in available documentation. Verify inductance requirements against circuit specifications before final selection.