LF2020NP-392 Equivalent & Substitute Parts

Part Overview

The LF2020NP-392 is a common mode choke (CMC) manufactured by Sumida America Components Inc., designed for power line filtering applications. This through-hole component provides 3.9 mH inductance at 1 kHz with a maximum current rating of 1A and DC resistance of 410 mOhm. The part is currently active in production and ROHS3 compliant, making it suitable for modern electronic equipment requiring electromagnetic interference (EMI) suppression on two-line power distribution circuits.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter ranges for common mode choke applications.

Substiute Parts

LF2020NP-392

Sumida America Components Inc.In Stock: 996LF2020NP-392 Datasheet

Current PartRFQ

EV20-1.0-02-3M9

Schaffner EMC Inc.In Stock: 1392EV20-1.0-02-3M9 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LF2020NP-392 is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Inductance value: 3.9 mH (measured at specified frequency)
• Current rating: 1A maximum
• DC resistance: Must not exceed 410 mOhm
• Number of lines: 2-line configuration
• Filter type: Power line application

Mechanical Compatibility Criteria:

• Mounting type: Through hole
• Package configuration: Vertical, 4 pin
• Physical dimensions: Compatible with 0.827" L × 0.638" W footprint and 0.886" maximum height

Compliance Requirements:

• RoHS3 compliance mandatory
• ECCN classification: EAR99

The substitute part EV20-1.0-02-3M9 meets these criteria with equivalent inductance, current rating, and mechanical form factor, while demonstrating improved DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

LF2020NP-392 (Primary Selection): Select this part when the original design specification calls for the Sumida LF series and inventory availability is confirmed. The part is active in production with 957 units in stock. ROHS3 compliance and EAR99 classification support standard procurement workflows.

EV20-1.0-02-3M9 (Substitute Selection): This Schaffner part functions as an electrical and mechanical equivalent with the following considerations:

• Inductance is specified at 400 Hz rather than 1 kHz; both measurements characterize the same 3.9 mH component value
• DC resistance of 168 mOhm (typical) is significantly lower than the 410 mOhm maximum of the primary part, resulting in reduced power dissipation
• AC voltage rating of 250 V is explicitly provided, whereas the primary part does not specify this parameter
• Operating temperature range of -25°C to 100°C is defined for the substitute
• Physical height is 1.024" (26.00 mm) compared to 0.886" (22.50 mm) for the primary part; verify clearance in vertical-constrained PCB layouts
• Higher inventory availability (1,346 units) supports supply chain continuity
• ROHS3 compliance and EAR99 classification match the primary part

Both parts maintain identical current rating (1A), number of lines (2), filter type (power line), mounting type (through hole), and package configuration (vertical, 4 pin).

Frequently Asked Questions (FAQ)

Q: Can EV20-1.0-02-3M9 replace LF2020NP-392 in all applications?

A: Electrical substitution is valid based on matching inductance (3.9 mH), current rating (1A), and 2-line configuration. Mechanical substitution requires verification of PCB layout clearance, as the Schaffner part has a maximum height of 1.024" compared to 0.886" for the Sumida part. Both parts are ROHS3 compliant and EAR99 classified.

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

A: Both measurements characterize the same 3.9 mH inductance value. The frequency difference reflects manufacturer test methodology and does not indicate different component performance. The inductance value itself is the critical parameter for circuit function.

Q: Does the lower DC resistance of the substitute part affect circuit operation?

A: The EV20-1.0-02-3M9 exhibits 168 mOhm typical DC resistance compared to 410 mOhm maximum for the LF2020NP-392. Lower resistance reduces power dissipation and heat generation, which is beneficial for thermal performance. This does not negatively impact circuit operation when the 1A current rating is observed.

Q: Are there dimensional constraints I should consider?

A: The Schaffner EV20-1.0-02-3M9 is 0.138" (3.50 mm) taller than the Sumida LF2020NP-392. Verify that PCB layout and enclosure design accommodate the maximum height of 1.024" (26.00 mm). Lateral dimensions (length and width) are nearly identical and present no compatibility issues.

Q: What compliance certifications apply to both parts?

A: Both the LF2020NP-392 and EV20-1.0-02-3M9 are ROHS3 compliant and classified as EAR99 for export control purposes. Both parts carry Moisture Sensitivity Level (MSL) ratings appropriate for standard handling and storage.

Q: Is the 250V AC rating of the substitute part relevant to my application?

A: The EV20-1.0-02-3M9 specifies a 250V AC voltage rating. The primary part (LF2020NP-392) does not provide explicit voltage rating data in the available parameters. If your circuit operates at or near 250V AC, the Schaffner part's explicit rating provides documented compliance. For lower voltage applications, both parts are suitable.