ELJ-FC2R2KF Equivalent & Substitute Parts

Part Overview

The ELJ-FC2R2KF is a 2.2 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 155 mA maximum current with 1.05Ohm maximum DC resistance. This surface mount component is packaged in the 1008 (2520 Metric) form factor and operates across the temperature range of -20°C to 85°C.

The product status is listed as Obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and production continuity. Substitute components must maintain electrical performance within acceptable tolerances while meeting current manufacturing and compliance standards.

Substiute Parts

ELJ-FC2R2KF

Panasonic Electronic ComponentsIn Stock: 1214ELJ-FC2R2KF Datasheet

Current PartRFQ

NLV25T-2R2J-PF

TDK CorporationIn Stock: 31277NLV25T-2R2J-PF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-FC2R2KF is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 2.2 µH
• Package / Case: 1008 (2520 Metric)
• Mounting Type: Surface Mount
• Shielding configuration: Unshielded

Allowable Parameter Variations:

• Current Rating: Substitute must equal or exceed 155 mA
• DC Resistance: Substitute must not exceed 1.05Ohm maximum
• Operating Temperature Range: Substitute must cover or exceed -20°C ~ 85°C
• Inductance Tolerance: Substitute tolerance must be equal to or tighter than ±10%

The NLV25T-2R2J-PF from TDK Corporation meets all mandatory matching criteria and satisfies allowable parameter variations, qualifying as a direct electrical and mechanical substitute.

Parameter Comparison

Engineering Selection Recommendations

The NLV25T-2R2J-PF qualifies as a direct substitute for the obsolete ELJ-FC2R2KF based on electrical and mechanical parameter alignment. The substitute component provides improved specifications in several areas: higher current rating (200 mA vs. 155 mA), tighter inductance tolerance (±5% vs. ±10%), extended operating temperature range (-40°C ~ 105°C vs. -20°C ~ 85°C), and higher self-resonant frequency (105MHz vs. 80MHz).

The NLV25T-2R2J-PF carries RoHS3 compliance and REACH Affected status, meeting current regulatory requirements. The product status is listed as Not For New Designs, indicating that while functionally suitable, long-term availability should be evaluated for new production programs.

The increased DC resistance (1.55Ohm vs. 1.05Ohm) represents the primary electrical trade-off and must be evaluated within the specific circuit application to ensure thermal and performance requirements remain satisfied.

Frequently Asked Questions (FAQ)

Q: Can the NLV25T-2R2J-PF be used as a direct replacement for the ELJ-FC2R2KF?

A: Yes. Both components share identical inductance value (2.2 µH), package form factor (1008 / 2520 Metric), mounting type (Surface Mount), and shielding configuration (Unshielded). Electrical parameters of the substitute meet or exceed the original component specifications.

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

A: The NLV25T-2R2J-PF exhibits 1.55Ohm maximum DC resistance compared to 1.05Ohm in the ELJ-FC2R2KF. This 0.50Ohm increase will result in higher resistive losses and heat dissipation at rated current. Circuit thermal analysis is required to confirm acceptability within the application.

Q: Are there physical compatibility concerns between these components?

A: Both components use identical length and width dimensions (0.098" L x 0.079" W / 2.50mm x 2.00mm). The substitute has a maximum seated height of 0.075" (1.90mm) versus 0.071" (1.80mm) for the original. This 0.004" (0.10mm) difference is negligible for standard PCB assembly and should not create clearance issues.

Q: What is the difference in current rating between these parts?

A: The NLV25T-2R2J-PF is rated for 200 mA maximum current, exceeding the ELJ-FC2R2KF rating of 155 mA. This provides additional design margin and allows the substitute to handle higher current levels without saturation concerns.

Q: How do the inductance tolerances compare?

A: The ELJ-FC2R2KF specifies ±10% inductance tolerance, while the NLV25T-2R2J-PF provides tighter ±5% tolerance. The substitute offers improved inductance accuracy, which may benefit circuit performance in applications sensitive to inductance variation.

Q: What are the operating temperature considerations?

A: The ELJ-FC2R2KF operates from -20°C to 85°C, while the NLV25T-2R2J-PF extends this range to -40°C to 105°C. The substitute supports wider temperature extremes, providing greater flexibility for applications requiring extended thermal operating conditions.