ELJ-FCR56KF Equivalent & Substitute Parts

Part Overview

The ELJ-FCR56KF is a 560 nH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 150 mA maximum current with 1.1Ohm maximum DC resistance. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part is packaged in a 1008 (2520 Metric) surface mount form factor suitable for high-frequency applications up to 155 MHz self-resonant frequency.

Substiute Parts

ELJ-FCR56KF

Panasonic Electronic ComponentsIn Stock: 1211ELJ-FCR56KF Datasheet

Current PartRFQ

1008-561K

API Delevan Inc.In Stock: 9261008-561K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-FCR56KF is determined by the following critical parameters:

• Inductance Value: 560 nH (±10% tolerance maintained)
• Shielding Configuration: Unshielded
• Mounting Type: Surface Mount
• Current Rating: Minimum 150 mA
• DC Resistance: Maximum 1.1Ohm
• Self-Resonant Frequency: Minimum 155 MHz
• Operating Temperature Range: Must support -20°C ~ 85°C minimum

The substitute part 1008-561K from API Delevan Inc. meets these core electrical and mechanical requirements. While the substitute exhibits different physical dimensions and higher current capability, the inductance value, tolerance, shielding type, and frequency characteristics remain compatible with the original specification.

Parameter Comparison

Engineering Selection Recommendations

The 1008-561K from API Delevan Inc. is an active product suitable for replacing the obsolete ELJ-FCR56KF in applications requiring 560 nH inductance at surface mount configuration. The substitute part provides superior electrical performance across all measured parameters: higher current rating (808 mA vs. 150 mA), lower DC resistance (230mOhm vs. 1.1Ohm), higher self-resonant frequency (195 MHz vs. 155 MHz), and extended operating temperature range (-55°C ~ 125°C vs. -20°C ~ 85°C).

Physical dimensions differ between the two parts. The substitute measures 0.105" L x 0.095" W (2.66mm x 2.41mm) with 0.095" seated height, compared to the original 0.098" L x 0.079" W (2.50mm x 2.00mm) with 0.071" seated height. PCB layout verification is required to confirm mechanical fit within the target application.

The substitute part is RoHS non-compliant and REACH unaffected. Compliance requirements for the target application must be evaluated independently.

Frequently Asked Questions (FAQ)

Q: Can the 1008-561K directly replace the ELJ-FCR56KF without circuit modification?

A: Electrical substitution is valid based on matching inductance (560 nH), tolerance (±10%), and frequency characteristics. The substitute's superior current rating and lower DC resistance do not degrade circuit performance. Physical PCB layout must be verified due to dimensional differences.

Q: What is the significance of the different DC resistance values?

A: The ELJ-FCR56KF specifies 1.1Ohm maximum DC resistance, while the 1008-561K specifies 230mOhm maximum. Lower DC resistance reduces power dissipation and heat generation in the inductor. This represents an improvement in the substitute part.

Q: Why does the substitute part have a nonstandard package designation?

A: Both parts are surface mount inductors in the 1008 form factor (2520 Metric). The API Delevan part is designated as "Nonstandard" in the package classification field, though physical dimensions remain compatible with standard 1008 footprints. Verification with PCB design tools is recommended.

Q: Are there temperature range implications for substitution?

A: The ELJ-FCR56KF operates from -20°C to 85°C, while the 1008-561K operates from -55°C to 125°C. The substitute supports a wider temperature range, making it suitable for applications with extended thermal requirements. No derating is necessary if the original application operates within -20°C to 85°C.

Q: What is the difference in Q factor between the two parts?

A: The ELJ-FCR56KF exhibits Q of 25 at 25.2 MHz, while the 1008-561K exhibits Q of 40 at 25 MHz. Higher Q indicates lower losses and better frequency selectivity. The substitute provides superior performance in this parameter.

Q: Does the substitute part meet RoHS compliance?

A: The 1008-561K is marked as RoHS non-compliant. If RoHS compliance is required for the target application, alternative parts must be evaluated or compliance exemptions must be obtained.