ELJ-FCR39KF Equivalent & Substitute Parts

Part Overview

The ELJ-FCR39KF is a 390 nH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 160 mA maximum current with 950mOhm DC resistance. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The part is packaged in a 1008 (2520 Metric) surface mount form factor with MSL 1 moisture sensitivity rating.

Substiute Parts

ELJ-FCR39KF

Panasonic Electronic ComponentsIn Stock: 972ELJ-FCR39KF Datasheet

Current PartRFQ

NLV25T-R39J-PF

TDK CorporationIn Stock: 17992NLV25T-R39J-PF Datasheet

DirectRFQ

1008-391K

API Delevan Inc.In Stock: 10241008-391K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELJ-FCR39KF is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 390 nH (exact match required)
• Package / Case: 1008 (2520 Metric) surface mount form factor
• Shielding configuration: Unshielded
• Mounting type: Surface mount

Secondary Compatibility Parameters:

• Current rating must meet or exceed 160 mA minimum requirement
• DC resistance must not exceed application circuit limits
• Operating temperature range must encompass -20°C ~ 85°C minimum
• Tolerance specification must be compatible with circuit design requirements

Two substitute parts meet these criteria with varying performance characteristics and availability status.

Parameter Comparison

Engineering Selection Recommendations

NLV25T-R39J-PF (TDK Corporation) is the preferred direct substitute. This part maintains the standard 1008 (2520 Metric) package geometry, exceeds the current rating requirement (375 mA vs. 160 mA), and provides superior DC resistance performance (650mOhm vs. 950mOhm). The part carries ROHS3 compliance and REACH affected status, meeting modern regulatory requirements. Operating temperature range extends to -40°C ~ 105°C, providing margin beyond the original specification. Product status is "Not For New Designs," indicating limited future availability but current stock presence (17,920 pcs).

1008-391K (API Delevan Inc.) is an alternative substitute with active product status and highest current capacity (913 mA) and lowest DC resistance (180mOhm). However, this part uses a nonstandard package geometry (0.105" L x 0.095" W vs. 0.098" L x 0.079" W), which may require PCB layout modification. RoHS non-compliance status may restrict use in regulated applications. This option provides the longest operating temperature range (-55°C ~ 125°C) and highest Q factor (40 @ 25MHz).

Frequently Asked Questions (FAQ)

Q: Can NLV25T-R39J-PF directly replace ELJ-FCR39KF without PCB modification?

A: Yes. Both parts use identical 1008 (2520 Metric) package dimensions and surface mount configuration. Footprint compatibility is confirmed. The substitute provides improved electrical performance with lower DC resistance and higher current rating.

Q: What is the impact of different DC resistance values on circuit performance?

A: DC resistance affects power dissipation and impedance characteristics. NLV25T-R39J-PF (650mOhm) reduces dissipation compared to ELJ-FCR39KF (950mOhm). 1008-391K (180mOhm) provides minimal dissipation but requires package geometry verification for PCB compatibility.

Q: Is tolerance difference between ±10% and ±5% significant for this application?

A: Tolerance impact depends on circuit requirements. NLV25T-R39J-PF offers tighter tolerance (±5%), providing better inductance consistency. Verify whether your circuit design requires this specification level.

Q: Why does 1008-391K have a nonstandard package designation?

A: The part dimensions (0.105" L x 0.095" W) deviate from standard 1008 (2520 Metric) specifications (0.098" L x 0.079" W). Confirm PCB footprint compatibility before selection.

Q: What is the significance of product status classifications?

A: Obsolete status (ELJ-FCR39KF) indicates discontinued production. "Not For New Designs" (NLV25T-R39J-PF) indicates limited future support. Active status (1008-391K) ensures ongoing availability and production support.

Q: Are there compliance considerations for substitute selection?

A: NLV25T-R39J-PF carries ROHS3 compliance and REACH affected status. 1008-391K is RoHS non-compliant. Verify regulatory requirements for your application before final selection.