ELJ-QF2N2DF Equivalent & Substitute Parts

Part Overview

The ELJ-QF2N2DF is a 2.2 nH unshielded multilayer ceramic inductor manufactured by Panasonic Electronic Components in the 0402 (1005 Metric) surface mount package. This component is rated for 400 mA maximum current with 90mOhm maximum DC resistance and operates across -40°C to 85°C. The product is currently obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

ELJ-QF2N2DF

Panasonic Electronic ComponentsIn Stock: 801ELJ-QF2N2DF Datasheet

Current PartRFQ

MLG1005S2N2ST000

TDK CorporationIn Stock: 155472MLG1005S2N2ST000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-QF2N2DF is determined by the following critical parameters:

• Inductance Value: Must be 2.2 nH with tolerance ±0.3nH
• Package / Case: Must be 0402 (1005 Metric) surface mount
• Core Type: Ceramic, unshielded construction
• Physical Dimensions: 0.039" L x 0.020" W (1.00mm x 0.50mm), Height 0.022" (0.55mm) maximum

The substitute part MLG1005S2N2ST000 meets these core substitution criteria. While the substitute exhibits higher current rating (900 mA vs 400 mA), higher DC resistance (150mOhm vs 90mOhm), and extended operating temperature range (-55°C ~ 125°C vs -40°C ~ 85°C), these represent performance enhancements or extensions that do not prevent functional substitution in applications designed for the original component.

Parameter Comparison

Engineering Selection Recommendations

The MLG1005S2N2ST000 (TDK Corporation) is a direct functional substitute for the obsolete ELJ-QF2N2DF. The substitute maintains identical inductance value, tolerance, package dimensions, and mounting configuration. Both components share REACH Unaffected status and EAR99 export classification.

The TDK substitute is currently in active production status with substantial inventory availability (155,400 pcs), whereas the original Panasonic component is obsolete. The substitute's RoHS3 compliance provides additional regulatory alignment for modern manufacturing environments.

The higher DC resistance specification of the substitute (150mOhm vs 90mOhm) and lower Q factor (7 vs 10 at 100MHz) represent measurable performance differences that must be evaluated within the context of the specific application circuit. The extended operating temperature range (-55°C ~ 125°C) and higher current rating (900 mA) of the substitute provide operational margins beyond the original component specifications.

Frequently Asked Questions (FAQ)

Q: Can MLG1005S2N2ST000 be used as a direct replacement for ELJ-QF2N2DF?

A: Yes, MLG1005S2N2ST000 meets the core substitution criteria: identical 2.2 nH inductance with ±0.3nH tolerance, 0402 (1005 Metric) package, unshielded ceramic core, and identical physical dimensions. Both components are surface mount devices with MSL 1 rating.

Q: What are the key differences between these components?

A: The substitute exhibits higher DC resistance (150mOhm vs 90mOhm), lower Q factor at 100MHz (7 vs 10), higher current rating (900 mA vs 400 mA), and extended operating temperature range (-55°C ~ 125°C vs -40°C ~ 85°C). The substitute is currently in active production.

Q: Are there packaging differences?

A: Both components use identical 0402 (1005 Metric) surface mount packages with matching physical dimensions (0.039" L x 0.020" W, 0.022" maximum height). The substitute is supplied in Tape & Reel packaging format.

Q: What is the regulatory compliance status?

A: Both components are REACH Unaffected and classified as EAR99 for export purposes. The substitute carries RoHS3 compliance certification.

Q: Should DC resistance differences affect my design decision?

A: The 60mOhm difference in maximum DC resistance (90mOhm vs 150mOhm) must be evaluated within your circuit's current and thermal requirements. Applications operating at or near the 400 mA rating of the original component should assess the impact of increased resistive losses in the substitute.