ELJ-QF2N4DF Equivalent & Substitute Parts

Part Overview

The ELJ-QF2N4DF is a 2.4 nH unshielded multilayer ceramic inductor manufactured by Panasonic Electronic Components in the 0402 (1005 Metric) surface mount package. This component is designed for high-frequency applications requiring low inductance values with controlled DC resistance characteristics. The part is currently obsolete, making identification of suitable substitute components essential for ongoing production and design requirements.

Substiute Parts

ELJ-QF2N4DF

Panasonic Electronic ComponentsIn Stock: 1198ELJ-QF2N4DF Datasheet

Current PartRFQ

MLG1005S2N4ST000

TDK CorporationIn Stock: 21779MLG1005S2N4ST000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-QF2N4DF is determined by the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 2.4 nH (with tolerance ±0.3 nH)
• Package / Case: 0402 (1005 Metric)
• Mounting Type: Surface Mount
• Core Material: Ceramic (unshielded)
• Inductance Frequency Test: 100 MHz

Allowable Parameter Variations:

• Current Rating: Substitute may equal or exceed the original 400 mA specification
• DC Resistance (DCR): Substitute may equal or be lower than the original 100 mOhm Max
• Operating Temperature Range: Substitute may equal or exceed the original -40°C ~ 85°C range
• Q Factor: Variation acceptable within the same inductance class
• Self Resonant Frequency: Variation acceptable within the same inductance class

The MLG1005S2N4ST000 from TDK Corporation meets all mandatory matching parameters and provides enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The MLG1005S2N4ST000 is a direct substitute for the obsolete ELJ-QF2N4DF based on the following engineering criteria:

Electrical Compatibility: Both components maintain identical inductance values (2.4 nH) and tolerance specifications (±0.3 nH) at the 100 MHz test frequency. The substitute provides higher current rating capacity (800 mA versus 400 mA), which is advantageous for applications requiring margin above the original specification.

Mechanical Compatibility: Both components utilize identical 0402 (1005 Metric) surface mount packaging with matching physical dimensions (0.039" L x 0.020" W, 1.00mm x 0.50mm) and seated height (0.022" / 0.55mm maximum). Direct PCB footprint compatibility is confirmed.

Environmental & Compliance: The TDK substitute provides an extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C), offering broader environmental coverage. Both components maintain identical moisture sensitivity levels (MSL 1 - Unlimited), REACH status (REACH Unaffected), and export classification (EAR99). The substitute carries RoHS3 compliance certification.

Product Availability: The MLG1005S2N4ST000 is currently in active production status with substantial inventory availability (21,697 pieces), ensuring supply chain continuity for the obsolete ELJ-QF2N4DF.

Frequently Asked Questions (FAQ)

Q: Can the MLG1005S2N4ST000 be used as a direct replacement for the ELJ-QF2N4DF?

A: Yes. Both components share identical inductance values (2.4 nH ±0.3 nH), package specifications (0402 / 1005 Metric), and core material (ceramic unshielded). Physical dimensions and mounting characteristics are identical, enabling direct PCB footprint compatibility without layout modifications.

Q: What are the differences in electrical performance between these two inductors?

A: The primary electrical differences are: (1) Current Rating: MLG1005S2N4ST000 is rated for 800 mA versus 400 mA for the ELJ-QF2N4DF, providing additional current capacity margin; (2) DC Resistance: MLG1005S2N4ST000 has 150 mOhm Max versus 100 mOhm Max for the original, representing a 50 mOhm increase; (3) Q Factor at 100 MHz: MLG1005S2N4ST000 measures 7 versus 10 for the ELJ-QF2N4DF; (4) Self Resonant Frequency: MLG1005S2N4ST000 is 7 GHz versus 5.5 GHz for the original.

Q: Are there any temperature range considerations for substitution?

A: The MLG1005S2N4ST000 operates across -55°C ~ 125°C, which exceeds the original ELJ-QF2N4DF range of -40°C ~ 85°C. This extended range provides additional environmental margin and is suitable for applications requiring broader temperature coverage.

Q: Do both components have identical moisture sensitivity specifications?

A: Yes. Both the ELJ-QF2N4DF and MLG1005S2N4ST000 carry MSL 1 (Unlimited) ratings, indicating identical moisture sensitivity levels and handling requirements.

Q: What is the compliance status of the substitute component?

A: The MLG1005S2N4ST000 is RoHS3 compliant and maintains REACH Unaffected status, matching the regulatory profile of the original component. Both components are classified as EAR99 for export purposes.

Q: Is the substitute component currently available?

A: Yes. The MLG1005S2N4ST000 is in active production status with 21,697 pieces currently in stock, ensuring reliable supply chain availability compared to the obsolete ELJ-QF2N4DF.