ELJ-QF2N7DF Equivalent & Substitute Parts

Part Overview

The ELJ-QF2N7DF is a 2.7 nH unshielded multilayer ceramic inductor manufactured by Panasonic Electronic Components. This surface mount component is rated for 400 mA maximum current with 100mOhm maximum DC resistance in a 0402 (1005 Metric) package. The product is currently obsolete, making equivalent substitutes necessary for ongoing design requirements and production continuity.

Substiute Parts

ELJ-QF2N7DF

Panasonic Electronic ComponentsIn Stock: 996ELJ-QF2N7DF Datasheet

Current PartRFQ

MLG1005S2N7ST000

TDK CorporationIn Stock: 45472MLG1005S2N7ST000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MLG1005S2N7ST000 from TDK Corporation qualifies as a direct substitute based on the following critical parameters:

Matching Parameters:

• Inductance: 2.7 nH (identical)
• Inductance Tolerance: ±0.3nH (identical)
• Package / Case: 0402 (1005 Metric) (identical)
• Shielding: Unshielded (identical)
• Material - Core: Ceramic (compatible)
• Mounting Type: Surface Mount (identical)
• Size / Dimension: 0.039" L x 0.020" W (1.00mm x 0.50mm) (identical)
• Height - Seated (Max): 0.022" (0.55mm) (identical)

Allowable Parameter Variations:

• Current Rating: 800 mA (substitute exceeds 400 mA requirement)
• DC Resistance (Max): 150mOhm (substitute exceeds 100mOhm specification)
• Operating Temperature Range: -55°C ~ 125°C (substitute exceeds -40°C ~ 85°C requirement)
• Q @ 100MHz: 7 (substitute is lower than 10)
• Frequency - Self Resonant: 6GHz (substitute exceeds 5.5GHz specification)

The substitute part provides equal or superior electrical performance within the critical inductance and package parameters while maintaining mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The MLG1005S2N7ST000 is suitable for direct substitution of the obsolete ELJ-QF2N7DF based on the following factors:

Product Status: The ELJ-QF2N7DF is obsolete, while the MLG1005S2N7ST000 is active and maintains current production availability with 45,400 pieces in stock.

Compliance & Certifications: Both parts share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS codes (8504.50.8000). The MLG1005S2N7ST000 carries ROHS3 compliance certification.

Electrical Performance: The substitute part meets or exceeds all critical electrical specifications. The identical inductance value (2.7 nH) and tolerance (±0.3nH) ensure functional equivalence. The higher current rating (800 mA vs. 400 mA) and extended operating temperature range (-55°C ~ 125°C vs. -40°C ~ 85°C) provide additional design margin.

Mechanical Compatibility: Identical package dimensions, height, and mounting type ensure direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the MLG1005S2N7ST000 replace the ELJ-QF2N7DF in existing designs?

A: Yes. Both parts share identical inductance (2.7 nH), tolerance (±0.3nH), package (0402 / 1005 Metric), and physical dimensions. The substitute meets all critical electrical and mechanical requirements for direct substitution.

Q: What are the differences in current rating between these parts?

A: The ELJ-QF2N7DF is rated for 400 mA maximum current, while the MLG1005S2N7ST000 is rated for 800 mA. The substitute part provides double the current capacity, making it suitable for applications requiring the original 400 mA specification.

Q: Are there differences in DC resistance?

A: Yes. The ELJ-QF2N7DF specifies 100mOhm maximum DC resistance, while the MLG1005S2N7ST000 specifies 150mOhm maximum. Both values are within acceptable ranges for 2.7 nH inductors in this package class. Applications sensitive to DC resistance should evaluate the 50mOhm difference against circuit requirements.

Q: Do both parts have the same operating temperature range?

A: No. The ELJ-QF2N7DF operates from -40°C to 85°C, while the MLG1005S2N7ST000 operates from -55°C to 125°C. The substitute part provides an extended temperature range suitable for wider environmental applications.

Q: Are the packages physically identical?

A: Yes. Both parts use the 0402 (1005 Metric) package with identical dimensions (0.039" L x 0.020" W / 1.00mm x 0.50mm) and height (0.022" / 0.55mm maximum seated height). No PCB layout modifications are required.

Q: What is the self-resonant frequency difference?

A: The ELJ-QF2N7DF has a self-resonant frequency of 5.5GHz, while the MLG1005S2N7ST000 is rated at 6GHz. This 0.5GHz difference is within normal manufacturing variation for multilayer ceramic inductors and does not affect substitution suitability for standard RF and high-frequency applications.

Q: Are compliance certifications equivalent?

A: Yes. Both parts share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS codes (8504.50.8000). The MLG1005S2N7ST000 additionally carries ROHS3 compliance certification.