ELJ-QF1N5DF Equivalent & Substitute Parts

Part Overview

The ELJ-QF1N5DF is a 1.5 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 listed as obsolete, making identification of equivalent substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

ELJ-QF1N5DF

Panasonic Electronic ComponentsIn Stock: 9098ELJ-QF1N5DF Datasheet

Current PartRFQ

MLG1005S1N5STD25

TDK CorporationIn Stock: 15569MLG1005S1N5STD25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-QF1N5DF is determined by strict alignment of the following electrical and mechanical parameters:

• Inductance value: 1.5 nH with tolerance ±0.3 nH
• Package / Case: 0402 (1005 Metric) surface mount
• Core material: Ceramic, unshielded construction
• Physical dimensions: 0.039" L x 0.020" W (1.00mm x 0.50mm)
• Height - Seated (Max): 0.022" (0.55mm)

The substitute part MLG1005S1N5STD25 meets these core requirements. Variations in current rating, DC resistance, Q factor, and operating temperature range are permissible when the substitute part maintains or exceeds the performance envelope of the original component in these secondary parameters.

Parameter Comparison

Engineering Selection Recommendations

The MLG1005S1N5STD25 from TDK Corporation is a direct functional equivalent for the obsolete ELJ-QF1N5DF. The substitute part maintains identical inductance value and tolerance, identical package dimensions, and identical core material composition. The TDK part offers enhanced specifications in current rating (1 A versus 400 mA) and extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C), providing greater design margin in these parameters.

The TDK MLG1005S1N5STD25 carries AEC-Q200 automotive qualification and ROHS3 compliance status, whereas the original Panasonic part is listed as obsolete. Both components share identical moisture sensitivity level (MSL 1) and REACH compliance status. The substitute part is currently in active production with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the MLG1005S1N5STD25 be used as a direct replacement for the ELJ-QF1N5DF?

A: Yes. Both components share identical inductance value (1.5 nH ±0.3 nH), identical package dimensions (0402 / 1005 Metric), and identical core material (ceramic, unshielded). Physical and electrical compatibility is confirmed for PCB layout and circuit operation.

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

A: The ELJ-QF1N5DF is rated for 400 mA maximum current, while the MLG1005S1N5STD25 is rated for 1 A maximum current. The substitute part provides higher current capacity, which is compatible with applications designed for the original part.

Q: Are there differences in DC resistance?

A: The ELJ-QF1N5DF specifies 70 mOhm maximum DCR, while the MLG1005S1N5STD25 specifies 100 mOhm maximum DCR. This difference is within acceptable tolerance for most high-frequency applications. Circuit designers should verify DCR impact on specific application performance if resistance-sensitive behavior is critical.

Q: What is the operating temperature difference?

A: The ELJ-QF1N5DF operates from -40°C to 85°C, while the MLG1005S1N5STD25 operates from -55°C to 125°C. The substitute part provides extended temperature range coverage, suitable for applications requiring wider environmental operating conditions.

Q: Are packaging and mounting considerations identical?

A: Yes. Both components use 0402 (1005 Metric) surface mount package with identical physical dimensions (0.039" L x 0.020" W, 1.00mm x 0.50mm) and identical maximum seated height (0.022" / 0.55mm). PCB footprints and reflow soldering profiles are compatible.

Q: What is the product status difference?

A: The ELJ-QF1N5DF is listed as obsolete, while the MLG1005S1N5STD25 is in active production. The substitute part ensures long-term procurement availability and design continuity.