ELJ-RF5N6DFB Equivalent & Substitute Parts

Part Overview

The ELJ-RF5N6DFB is a 5.6 nH unshielded multilayer 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 a current rating of 340 mA and maximum DC resistance of 190mOhm. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

ELJ-RF5N6DFB

Panasonic Electronic ComponentsIn Stock: 886ELJ-RF5N6DFB Datasheet

Current PartRFQ

MLG1005S5N6STD25

TDK CorporationIn Stock: 17813MLG1005S5N6STD25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-RF5N6DFB is determined by strict equivalence across the following critical parameters:

• Inductance Value: Must be 5.6 nH with tolerance ±0.3nH
• Package / Case: Must be 0402 (1005 Metric) surface mount
• Physical Dimensions: Must match 0.039" L x 0.020" W (1.00mm x 0.50mm) with height ≤ 0.022" (0.55mm)
• Shielding Configuration: Must be unshielded
• Core Material: Must be non-magnetic
• Frequency Characteristics: Q factor at 100MHz and self-resonant frequency must be compatible with application requirements

The substitute part MLG1005S5N6STD25 meets all these criteria. While it exhibits higher current rating (600 mA vs 340 mA), higher DC resistance (250mOhm vs 190mOhm), and lower self-resonant frequency (4GHz vs 4.6GHz), these parameters represent acceptable variations within the electrical and mechanical compatibility envelope for this inductor category.

Parameter Comparison

Engineering Selection Recommendations

The MLG1005S5N6STD25 is the direct substitute for the obsolete ELJ-RF5N6DFB. Selection of this substitute is supported by the following factors:

• Product Status: The substitute is active and in production, ensuring long-term availability and supply chain continuity.
• Compliance & Certifications: The MLG1005S5N6STD25 carries AEC-Q200 qualification and ROHS3 compliance, providing enhanced reliability documentation compared to the original part.
• Electrical Equivalence: Identical inductance value and tolerance, matching Q factor at 100MHz, and compatible self-resonant frequency characteristics.
• Mechanical Compatibility: Identical package, footprint, and mounting configuration enable direct PCB layout substitution without redesign.
• Thermal Performance: Extended operating temperature range (-55°C ~ 125°C) provides broader application flexibility.

Frequently Asked Questions (FAQ)

Q: Can the MLG1005S5N6STD25 be used as a direct replacement for the ELJ-RF5N6DFB?

A: Yes. Both components share identical inductance values, tolerances, package dimensions, and Q factor characteristics at 100MHz. The substitute is mechanically and electrically compatible for direct PCB substitution.

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

A: The ELJ-RF5N6DFB is rated for 340 mA, while the MLG1005S5N6STD25 is rated for 600 mA. The higher current rating of the substitute provides additional design margin and does not create compatibility issues in applications designed for the original part.

Q: How do the DC resistance values compare?

A: The ELJ-RF5N6DFB specifies 190mOhm maximum DC resistance, while the MLG1005S5N6STD25 specifies 250mOhm maximum. This 60mOhm difference is within acceptable variation for this inductor category and should be evaluated against specific circuit loss requirements.

Q: Are there temperature range considerations for substitution?

A: The original part operates from -20°C to 85°C, while the substitute operates from -55°C to 125°C. The substitute's extended range is compatible with the original specification and provides additional operational flexibility.

Q: What is the significance of the self-resonant frequency difference?

A: The ELJ-RF5N6DFB has a self-resonant frequency of 4.6GHz, while the MLG1005S5N6STD25 is 4GHz. Both values are suitable for RF and high-frequency applications in the 5.6 nH inductor category. Application-specific frequency requirements should be evaluated against these specifications.

Q: Are the packages identical?

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

Q: What compliance certifications does the substitute carry?

A: The MLG1005S5N6STD25 is AEC-Q200 qualified and ROHS3 compliant, providing automotive-grade reliability documentation and environmental compliance suitable for regulated applications.