ELJ-RF1N8DFB Equivalent & Substitute Parts

Part Overview

The ELJ-RF1N8DFB is a 1.8 nH unshielded multilayer inductor manufactured by Panasonic Electronic Components, designed for surface mount applications in the 0402 (1005 Metric) package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part delivers 400 mA current rating with 80mOhm maximum DC resistance and operates across -20°C to 85°C temperature range.

Substiute Parts

ELJ-RF1N8DFB

Panasonic Electronic ComponentsIn Stock: 1143ELJ-RF1N8DFB Datasheet

Current PartRFQ

MLG1005S1N8STD25

TDK CorporationIn Stock: 7450MLG1005S1N8STD25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELJ-RF1N8DFB is determined by the following critical parameters:

• Inductance Value: 1.8 nH with ±0.3nH tolerance (exact match required)
• Package / Case: 0402 (1005 Metric) surface mount (physical compatibility)
• Shielding Type: Unshielded (electromagnetic performance consistency)
• Mounting Type: Surface Mount (assembly process compatibility)

The substitute part MLG1005S1N8STD25 meets all primary substitution criteria. While this substitute exhibits higher current rating (900 mA vs. 400 mA), increased DC resistance (150mOhm vs. 80mOhm), and extended operating temperature range (-55°C ~ 125°C vs. -20°C ~ 85°C), these represent performance enhancements or expanded operational boundaries that do not prevent functional substitution in applications designed for the original part.

Parameter Comparison

Engineering Selection Recommendations

The MLG1005S1N8STD25 is the qualified substitute for the obsolete ELJ-RF1N8DFB. Selection is supported by:

• Product Status: MLG1005S1N8STD25 maintains active status, ensuring long-term availability and supply chain stability
• Compliance: MLG1005S1N8STD25 carries AEC-Q200 automotive qualification and ROHS3 compliance, providing enhanced reliability documentation
• Electrical Equivalence: Identical inductance value and tolerance with matching package and mounting specifications
• Operational Margin: Higher current rating and extended temperature range provide design margin without introducing incompatibility

Frequently Asked Questions (FAQ)

Q: Can MLG1005S1N8STD25 directly replace ELJ-RF1N8DFB in existing designs?

A: Yes. Both components share identical inductance (1.8 nH ±0.3nH), package (0402 / 1005 Metric), and mounting type (surface mount). Physical and electrical compatibility is confirmed.

Q: How do the DC resistance differences affect circuit performance?

A: MLG1005S1N8STD25 exhibits 150mOhm maximum DCR compared to 80mOhm for ELJ-RF1N8DFB. This represents increased resistive loss. Circuit designs must account for this parameter difference in applications where DCR is a critical specification.

Q: What is the significance of the higher current rating on MLG1005S1N8STD25?

A: The 900 mA rating on MLG1005S1N8STD25 versus 400 mA on ELJ-RF1N8DFB indicates expanded current handling capability. This does not create incompatibility; it provides additional operational margin for the substitute part.

Q: Are there packaging or moisture sensitivity concerns?

A: Both components feature MSL 1 (Unlimited) moisture sensitivity classification and identical 0402 (1005 Metric) packaging. No packaging or moisture handling differences exist.

Q: Does the extended temperature range of MLG1005S1N8STD25 create compatibility issues?

A: No. The MLG1005S1N8STD25 operating range (-55°C ~ 125°C) encompasses the original part range (-20°C ~ 85°C). Extended temperature capability does not prevent substitution.