ELJ-RF1N2DFB Equivalent & Substitute Parts

Part Overview

The ELJ-RF1N2DFB is a 1.2 nH unshielded multilayer inductor manufactured by Panasonic Electronic Components in the 0402 (1005 Metric) surface mount package. This component is designed for RF and high-frequency applications requiring low inductance values with controlled DC resistance characteristics. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

ELJ-RF1N2DFB

Panasonic Electronic ComponentsIn Stock: 1125ELJ-RF1N2DFB Datasheet

Current PartRFQ

MLG1005S1N2ST000

TDK CorporationIn Stock: 285440MLG1005S1N2ST000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-RF1N2DFB is determined by strict equivalence in the following critical parameters:

• Inductance Value: 1.2 nH (with tolerance ±0.3 nH)
• Package / Case: 0402 (1005 Metric) surface mount
• Shielding Configuration: Unshielded
• Core Material: Non-magnetic ceramic construction
• Mounting Type: Surface mount

The MLG1005S1N2ST000 from TDK Corporation meets all primary substitution criteria. While this substitute exhibits differences in current rating (1 A vs. 400 mA) and DC resistance (100 mOhm Max vs. 60 mOhm Max), these represent performance enhancements rather than incompatibilities. The substitute maintains identical inductance, package geometry, and core material specifications.

Parameter Comparison

Engineering Selection Recommendations

The MLG1005S1N2ST000 is the direct substitute for the obsolete ELJ-RF1N2DFB. Selection is supported by:

• Product Status: The substitute is active and in production, ensuring long-term availability and supply chain stability.
• Compliance: The MLG1005S1N2ST000 carries RoHS3 compliance certification, meeting current regulatory requirements.
• Regulatory Alignment: Both components share identical REACH status (REACH Unaffected) and ECCN classification (EAR99).
• Electrical Equivalence: Identical inductance value and tolerance ensure functional compatibility in RF circuit applications.
• Package Compatibility: Identical 0402 (1005 Metric) package dimensions and surface mount configuration enable direct PCB layout compatibility.

The substitute's enhanced current rating (1 A vs. 400 mA) and extended operating temperature range (-55°C ~ 125°C vs. -20°C ~ 85°C) provide additional design margin without introducing incompatibility.

Frequently Asked Questions (FAQ)

Q: Can the MLG1005S1N2ST000 be used as a direct replacement for the ELJ-RF1N2DFB?

A: Yes. Both components share identical inductance (1.2 nH), inductance tolerance (±0.3 nH), package geometry (0402 / 1005 Metric), and core material (non-magnetic ceramic). The substitute is electrically and mechanically compatible for direct PCB substitution.

Q: What are the differences between these two inductors?

A: The MLG1005S1N2ST000 provides higher current rating (1 A vs. 400 mA), wider operating temperature range (-55°C ~ 125°C vs. -20°C ~ 85°C), and higher self-resonant frequency (10 GHz vs. 6 GHz). DC resistance is higher (100 mOhm Max vs. 60 mOhm Max). These differences represent performance enhancements in the substitute.

Q: Are there any compliance or certification differences?

A: The MLG1005S1N2ST000 includes RoHS3 compliance certification. Both components share identical REACH status and ECCN classification. The substitute meets current regulatory requirements for electronic component procurement.

Q: Will the higher DC resistance of the substitute affect circuit performance?

A: The 40 mOhm difference in maximum DC resistance (60 mOhm vs. 100 mOhm) must be evaluated within the specific circuit application. For RF matching networks and impedance-critical applications, this parameter difference should be assessed against design tolerances.

Q: Is the substitute available in the same packaging format?

A: Yes. The MLG1005S1N2ST000 is supplied in Tape & Reel (TR) packaging in the identical 0402 (1005 Metric) surface mount package, enabling direct integration into existing assembly processes.