ELJ-RF2N7DFB Equivalent & Substitute Parts

Part Overview

The ELJ-RF2N7DFB is a 2.7 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 functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

ELJ-RF2N7DFB

Panasonic Electronic ComponentsIn Stock: 17507ELJ-RF2N7DFB Datasheet

Current PartRFQ

MLG1005S2N7ST000

TDK CorporationIn Stock: 45472MLG1005S2N7ST000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-RF2N7DFB is determined by the following critical parameters:

Inductance value and tolerance must match exactly at 2.7 nH ±0.3 nH to maintain circuit performance in RF applications. The 0402 (1005 Metric) package is mandatory for mechanical and electrical compatibility with existing PCB layouts. Unshielded construction must be preserved to avoid electromagnetic coupling changes. DC resistance, current rating, and self-resonant frequency are secondary parameters that define performance boundaries. The substitute part MLG1005S2N7ST000 meets all primary substitution criteria while offering enhanced electrical performance in secondary parameters.

Parameter Comparison

Engineering Selection Recommendations

The MLG1005S2N7ST000 (TDK Corporation) is the direct substitute for the obsolete ELJ-RF2N7DFB. Both components share identical inductance values, tolerances, package dimensions, and shielding characteristics. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

The MLG1005S2N7ST000 provides superior electrical performance in secondary parameters: current rating is doubled to 800 mA, operating temperature range is extended to -55°C ~ 125°C, and self-resonant frequency is increased to 6 GHz. DC resistance is slightly higher at 150 mOhm maximum compared to 100 mOhm maximum in the original part. Both components maintain identical moisture sensitivity levels and regulatory compliance certifications (REACH Unaffected, ECCN EAR99).

Selection of the TDK substitute is appropriate for applications where the original Panasonic component is no longer available. The enhanced current rating and extended temperature range provide additional design margin without compromising the core RF performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can MLG1005S2N7ST000 be used as a direct replacement for ELJ-RF2N7DFB?

A: Yes. Both components have identical inductance values (2.7 nH), identical tolerances (±0.3 nH), identical package dimensions (0402 / 1005 Metric), and identical shielding configuration (unshielded). Mechanical and electrical compatibility is confirmed.

Q: What are the differences between these two parts?

A: The primary differences are in secondary performance parameters. The TDK substitute offers higher current rating (800 mA vs. 400 mA), extended operating temperature range (-55°C to 125°C vs. -20°C to 85°C), and higher self-resonant frequency (6 GHz vs. 5.5 GHz). DC resistance is slightly higher (150 mOhm max vs. 100 mOhm max). The substitute part is in active production while the original is obsolete.

Q: Are there any compliance or certification differences?

A: No. Both components share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and moisture sensitivity level (MSL 1 - Unlimited). Regulatory compliance is equivalent.

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

A: The increase from 100 mOhm to 150 mOhm maximum represents a 50 mOhm difference. Circuit impact depends on application-specific current levels and thermal requirements. For applications operating below 400 mA, the resistance difference is typically negligible.

Q: Is the package footprint identical?

A: Yes. Both components use the 0402 (1005 Metric) surface mount package with identical dimensions (0.039" L x 0.020" W / 1.00mm x 0.50mm) and identical maximum seated height (0.022" / 0.55mm). PCB layout compatibility is confirmed.