ELJ-RF56NGFB Equivalent & Substitute Parts

Part Overview

The ELJ-RF56NGFB is a 56 nH unshielded multilayer inductor manufactured by Panasonic Electronic Components in the 0402 (1005 Metric) surface mount package. This component is rated for 130 mA maximum current with a DC resistance of 2.5Ohm maximum and operates across the temperature range of -20°C to 85°C. The part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

ELJ-RF56NGFB

Panasonic Electronic ComponentsIn Stock: 664ELJ-RF56NGFB Datasheet

Current PartRFQ

MLG1005S56NHT000

TDK CorporationIn Stock: 8342MLG1005S56NHT000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELJ-RF56NGFB is determined by the following critical parameters:

• Inductance Value: Must be 56 nH to maintain circuit performance
• Package / Case: Must be 0402 (1005 Metric) for mechanical and electrical compatibility
• Mounting Type: Must be Surface Mount for PCB assembly compatibility
• Shielding Configuration: Must be Unshielded to match electromagnetic characteristics
• Current Rating: Must meet or exceed 130 mA minimum requirement
• DC Resistance: Should not significantly exceed 2.5Ohm to minimize power loss
• Operating Temperature Range: Must support the application's thermal requirements

The MLG1005S56NHT000 from TDK Corporation meets all substitution criteria while offering improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The MLG1005S56NHT000 is the qualified substitute for the obsolete ELJ-RF56NGFB based on the following factors:

• Electrical Equivalence: Both components provide identical 56 nH inductance with matching Q factors at 100 MHz, ensuring circuit performance parity
• Package Compatibility: Identical 0402 (1005 Metric) surface mount package enables direct PCB layout compatibility without redesign
• Performance Enhancement: The TDK substitute offers superior DC resistance (1.3Ohm vs 2.5Ohm) and higher current rating (200 mA vs 130 mA), providing design margin
• Active Product Status: MLG1005S56NHT000 is an active product with established supply chain availability, addressing the obsolescence of the original part
• Regulatory Compliance: TDK component carries ROHS3 compliance certification, meeting current environmental standards
• Thermal Range: Extended operating temperature range (-55°C to 125°C) accommodates broader application requirements

Frequently Asked Questions (FAQ)

Q: Can MLG1005S56NHT000 be used as a direct replacement for ELJ-RF56NGFB?

A: Yes. Both components share identical inductance values, package dimensions, and unshielded multilayer construction. The 0402 (1005 Metric) surface mount package ensures mechanical and electrical compatibility without PCB modifications.

Q: What are the key differences between these two inductors?

A: The primary differences are DC resistance (1.3Ohm vs 2.5Ohm), current rating (200 mA vs 130 mA), inductance tolerance (±3% vs ±2%), and operating temperature range (-55°C to 125°C vs -20°C to 85°C). The TDK substitute provides superior electrical performance across all parameters.

Q: Does the inductance tolerance difference affect circuit performance?

A: The tolerance difference (±3% vs ±2%) is within acceptable margins for most RF and filtering applications. Circuit designers should verify tolerance requirements against specific application specifications.

Q: Is the lower DC resistance of the substitute beneficial?

A: Yes. Lower DC resistance reduces power dissipation and heat generation, improving efficiency and reliability. This represents an enhancement over the original component.

Q: Are there any thermal considerations when substituting?

A: The substitute's extended operating temperature range (-55°C to 125°C) provides greater thermal margin than the original (-20°C to 85°C). Applications operating within the original temperature range will experience no thermal compatibility issues.

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

A: The original component has a self-resonant frequency of 1.5 GHz while the substitute is 1 GHz. For applications operating below 1 GHz, both components are suitable. Applications requiring operation near or above 1 GHz should verify frequency response requirements.

Q: Are packaging and moisture sensitivity levels identical?

A: Yes. Both components use 0402 (1005 Metric) surface mount packaging with MSL Level 1 (Unlimited), ensuring identical handling and storage requirements.