ELJ-RF22NJF Equivalent & Substitute Parts

Part Overview

The ELJ-RF22NJF is a 22 nH unshielded multilayer inductor manufactured by Panasonic Electronic Components, designed for surface mount applications in the 0402 (1005 Metric) package. This component is rated for 200 mA maximum current with 800 mOhm maximum DC resistance and operates across -20°C to 85°C. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Inductance	22 nH
Tolerance	±5%
Current Rating	200 mA
DC Resistance (Max)	800 mOhm
Shielding	Unshielded
Package	0402 (1005 Metric)
Mounting Type	Surface Mount
Q @ 100 MHz	8
Self Resonant Frequency	2 GHz

Substitute Part Grouping Explanation

Substitution for the ELJ-RF22NJF is determined by strict electrical and mechanical compatibility across the following parameters:

Inductance Value: 22 nH with ±5% tolerance
Current Rating: Minimum 200 mA
DC Resistance: Maximum 800 mOhm
Package: 0402 (1005 Metric) surface mount
Shielding Configuration: Unshielded
Q Factor: 8 @ 100 MHz
Self Resonant Frequency: Minimum 2 GHz

The substitute part LRC0402CJ22NGV001T meets all these electrical specifications and maintains identical package dimensions and mounting characteristics, enabling direct functional replacement.

Parameter Comparison

Parameter	ELJ-RF22NJF (Panasonic)	LRC0402CJ22NGV001T (Johanson)
Inductance	22 nH	22 nH
Tolerance	±5%	±5%
Current Rating (Amps)	200 mA	200 mA
DC Resistance (Max)	800 mOhm	800 mOhm
Shielding	Unshielded	Unshielded
Q @ 100 MHz	8	8
Self Resonant Frequency	2 GHz	2.1 GHz
Package / Case	0402 (1005 Metric)	0402 (1005 Metric)
Size / Dimension	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)
Height - Seated (Max)	0.022" (0.55mm)	0.024" (0.60mm)
Operating Temperature	-20°C ~ 85°C	-55°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount

Engineering Selection Recommendations

The LRC0402CJ22NGV001T from Johanson Technology Inc. is a direct electrical equivalent to the obsolete ELJ-RF22NJF. Both components share identical inductance, tolerance, current rating, DC resistance, and Q factor specifications. The Johanson part offers extended operating temperature range (-55°C to 100°C versus -20°C to 85°C) and is RoHS3 compliant with REACH unaffected status, compared to the non-compliant ELJ-RF22NJF.

Physical compatibility is confirmed: both use the 0402 (1005 Metric) package with identical lateral dimensions. The seated height difference of 0.002" (0.05mm) is negligible for standard PCB assembly processes. The slightly higher self-resonant frequency (2.1 GHz versus 2 GHz) provides additional margin in high-frequency applications.

Selection should prioritize the LRC0402CJ22NGV001T due to active product status, regulatory compliance, and superior availability (1,509,738 units in stock versus 865 units for the obsolete Panasonic part).

Frequently Asked Questions (FAQ)

Q: Can the LRC0402CJ22NGV001T replace the ELJ-RF22NJF in existing designs?

A: Yes. Both components meet identical electrical specifications for inductance (22 nH ±5%), current rating (200 mA), DC resistance (800 mOhm max), and Q factor (8 @ 100 MHz). Package dimensions and mounting type are identical, enabling direct PCB substitution.

Q: What is the significance of the 0.002" height difference?

A: The LRC0402CJ22NGV001T has a maximum seated height of 0.024" compared to 0.022" for the ELJ-RF22NJF. This 0.05mm difference is within standard PCB assembly tolerances and does not affect component placement, solder reflow, or functional performance.

Q: Does the extended temperature range of the Johanson part affect compatibility?

A: No. The LRC0402CJ22NGV001T operates from -55°C to 100°C, which encompasses the original -20°C to 85°C range. This provides additional operational margin without introducing compatibility issues.

Q: Are there packaging differences between these parts?

A: The ELJ-RF22NJF is supplied in standard packaging, while the LRC0402CJ22NGV001T is supplied in Tape & Reel (TR) format. Both are 0402 (1005 Metric) surface mount components suitable for automated assembly.

Q: What is the impact of the 0.1 GHz difference in self-resonant frequency?

A: The LRC0402CJ22NGV001T has a self-resonant frequency of 2.1 GHz versus 2.0 GHz for the ELJ-RF22NJF. This 5% difference is within normal component variation and provides additional high-frequency performance margin.

Q: Why is RoHS compliance important for this substitution?

A: The LRC0402CJ22NGV001T is RoHS3 compliant, meeting current environmental and regulatory requirements for electronic components. The obsolete ELJ-RF22NJF is non-compliant, making the Johanson part the appropriate choice for new designs and regulated applications.

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