ELJ-FC2R2JF Equivalent & Substitute Parts

Part Overview

The Panasonic ELJ-FC2R2JF is a 2.2 µH unshielded wirewound surface mount inductor rated for 155 mA with a maximum DC resistance of 1.05Ohm in a 1008 (2520 Metric) package. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and design updates. Substitute parts must maintain the same inductance value, tolerance, package dimensions, and mounting type while meeting or exceeding the electrical performance requirements of the original specification.

Key Parameters

Parameter	Value
Inductance	2.2 µH
Tolerance	±5%
Current Rating	155 mA
DC Resistance (DCR)	1.05Ohm Max
Shielding	Unshielded
Package / Case	1008 (2520 Metric)
Mounting Type	Surface Mount
Operating Temperature	-20°C ~ 85°C
Size / Dimension	0.098" L x 0.079" W (2.50mm x 2.00mm)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

Inductance value must be 2.2 µH with ±5% tolerance
Package must be 1008 (2520 Metric) with identical footprint dimensions (0.098" L x 0.079" W)
Mounting type must be Surface Mount
Current rating must meet or exceed 155 mA
Shielding configuration must be unshielded
DC resistance should be comparable to minimize circuit performance deviation

The substitute parts listed below meet these core electrical and mechanical compatibility criteria. Variations in DC resistance, Q factor, and self-resonant frequency are acceptable within engineering design margins, provided the part operates within the specified current and temperature ranges.

Parameter Comparison

Parameter	ELJ-FC2R2JF (Main)	IMC1008ER2R2J	NLV25T-2R2J-EF	NLV25T-2R2J-EFD	NLV25T-2R2J-PF	1008-222J
Manufacturer	Panasonic	Vishay Dale	TDK	TDK	TDK	API Delevan
Inductance	2.2 µH	2.2 µH	2.2 µH	2.2 µH	2.2 µH	2.2 µH
Tolerance	±5%	±5%	±5%	±5%	±5%	±5%
Current Rating (Amps)	155 mA	200 mA	200 mA	200 mA	200 mA	433 mA
DC Resistance (DCR)	1.05Ohm Max	2.35Ohm Max	1.55Ohm Max	1.55Ohm Max	1.55Ohm Max	800mOhm Max
Shielding	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded
Package / Case	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)	Nonstandard
Size / Dimension	0.098" L x 0.079" W (2.50mm x 2.00mm)	0.098" L x 0.079" W (2.50mm x 2.00mm)	0.098" L x 0.079" W (2.50mm x 2.00mm)	0.098" L x 0.079" W (2.50mm x 2.00mm)	0.098" L x 0.079" W (2.50mm x 2.00mm)	0.105" L x 0.095" W (2.66mm x 2.41mm)
Operating Temperature	-20°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 125°C
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Active
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement):

The TDK NLV25T-2R2J-EFD and NLV25T-2R2J-EF are the preferred direct substitutes for the ELJ-FC2R2JF. Both parts maintain identical package dimensions, inductance, and tolerance specifications. The NLV25T-2R2J-EFD is recommended for new designs due to its active product status and AEC-Q200 automotive qualification rating. The NLV25T-2R2J-EF offers equivalent electrical performance with active status and ROHS3 compliance.

Secondary Substitute:

The Vishay Dale IMC1008ER2R2J provides functional equivalence with a higher current rating (200 mA) and extended operating temperature range (-40°C ~ 125°C). The increased DC resistance (2.35Ohm Max) may impact circuit performance in applications sensitive to resistive losses.

Legacy Substitute (Not Recommended for New Designs):

The TDK NLV25T-2R2J-PF maintains electrical compatibility but carries a "Not For New Designs" status. This part should be used only for legacy system maintenance or repair applications.

Non-Standard Alternative:

The API Delevan 1008-222J features a nonstandard package footprint (0.105" L x 0.095" W) that does not conform to the 1008 (2520 Metric) standard. This part is not suitable for direct PCB replacement without layout modification. Additionally, it carries RoHS non-compliance status.

Frequently Asked Questions (FAQ)

Q: Can the NLV25T-2R2J-EFD be used as a direct drop-in replacement for the ELJ-FC2R2JF?

A: Yes. Both parts share identical package dimensions (1008 / 2520 Metric), inductance value (2.2 µH), tolerance (±5%), and surface mount configuration. The NLV25T-2R2J-EFD exceeds the current rating requirement (200 mA vs. 155 mA) and provides an extended operating temperature range.

Q: What is the impact of higher DC resistance in the IMC1008ER2R2J substitute?

A: The IMC1008ER2R2J has a maximum DC resistance of 2.35Ohm compared to the original 1.05Ohm. This 1.3Ohm increase will result in higher resistive losses in the inductor. Circuit designs sensitive to power dissipation or impedance matching should account for this difference during validation.

Q: Why is the 1008-222J not recommended as a substitute?

A: The 1008-222J uses a nonstandard package footprint (0.105" L x 0.095" W) that does not match the 1008 (2520 Metric) standard (0.098" L x 0.079" W). Direct PCB substitution is not possible without layout redesign. Additionally, this part does not meet RoHS compliance requirements.

Q: Is the NLV25T-2R2J-PF suitable for new product designs?

A: No. The NLV25T-2R2J-PF carries a "Not For New Designs" status and should be reserved for legacy system support or repair applications only. Use the NLV25T-2R2J-EFD for new designs.

Q: What are the key differences between NLV25T-2R2J-EF and NLV25T-2R2J-EFD?

A: Both parts are electrically identical with the same inductance, tolerance, current rating, and DC resistance. The primary difference is packaging: NLV25T-2R2J-EF is supplied in Cut Tape (CT) & Digi-Reel format, while NLV25T-2R2J-EFD is supplied in Tape & Reel (TR) format. The NLV25T-2R2J-EFD also includes AEC-Q200 automotive qualification.

Q: Are all substitute parts RoHS compliant?

A: All recommended substitutes (IMC1008ER2R2J, NLV25T-2R2J-EF, NLV25T-2R2J-EFD, NLV25T-2R2J-PF) are ROHS3 compliant. The API Delevan 1008-222J is RoHS non-compliant and should not be used in applications requiring RoHS certification.

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