ELJ-FA221JF Equivalent & Substitute Parts

Part Overview

The Panasonic ELJ-FA221JF is a 220 µH unshielded wirewound inductor rated for 45 mA with 21Ohm maximum DC resistance in a 1210 (3225 Metric) surface mount package. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support. Substitute parts maintain the core electrical specifications while offering improved availability and extended product lifecycles from active manufacturers.

Key Parameters

Parameter	Value
Inductance	220 µH
Tolerance	±5%
Current Rating	45 mA
DC Resistance (DCR)	21Ohm Max
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount
Shielding	Unshielded
Inductance Test Frequency	796 kHz
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Inductance Value: 220 µH (exact match required)
Tolerance: ±5% (exact match required)
DC Resistance: 21Ohm Max (exact match required)
Package / Case: 1210 (3225 Metric) (exact match required)
Mounting Type: Surface Mount (exact match required)
Shielding: Unshielded (exact match required)
Test Frequency: 796 kHz (exact match required)
Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

All substitute parts listed meet these criteria. Current rating variations (45 mA vs. 50 mA) are acceptable as substitute parts with higher current ratings provide equivalent or superior performance in the same electrical circuit. Substitute parts are grouped by manufacturer and product status to facilitate selection based on availability and compliance requirements.

Parameter Comparison

Part Number	Manufacturer	Inductance	Tolerance	Current Rating (mA)	DCR (Ohm Max)	Package	Q @ 796kHz	Self Resonant Freq	Operating Temp	Product Status
ELJ-FA221JF	Panasonic	220 µH	±5%	45	21	1210	20 @ 796kHz	7MHz	-20°C ~ 85°C	Obsolete
IMC1210BN221J	Vishay Dale	220 µH	±5%	50	21	1210	15 @ 796kHz	6MHz	-55°C ~ 125°C	Active
IMC1210EB221J	Vishay Dale	220 µH	±5%	50	21	1210	15 @ 796kHz	6MHz	-55°C ~ 125°C	Active
IMC1210ER221J	Vishay Dale	220 µH	±5%	50	21	1210	15 @ 796kHz	6MHz	-55°C ~ 125°C	Active
IMC1210SY221J	Vishay Dale	220 µH	±5%	50	21	1210	15 @ 796kHz	6MHz	-55°C ~ 125°C	Active
NLV32T-221J-EF	TDK Corporation	220 µH	±5%	50	21	1210	20 @ 796kHz	7MHz	-40°C ~ 105°C	Active
NLV32T-221J-EFD	TDK Corporation	220 µH	±5%	50	21	1210	20 @ 796kHz	7MHz	-40°C ~ 105°C	Active
NLV32T-221J-PF	TDK Corporation	220 µH	±5%	50	21	1210	20 @ 796kHz	7MHz	-40°C ~ 105°C	Not For New Designs
B82422T1224J000	EPCOS - TDK Electronics	220 µH	±5%	—	—	1210	—	—	-55°C ~ 125°C	Active

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compliance)

NLV32T-221J-EFD (TDK Corporation) is the recommended primary substitute. This part maintains electrical performance equivalent to the original ELJ-FA221JF, including Q factor of 20 @ 796kHz and self-resonant frequency of 7MHz. It carries AEC-Q200 automotive qualification and ROHS3 compliance, supporting extended temperature operation from -40°C to 105°C. Tape & Reel packaging supports high-volume production.

NLV32T-221J-EF (TDK Corporation) provides an alternative from the same manufacturer with identical electrical specifications and AEC-Q200 qualification. This variant is suitable for applications not requiring automotive-grade certification.

Secondary Substitutes (Active Status, Standard Compliance)

IMC1210EB221J (Vishay Dale) is ROHS3 compliant and REACH unaffected, offering the widest operating temperature range (-55°C to 125°C). This part is suitable for industrial and extended-temperature applications. Bulk packaging is available.

IMC1210ER221J (Vishay Dale) provides equivalent electrical performance in Tape & Reel format, supporting automated assembly processes.

Alternative Consideration

NLV32T-221J-PF (TDK Corporation) is designated "Not For New Designs" and should be used only for legacy system maintenance or repair applications where supply continuity is critical.

B82422T1224J000 (EPCOS - TDK Electronics) uses a 2-SMD J-Lead package variant of the 1210 form factor. Incomplete DCR and Q factor specifications limit direct electrical comparison; this part is suitable only when package form factor compatibility is confirmed.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 mA rated substitute in place of the 45 mA ELJ-FA221JF?

A: Yes. A higher current rating indicates the substitute part can safely handle the original circuit's current demand with additional margin. All listed substitutes rated for 50 mA are electrically compatible with the 45 mA original specification.

Q: What is the difference between IMC1210BN221J, IMC1210EB221J, and IMC1210ER221J?

A: These three Vishay Dale parts share identical electrical specifications (220 µH, ±5%, 50 mA, 21Ohm DCR). The differences are packaging format and compliance status. IMC1210BN221J and IMC1210SY221J are RoHS non-compliant; IMC1210EB221J and IMC1210ER221J are ROHS3 compliant. Select based on your supply chain and regulatory requirements.

Q: Why do TDK NLV32T-221J variants have different suffixes (EF, EFD, PF)?

A: The suffix indicates the product series and lifecycle status. NLV32T-221J-EFD includes AEC-Q200 automotive qualification; NLV32T-221J-EF is the standard industrial variant; NLV32T-221J-PF is legacy (Not For New Designs). For new designs, select EFD or EF based on automotive requirements.

Q: Is the B82422T1224J000 a direct replacement?

A: The B82422T1224J000 maintains the 1210 (3225 Metric) footprint and 220 µH inductance but uses a 2-SMD J-Lead package configuration. Verify PCB pad layout compatibility before selection. Incomplete electrical specifications (DCR and Q factor not provided) require confirmation with the manufacturer for critical applications.

Q: What is the difference between Tape & Reel and Bulk packaging?

A: Tape & Reel (TR) packaging is optimized for automated pick-and-place assembly and high-volume production. Bulk packaging is suitable for manual assembly or lower-volume applications. Both formats contain the same component; packaging selection depends on assembly process requirements.

Q: Which substitute offers the best temperature range?

A: IMC1210EB221J and IMC1210BN221J (Vishay Dale) support -55°C to 125°C operation, the widest range among all substitutes. The original ELJ-FA221JF operates from -20°C to 85°C. Select the Vishay variant if your application requires extended low-temperature or high-temperature performance.

Q: Are all substitutes RoHS compliant?

A: No. IMC1210BN221J and IMC1210SY221J are RoHS non-compliant. IMC1210EB221J, IMC1210ER221J, NLV32T-221J-EF, NLV32T-221J-EFD, NLV32T-221J-PF, and B82422T1224J000 are ROHS3 compliant. Verify compliance requirements for your application and supply chain.

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