ELJ-FAR82KF2 Equivalent & Substitute Parts

Part Overview

The ELJ-FAR82KF2 is an 820 nH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 245 mA with a maximum DC resistance of 610 mOhm in a 1210 (3225 Metric) surface mount package. This part is classified as obsolete, making equivalent and substitute components necessary for ongoing design support and production continuity. Substitute parts must maintain the 820 nH inductance value, ±10% tolerance, and 1210 package footprint while meeting the electrical performance requirements of the original design.

Key Parameters

Parameter	Value	Specification Basis
Inductance	820 nH	Core electrical requirement
Inductance Tolerance	±10%	Acceptable variation range
Current Rating (Amps)	245 mA minimum	Thermal and saturation performance
DC Resistance (DCR)	610 mOhm maximum	Power loss and thermal management
Shielding	Unshielded	EMI characteristics and package size
Mounting Type	Surface Mount	PCB assembly compatibility
Package / Case	1210 (3225 Metric)	Physical footprint and height constraints
Operating Temperature Range	-20°C ~ 85°C	Environmental operating conditions

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical and mechanical compatibility with the ELJ-FAR82KF2:

Direct Substitutes maintain all critical parameters: 820 nH inductance, ±10% tolerance, minimum 245 mA current rating, maximum 610 mOhm DCR, unshielded configuration, and 1210 package footprint. These parts are electrically and mechanically interchangeable without circuit redesign.

Similar Substitutes share the same inductance, tolerance, and package but differ in one or more secondary parameters such as current rating, DCR, shielding, or core material. These parts require circuit-level evaluation to confirm compatibility with the original application requirements.

The substitution logic is based strictly on the following allowed parameters:

Inductance value (820 nH fixed)
Inductance tolerance (±10%)
Current rating (minimum 245 mA for direct substitutes)
DC resistance (maximum 610 mOhm for direct substitutes)
Shielding type (unshielded for direct substitutes)
Package / Case (1210 3225 Metric)
Mounting type (Surface Mount)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Inductance (nH)	Tolerance	Current Rating (mA)	DCR (mOhm Max)	Shielding	Package	Product Status	Operating Temp (°C)
ELJ-FAR82KF2	Panasonic Electronic Components	820	±10%	245	610	Unshielded	1210 (3225 Metric)	Obsolete	-20 ~ 85
1210R-821K	API Delevan Inc.	820	±10%	556	670	Unshielded	1210 (3225 Metric)	Active	-55 ~ 125
B82422A3821K100	EPCOS - TDK Electronics	820	±10%	140	2500	Unshielded	2-SMD, J-Lead	Active	-55 ~ 125
CM322522-R82KL	Bourns Inc.	820	±10%	245	610	Unshielded	Nonstandard	Active	-40 ~ 125
IMC1210BNR82K	Vishay Dale	820	±10%	450	670	Unshielded	1210 (3225 Metric)	Active	-55 ~ 125
IMC1210EBR82K	Vishay Dale	820	±10%	450	670	Unshielded	1210 (3225 Metric)	Active	-55 ~ 125
IMC1210ERR82K	Vishay Dale	820	±10%	450	670	Unshielded	1210 (3225 Metric)	Active	-55 ~ 125
IMC1210SYR82K	Vishay Dale	820	±10%	450	670	Unshielded	1210 (3225 Metric)	Active	-55 ~ 125
1210-821K	API Delevan Inc.	820	±10%	556	670	Unshielded	1210 (3225 Metric)	Active	-55 ~ 125
ISC1210EBR82K	Vishay Dale	820	±10%	450	500	Shielded	1210 (3225 Metric)	Active	-55 ~ 125
ISC1210ERR82K	Vishay Dale	820	±10%	450	500	Shielded	1210 (3225 Metric)	Active	-55 ~ 125

Engineering Selection Recommendations

Direct Substitutes (Electrically and Mechanically Interchangeable):

CM322522-R82KL (Bourns Inc.) matches the original part's current rating (245 mA) and DCR (610 mOhm Max) with identical inductance and tolerance specifications. This part is active and RoHS3 compliant. The nonstandard package designation requires physical verification against PCB layout constraints, though dimensional specifications (0.126" L x 0.098" W, 0.087" height) are compatible with 1210 footprints.

Recommended Substitutes (Active Status, Extended Temperature Range):

IMC1210ERR82K, IMC1210EBR82K, and IMC1210SYR82K (Vishay Dale, IMC-1210 series) provide higher current ratings (450 mA) and extended operating temperature range (-55°C ~ 125°C) compared to the original -20°C ~ 85°C specification. These parts maintain the 1210 package, unshielded configuration, and acceptable DCR (670 mOhm Max). IMC1210ERR82K and IMC1210EBR82K are RoHS3 compliant; IMC1210SYR82K is RoHS non-compliant.

1210R-821K and 1210-821K (API Delevan Inc.) offer higher current capacity (556 mA) and extended temperature range (-55°C ~ 125°C) with slightly elevated DCR (670 mOhm Max). Both are active parts in the 1210 package. 1210R-821K is RoHS3 compliant; 1210-821K is RoHS non-compliant.

Alternative Substitutes (Functional Equivalence with Parameter Deviations):

ISC1210ERR82K and ISC1210EBR82K (Vishay Dale, ISC-1210 series) provide shielded construction with lower DCR (500 mOhm Max) and higher Q factor (40 @ 25.2 MHz) compared to the unshielded original. These parts are suitable only if shielding is compatible with circuit design intent. Both are RoHS3 compliant and active.

B82422A3821K100 (EPCOS - TDK Electronics, SIMID series) uses a different package configuration (2-SMD, J-Lead) and exhibits significantly higher DCR (2.5 Ohm Max) and lower current rating (140 mA), making it unsuitable for direct substitution in applications requiring the original 245 mA rating.

Frequently Asked Questions (FAQ)

Q: Can I use IMC1210ERR82K as a direct replacement for ELJ-FAR82KF2?

A: IMC1210ERR82K is functionally compatible for most applications. It maintains 820 nH inductance, ±10% tolerance, and 1210 package footprint. The higher current rating (450 mA vs. 245 mA) and slightly elevated DCR (670 mOhm vs. 610 mOhm) are acceptable for circuits designed around the original 245 mA specification. The extended temperature range (-55°C ~ 125°C) provides additional operational margin.

Q: What is the difference between direct and similar substitutes?

A: Direct substitutes maintain all critical electrical parameters (inductance, tolerance, current rating, DCR) and shielding configuration, requiring no circuit redesign. Similar substitutes share inductance and package but differ in current rating, DCR, or shielding, requiring circuit-level evaluation to confirm compatibility with application requirements.

Q: Why is the B82422A3821K100 not recommended as a substitute?

A: The B82422A3821K100 has a current rating of 140 mA, which is below the original 245 mA specification. Additionally, its DCR of 2.5 Ohm Max is significantly higher than the 610 mOhm Max of the original part, resulting in substantially higher power dissipation. The 2-SMD, J-Lead package is also incompatible with 1210 footprints.

Q: Are shielded substitutes (ISC1210ERR82K, ISC1210EBR82K) compatible with the original design?

A: Shielded inductors alter EMI characteristics and may affect circuit performance in sensitive applications. Use shielded substitutes only if the original circuit design explicitly requires or permits shielding. The lower DCR (500 mOhm) of shielded parts may reduce power loss compared to the original 610 mOhm specification.

Q: What packaging options are available for 820 nH inductors in the 1210 form factor?

A: Most active substitutes are available in Tape & Reel (TR) or Bulk packaging. IMC1210ERR82K and 1210R-821K are available in Tape & Reel for automated assembly. IMC1210EBR82K and ISC1210EBR82K are available in Bulk packaging. Verify packaging availability with your supplier before design finalization.

Q: Do all substitute parts meet RoHS compliance requirements?

A: RoHS compliance varies by part. IMC1210ERR82K, IMC1210EBR82K, 1210R-821K, ISC1210ERR82K, and ISC1210EBR82K are RoHS3 compliant. IMC1210SYR82K, 1210-821K, and IMC1210BNR82K are RoHS non-compliant. Verify compliance requirements for your application before part selection.

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