ELJ-FAR68MF2 Equivalent & Substitute Parts

Part Overview

The ELJ-FAR68MF2 is a 680 nH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 260 mA with a maximum DC resistance of 550 mOhm. This component is packaged in a 1210 (3225 Metric) surface mount form factor and operates across the temperature range of -20°C to 85°C. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Inductance	680 nH
Tolerance	±20%
Current Rating	260 mA
DC Resistance (DCR)	550 mOhm Max
Shielding	Unshielded
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount
Operating Temperature	-20°C ~ 85°C
Frequency - Self Resonant	135 MHz
Q @ Freq	25 @ 25.2 MHz

Substitute Part Grouping Explanation

Substitution for the ELJ-FAR68MF2 is determined by the following critical parameters:

Inductance value: 680 nH (exact match required)
Package / Case: 1210 (3225 Metric) surface mount form factor
Shielding: Unshielded configuration
Current Rating: Minimum 260 mA (equal or higher acceptable)
DC Resistance: Maximum 550 mOhm (equal or lower acceptable)
Operating Temperature Range: Must support the application's thermal requirements
Mounting Type: Surface Mount

Substitute parts are grouped into two categories based on electrical performance characteristics:

Group A - Direct Electrical Equivalents (260 mA Current Rating, 550 mOhm DCR):

CM322522-R68KL (Bourns Inc.)
CM322522-R68ML (Bourns Inc.)

Group B - Enhanced Performance Substitutes (Higher Current Rating and/or Lower DCR):

1210R-681K (API Delevan Inc.) – 588 mA, 600 mOhm
IMC1210BNR68M (Vishay Dale) – 450 mA, 600 mOhm
IMC1210EBR68M (Vishay Dale) – 450 mA, 600 mOhm
IMC1210ERR68M (Vishay Dale) – 450 mA, 600 mOhm
IMC1210ESR68M (Vishay Dale) – 450 mA, 600 mOhm
IMC1210SYR68M (Vishay Dale) – 450 mA, 600 mOhm
IMC1210SZR68M (Vishay Dale) – 450 mA, 600 mOhm
NLCV32T-R68M-EFR (TDK Corporation) – 1.9 A, 54 mOhm

Parameter Comparison

Part Number	Manufacturer	Inductance	Tolerance	Current Rating (mA)	DCR (mOhm Max)	Package	Operating Temp	Self Resonant Freq (MHz)	Q @ 25.2 MHz	Product Status
ELJ-FAR68MF2	Panasonic	680 nH	±20%	260	550	1210	-20 ~ 85°C	135	25	Obsolete
CM322522-R68KL	Bourns Inc.	680 nH	±10%	260	550	Nonstandard	-40 ~ 125°C	135	25	Active
CM322522-R68ML	Bourns Inc.	680 nH	±20%	260	550	Nonstandard	-40 ~ 125°C	135	25	Active
1210R-681K	API Delevan Inc.	680 nH	±10%	588	600	1210	-55 ~ 125°C	160	30	Active
IMC1210BNR68M	Vishay Dale	680 nH	±20%	450	600	1210	-55 ~ 125°C	160	30	Active
IMC1210EBR68M	Vishay Dale	680 nH	±20%	450	600	1210	-55 ~ 125°C	160	30	Active
IMC1210ERR68M	Vishay Dale	680 nH	±20%	450	600	1210	-55 ~ 125°C	160	30	Active
IMC1210ESR68M	Vishay Dale	680 nH	±20%	450	600	1210	-55 ~ 125°C	160	30	Active
IMC1210SYR68M	Vishay Dale	680 nH	±20%	450	600	1210	-55 ~ 125°C	160	30	Active
IMC1210SZR68M	Vishay Dale	680 nH	±20%	450	600	1210	-55 ~ 125°C	160	30	Active
NLCV32T-R68M-EFR	TDK Corporation	680 nH	±20%	1900	54	1210	-40 ~ 105°C	180	10	Active

Engineering Selection Recommendations

For Direct Replacement (Electrical and Mechanical Equivalence):

CM322522-R68ML is the primary active substitute. It matches the ELJ-FAR68MF2 in inductance (680 nH), current rating (260 mA), and DC resistance (550 mOhm). The part is ROHS3 compliant and REACH unaffected, with extended operating temperature range (-40°C to 125°C). Inventory availability is high (9760 pcs). The package designation is listed as nonstandard; physical dimensions (3.20mm x 2.50mm x 2.20mm height) are compatible with 1210 footprints.

CM322522-R68KL offers tighter inductance tolerance (±10% vs ±20%) with identical electrical ratings and the same physical compatibility. Inventory is lower (836 pcs).

For Applications Requiring Enhanced Current Handling:

The Vishay Dale IMC-1210 series (IMC1210EBR68M, IMC1210ERR68M, IMC1210ESR68M) provides 450 mA current rating with 600 mOhm DCR. These parts are ROHS3 compliant and support extended temperature range (-55°C to 125°C). Packaging variants include bulk and tape & reel options. These are suitable when the original 260 mA rating is insufficient but the 680 nH inductance value must be maintained.

For Maximum Current Capacity:

NLCV32T-R68M-EFR (TDK Corporation) delivers 1.9 A current rating with significantly lower DC resistance (54 mOhm). This part is ROHS3 compliant with high inventory (2200 pcs). Selection is appropriate for high-current applications where the lower DCR reduces power dissipation. The higher self-resonant frequency (180 MHz) and lower Q factor (10 @ 25.2 MHz) reflect different core material (ferrite vs. iron powder).

For Extended Temperature Range:

1210R-681K (API Delevan Inc.) supports -55°C to 125°C operation with 588 mA current rating and ±10% tolerance. This part is suitable for applications requiring broader thermal performance than the original -20°C to 85°C specification.

Frequently Asked Questions (FAQ)

Q: Can CM322522-R68ML replace ELJ-FAR68MF2 directly in the PCB layout?

A: Physical dimensions are compatible (3.20mm x 2.50mm footprint). The nonstandard package designation refers to the drum core construction rather than footprint incompatibility. Verify PCB land pattern accommodates the 2.20mm seated height (vs. 2.40mm original).

Q: What is the difference between IMC1210EBR68M and IMC1210ESR68M?

A: Both parts are electrically identical (680 nH, 450 mA, 600 mOhm, ±20% tolerance). The difference is packaging: EBR68M is supplied in bulk, while ESR68M is supplied in tape & reel format.

Q: Why does NLCV32T-R68M-EFR have lower Q factor than the original part?

A: Q factor is material-dependent. NLCV32T-R68M-EFR uses ferrite core material, while ELJ-FAR68MF2 uses wirewound construction. The lower Q (10 vs. 25 @ 25.2 MHz) reflects different core characteristics. Both maintain the 680 nH inductance value.

Q: Is the Bourns CM322522 package truly compatible with 1210 footprints?

A: Yes. Despite the nonstandard package designation, physical dimensions (3.20mm x 2.50mm) match 1210 (3225 Metric) footprints. The designation refers to the drum core construction method, not footprint incompatibility.

Q: Which substitute offers the best compliance profile?

A: CM322522-R68ML, IMC1210EBR68M, IMC1210ERR68M, IMC1210ESR68M, and NLCV32T-R68M-EFR are all ROHS3 compliant and REACH unaffected. IMC1210BNR68M and IMC1210SYR68M and IMC1210SZR68M are RoHS non-compliant and REACH affected.

Q: Can I use a higher current-rated substitute in a circuit designed for 260 mA?

A: Yes. Higher current ratings provide design margin. Verify that DC resistance (DCR) change does not affect circuit performance. Enhanced performance substitutes (450 mA or 1.9 A rated) have higher or lower DCR values; confirm thermal and impedance characteristics remain acceptable.

Q: What is the inventory status for active substitutes?

A: CM322522-R68ML has the highest inventory (9760 pcs). NLCV32T-R68M-EFR has 2200 pcs. Vishay Dale IMC-1210 variants range from 780 to 1132 pcs. API Delevan 1210R-681K has 861 pcs. Bourns CM322522-R68KL has 836 pcs.

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