ELJ-FA151JF Equivalent & Substitute Parts

Part Overview

The ELJ-FA151JF is a 150 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 50 mA continuous current with 15 Ohm maximum DC resistance in a 1210 (3225 Metric) surface mount package. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain the core electrical specifications: 150 µH inductance at ±5% tolerance, 15 Ohm maximum DC resistance, and compatibility with 1210 package dimensions and surface mount assembly processes.

Key Parameters

Parameter	ELJ-FA151JF Value	Specification Basis
Inductance	150 µH	Core electrical requirement
Inductance Tolerance	±5%	Acceptable variation range
Current Rating	50 mA	Continuous current capacity
DC Resistance (DCR)	15 Ohm Max	Power loss and thermal constraint
Package / Case	1210 (3225 Metric)	PCB footprint compatibility
Mounting Type	Surface Mount	Assembly process requirement
Shielding	Unshielded	EMI performance characteristic
Frequency - Self Resonant	8 MHz	High-frequency performance limit
Q @ Freq	20 @ 796 kHz	Quality factor at test frequency
Operating Temperature	-20°C ~ 85°C	Thermal operating range
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Handling and storage requirement

Substitute Part Grouping Explanation

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

Critical Parameters (Must Match or Exceed):

Inductance: 150 µH ±5%
DC Resistance: 15 Ohm maximum
Package / Case: 1210 (3225 Metric)
Mounting Type: Surface Mount
Shielding: Unshielded
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

Current Rating: Substitute parts rated at 50 mA or higher are acceptable (higher ratings provide design margin)
Operating Temperature: Substitute parts with equal or wider temperature ranges are acceptable
Q @ Freq and Self Resonant Frequency: Substitute parts meeting or exceeding these values are acceptable
Product Status: Active parts are preferred over obsolete or not-for-new-designs classifications

Substitute Categories:

Group A - Direct Electrical & Thermal Equivalents (50 mA Rating):

PM1210-151J-RC (Bourns Inc.) - Matches 50 mA current rating, active status, RoHS3 compliant
CM322522-151JL (Bourns Inc.) - Matches 50 mA current rating, active status, RoHS3 compliant

Group B - Higher Current Rating Substitutes (65 mA Rating):

NLV32T-151J-EF (TDK Corporation) - 65 mA rating, active status, RoHS3 compliant, AEC-Q200 rated
NLV32T-151J-EFD (TDK Corporation) - 65 mA rating, active status, RoHS3 compliant, AEC-Q200 rated
NLV32T-151J-PF (TDK Corporation) - 65 mA rating, not-for-new-designs status, RoHS3 compliant
IMC1210BN151J (Vishay Dale) - 65 mA rating, active status, RoHS non-compliant
IMC1210EB151J (Vishay Dale) - 65 mA rating, active status, RoHS3 compliant
IMC1210ER151J (Vishay Dale) - 65 mA rating, active status, RoHS non-compliant
IMC1210SY151J (Vishay Dale) - 65 mA rating, active status, RoHS non-compliant

Group C - Similar Specification (Package Variant):

B82422T1154J000 (EPCOS - TDK Electronics) - 150 µH, 2-SMD J-Lead package, active status, AEC-Q200 rated, RoHS3 compliant

Parameter Comparison

Part Number	Manufacturer	Inductance (µH)	Tolerance	Current Rating (mA)	DCR (Ohm Max)	Package	Q @ 796kHz	SRF (MHz)	Temp Range (°C)	Product Status	RoHS Status
ELJ-FA151JF	Panasonic	150	±5%	50	15	1210	20	8	-20 ~ 85	Obsolete	Not specified
PM1210-151J-RC	Bourns Inc.	150	±5%	50	15	1210	20	8	-40 ~ 125	Active	RoHS3
CM322522-151JL	Bourns Inc.	150	±5%	50	15	Nonstandard	20	8	-40 ~ 125	Active	RoHS3
NLV32T-151J-EF	TDK Corporation	150	±5%	65	15	1210	20	8	-40 ~ 105	Active	RoHS3
NLV32T-151J-EFD	TDK Corporation	150	±5%	65	15	1210	20	8	-40 ~ 105	Active	RoHS3
NLV32T-151J-PF	TDK Corporation	150	±5%	65	15	1210	20	8	-40 ~ 105	Not For New Designs	RoHS3
IMC1210BN151J	Vishay Dale	150	±5%	65	15	1210	15	6.5	-55 ~ 125	Active	RoHS non-compliant
IMC1210EB151J	Vishay Dale	150	±5%	65	15	1210	15	6.5	-55 ~ 125	Active	RoHS3
IMC1210ER151J	Vishay Dale	150	±5%	65	15	1210	15	6.5	-55 ~ 125	Active	RoHS non-compliant
IMC1210SY151J	Vishay Dale	150	±5%	65	15	1210	15	6.5	-55 ~ 125	Active	RoHS non-compliant
B82422T1154J000	EPCOS - TDK Electronics	150	±5%	Not specified	Not specified	2-SMD, J-Lead	Not specified	Not specified	-55 ~ 125	Active	RoHS3

Engineering Selection Recommendations

For New Designs and Active Production:

Select from active-status parts with RoHS3 compliance:

PM1210-151J-RC (Bourns Inc.) - Preferred for 50 mA applications requiring exact current rating match. Active status, RoHS3 compliant, extended temperature range (-40°C ~ 125°C), identical electrical performance to original part.
NLV32T-151J-EF or NLV32T-151J-EFD (TDK Corporation) - Preferred for applications tolerating 65 mA rating. Active status, RoHS3 compliant, AEC-Q200 rated (automotive qualification), extended temperature range (-40°C ~ 105°C), superior Q factor and self-resonant frequency matching original specification.
IMC1210EB151J (Vishay Dale) - Alternative for 65 mA applications. Active status, RoHS3 compliant, extended temperature range (-55°C ~ 125°C), though Q factor and self-resonant frequency are lower than original part.

For Maintenance and Repair of Existing Equipment:

PM1210-151J-RC maintains exact electrical and thermal characteristics of the original ELJ-FA151JF with improved compliance status.
NLV32T-151J-PF (TDK Corporation) is available in inventory but classified as not-for-new-designs; acceptable for field replacement where 65 mA rating is tolerable.

Compliance Considerations:

All recommended substitutes meet MSL 1 (Unlimited) moisture sensitivity requirement.
RoHS3 compliance is mandatory for new designs; avoid IMC-1210 series variants marked RoHS non-compliant unless legacy system constraints require them.
AEC-Q200 certification (NLV32T-151J-EFD) is required for automotive applications.

Package Compatibility:

CM322522-151JL uses nonstandard package dimensions; verify PCB footprint compatibility before selection.
B82422T1154J000 uses 2-SMD J-Lead package; not recommended as direct replacement due to package incompatibility with standard 1210 footprints.

Frequently Asked Questions (FAQ)

Q: Can I use a 65 mA rated inductor in place of the 50 mA ELJ-FA151JF?

A: Yes. A higher current rating provides design margin and does not compromise circuit function. The 65 mA substitutes (NLV32T-151J-EF, NLV32T-151J-EFD, IMC-1210 series) maintain identical inductance, tolerance, and DC resistance specifications. Current rating indicates the maximum continuous current the part can handle without exceeding temperature limits; using a part rated higher than required is acceptable.

Q: What is the difference between NLV32T-151J-EF and NLV32T-151J-EFD?

A: Both parts are electrically identical (150 µH, 65 mA, 15 Ohm DCR). The primary difference is that NLV32T-151J-EFD carries AEC-Q200 automotive qualification, making it suitable for automotive and high-reliability applications. NLV32T-151J-EF is the standard industrial version. Select NLV32T-151J-EFD if your application requires automotive-grade components.

Q: Why is the Vishay Dale IMC-1210 series showing lower Q factor (15 vs. 20) and lower self-resonant frequency (6.5 MHz vs. 8 MHz)?

A: These are inherent design differences between manufacturers' inductor architectures. While the IMC-1210 series meets the core electrical requirements (150 µH, ±5%, 15 Ohm DCR), the lower Q factor indicates slightly higher losses at the test frequency, and the lower self-resonant frequency indicates the part may exhibit different high-frequency behavior. For applications sensitive to these parameters, prefer NLV32T or PM1210 series.

Q: Is CM322522-151JL compatible with my PCB designed for 1210 package?

A: CM322522-151JL uses a nonstandard package designation despite having identical physical dimensions (3.20mm x 2.50mm). Verify the actual footprint dimensions against your PCB design. The height-seated maximum is 2.20mm (vs. 2.40mm for standard 1210), which may affect clearance in high-density layouts. Contact the supplier for detailed package drawings before committing to this substitute.

Q: Can I use B82422T1154J000 as a direct replacement?

A: No. B82422T1154J000 uses a 2-SMD J-Lead package, which is physically and electrically different from the 1210 package. Additionally, current rating and DC resistance specifications are not provided for this part, making it unsuitable as a direct substitute. This part is listed as a similar specification alternative only, not a functional replacement.

Q: Which substitute should I choose for a new product design?

A: For new designs, select PM1210-151J-RC (Bourns Inc.) if your circuit requires exactly 50 mA rating, or NLV32T-151J-EFD (TDK Corporation) if 65 mA rating is acceptable and automotive qualification is needed. Both are active-status, RoHS3 compliant, and provide extended operating temperature ranges. Avoid parts marked "Not For New Designs" (NLV32T-151J-PF) and RoHS non-compliant variants (IMC-1210 series without EB designation).

Q: What does "Not For New Designs" mean for NLV32T-151J-PF?

A: This designation indicates the manufacturer is phasing out this part number. While it remains available in inventory and is functionally equivalent, it should not be selected for new product designs. Use this part only for field replacement or maintenance of existing equipment where the original part is unavailable.

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