ELJ-PC4R7MF3 Equivalent & Substitute Parts

Part Overview

The Panasonic ELJ-PC4R7MF3 is a 4.7 µH unshielded drum core wirewound inductor rated for 610 mA with 250mOhm DC resistance in a 1008 (2520 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 same inductance value, package footprint, and core material while accommodating variations in current rating and DC resistance within acceptable design parameters.

Substiute Parts

ELJ-PC4R7MF3

Panasonic Electronic ComponentsIn Stock: 838ELJ-PC4R7MF3 Datasheet

Current PartRFQ

CW252016-4R7J

Bourns Inc.In Stock: 7167CW252016-4R7J Datasheet

SimilarRFQ

NLCV25T-4R7M-PFR

TDK CorporationIn Stock: 4817NLCV25T-4R7M-PFR Datasheet

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NLV25T-4R7J-PF

TDK CorporationIn Stock: 16721NLV25T-4R7J-PF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELJ-PC4R7MF3 is determined by the following critical parameters:

• Inductance Value: Must be 4.7 µH (fixed requirement)
• Package / Case: Must be 1008 (2520 Metric) for PCB footprint compatibility
• Core Material: Must be ferrite for electromagnetic performance consistency
• Shielding: Must be unshielded to match the original design
• Mounting Type: Must be surface mount
• Current Rating: Must support the application's maximum current requirement
• DC Resistance: Must be acceptable for the circuit's power dissipation budget
• Operating Temperature: Must cover the application's thermal operating range

The three substitute parts listed below meet these core requirements while offering different performance characteristics in current handling and DC resistance.

Parameter Comparison

Engineering Selection Recommendations

CW252016-4R7J (Bourns Inc.) is the primary recommended substitute. This part carries Active product status, ensuring long-term availability and supply chain stability. It is ROHS3 compliant and operates across an extended temperature range (-40°C ~ 125°C). However, the current rating of 175 mA is significantly lower than the original 610 mA specification, and the DC resistance of 4Ohm Max is substantially higher. This substitute is suitable only for applications where the circuit current does not exceed 175 mA and where the increased power dissipation from higher DC resistance is acceptable.

NLCV25T-4R7M-PFR (TDK Corporation) offers a middle-ground option with a 500 mA current rating and 684mOhm Max DC resistance. This part is classified as Not For New Designs but remains available. It is ROHS3 compliant and supports the extended temperature range (-40°C ~ 125°C). This substitute is appropriate for applications requiring current handling between 175 mA and 610 mA where the original 610 mA rating is not critical.

NLV25T-4R7J-PF (TDK Corporation) shares the same 175 mA current limitation as the Bourns part but offers superior DC resistance performance at 2.3Ohm Max. This part is classified as Not For New Designs and is ROHS3 compliant. The operating temperature range extends to -40°C ~ 105°C. This substitute is suitable for low-current applications where DC resistance minimization is prioritized.

For applications requiring the full 610 mA current rating of the original part, none of the listed substitutes provide equivalent current handling. In such cases, alternative inductor families or higher-rated packages must be evaluated.

Frequently Asked Questions (FAQ)

Q: Can CW252016-4R7J replace ELJ-PC4R7MF3 in all applications?

A: No. The CW252016-4R7J is limited to 175 mA, which is significantly below the original part's 610 mA rating. Substitution is valid only for circuits where the maximum current does not exceed 175 mA. Additionally, the DC resistance increases from 250mOhm to 4Ohm Max, resulting in higher power dissipation.

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

A: DC resistance directly affects power dissipation in the inductor. Higher DCR values generate more heat at the same current level. For example, at 175 mA, the CW252016-4R7J dissipates approximately 122.5 mW compared to 7.6 mW for the original part at the same current. Thermal management and circuit design must account for this difference.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts (CW252016-4R7J, NLCV25T-4R7M-PFR, and NLV25T-4R7J-PF) are ROHS3 compliant. The original ELJ-PC4R7MF3 does not specify RoHS status.

Q: Do substitute parts fit the same PCB footprint?

A: Yes. All substitute parts use the 1008 (2520 Metric) package with identical physical dimensions (0.098" L x 0.079" W / 2.50mm x 2.00mm). PCB footprints are directly compatible.

Q: Which substitute offers the best current rating?

A: The NLCV25T-4R7M-PFR provides the highest current rating among substitutes at 500 mA, though this remains below the original 610 mA specification. For applications requiring the full 610 mA rating, alternative inductor solutions must be considered.

Q: What is the difference between Active and Not For New Designs product status?

A: Active status (CW252016-4R7J) indicates the manufacturer continues production and supports the part for new designs. Not For New Designs status (NLCV25T-4R7M-PFR and NLV25T-4R7J-PF) indicates the manufacturer no longer recommends these parts for new circuit designs, though existing inventory may remain available. For long-term production, Active parts are preferred.