ELJ-PC4R7MF Equivalent & Substitute Parts

Part Overview

The ELJ-PC4R7MF is a 4.7 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 285 mA with a maximum DC resistance of 1.2Ohm in a 1008 (2520 Metric) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

ELJ-PC4R7MF

Panasonic Electronic ComponentsIn Stock: 1051ELJ-PC4R7MF Datasheet

Current PartRFQ

NLCV25T-4R7M-EF

TDK CorporationIn Stock: 2192NLCV25T-4R7M-EF Datasheet

DirectRFQ

CW252016-4R7J

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

SimilarRFQ

NLV25T-4R7J-PF

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ELJ-PC4R7MF is determined by the following critical parameters:

• Inductance Value: 4.7 µH (exact match required)
• Package / Case: 1008 (2520 Metric) (physical compatibility)
• Mounting Type: Surface Mount (assembly compatibility)
• Current Rating: Minimum 285 mA (functional requirement)
• DC Resistance: Lower or equal values preferred for performance optimization
• Shielding: Unshielded (electromagnetic compatibility)
• Self Resonant Frequency: 43MHz (frequency response matching)

Substitute parts are grouped into two categories:

Direct Substitutes (Full Parameter Compatibility):

• NLCV25T-4R7M-EF (TDK Corporation): Meets or exceeds all critical parameters with active product status

Similar Substitutes (Reduced Current Rating):

• CW252016-4R7J (Bourns Inc.): 175 mA current rating (61% of original specification)
• NLV25T-4R7J-PF (TDK Corporation): 175 mA current rating (61% of original specification)

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: NLCV25T-4R7M-EF (TDK Corporation)

This part provides full electrical and mechanical compatibility with the ELJ-PC4R7MF. It maintains the 285 mA current rating, achieves lower DC resistance (1.04Ohm vs. 1.2Ohm), and offers superior Q factor (20 vs. 8 at 7.96MHz). The part carries active product status with ROHS3 compliance and extended operating temperature range (-40°C ~ 105°C), supporting long-term design continuity.

Secondary Options: CW252016-4R7J and NLV25T-4R7J-PF

Both parts are suitable only for applications where the current requirement does not exceed 175 mA. CW252016-4R7J offers the widest operating temperature range (-40°C ~ 125°C) and tightest inductance tolerance (±5%). NLV25T-4R7J-PF provides the highest Q factor (30 @ 7.96MHz) but carries "Not For New Designs" status, limiting its use to legacy system support.

Frequently Asked Questions (FAQ)

Q: Can NLCV25T-4R7M-EF directly replace ELJ-PC4R7MF without circuit modification?

A: Yes. Both parts share identical inductance (4.7 µH), current rating (285 mA), package (1008 / 2520 Metric), and self-resonant frequency (43MHz). The NLCV25T-4R7M-EF exhibits lower DC resistance and higher Q factor, which improve circuit efficiency without requiring design changes.

Q: What is the impact of using CW252016-4R7J or NLV25T-4R7J-PF in a 285 mA application?

A: These parts are rated for 175 mA maximum, which is 61% of the original specification. Using them in applications requiring 285 mA will cause the inductor to operate beyond its current rating, resulting in excessive heating, core saturation, and potential component failure. These parts are suitable only for applications with current requirements of 175 mA or less.

Q: How do tolerance differences affect circuit performance?

A: The ELJ-PC4R7MF and NLCV25T-4R7M-EF both specify ±20% tolerance, ensuring equivalent inductance variation. CW252016-4R7J and NLV25T-4R7J-PF offer tighter ±5% tolerance, which may improve circuit stability in precision applications but is not required for direct substitution.

Q: Are all substitute parts RoHS compliant?

A: NLCV25T-4R7M-EF and CW252016-4R7J are ROHS3 compliant. NLV25T-4R7J-PF is ROHS3 compliant but REACH affected. The original ELJ-PC4R7MF RoHS status is not specified in the provided data.

Q: What is the significance of "Not For New Designs" status for NLV25T-4R7J-PF?

A: This designation indicates the manufacturer is not recommending this part for new product development. While it remains available for existing designs, NLCV25T-4R7M-EF is the preferred choice for new applications due to its active product status and extended lifecycle support.

Q: Do all substitute parts fit the same PCB footprint?

A: Yes. All parts use the 1008 (2520 Metric) package with identical length (0.098" / 2.50mm) and width (0.079" / 2.00mm). Height variations are minimal (1.80mm to 1.90mm seated), ensuring compatibility with standard surface mount assembly processes.