ELJ-PF4N7DFB Equivalent & Substitute Parts

Part Overview

The ELJ-PF4N7DFB is a 4.7 nH unshielded drum core wirewound inductor manufactured by Panasonic Electronic Components. This surface mount component is rated for 1.3 A maximum current with 100mOhm DC resistance in a 0402 (1005 Metric) package. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications requiring this inductance value and package form factor.

Substiute Parts

ELJ-PF4N7DFB

Panasonic Electronic ComponentsIn Stock: 860ELJ-PF4N7DFB Datasheet

Current PartRFQ

AISC-0402HP-4N7J-T

Abracon LLCIn Stock: 5953AISC-0402HP-4N7J-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELJ-PF4N7DFB is determined by the following critical parameters:

• Inductance Value: Must be 4.7 nH to maintain circuit performance
• Package / Case: Must be 0402 (1005 Metric) for PCB compatibility
• Mounting Type: Must be Surface Mount
• Core Type: Drum core, wirewound construction
• Shielding: Unshielded configuration
• Current Rating: Must meet or exceed 1.3 A minimum requirement
• DC Resistance: Lower or equal DCR values are acceptable for improved performance

The AISC-0402HP-4N7J-T from Abracon LLC meets all substitution criteria with identical inductance, package, and core specifications while offering improved electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The AISC-0402HP-4N7J-T is a direct functional substitute for the obsolete ELJ-PF4N7DFB. Selection is based on the following engineering factors:

Product Status: The ELJ-PF4N7DFB is obsolete, while the AISC-0402HP-4N7J-T maintains active production status, ensuring long-term availability and supply chain continuity.

Electrical Compatibility: Both components share identical inductance values (4.7 nH) and package specifications (0402 Metric). The substitute provides superior electrical performance with lower DC resistance (75mOhm vs 100mOhm) and higher current rating (1.4 A vs 1.3 A), making it suitable for applications requiring the original part.

Compliance: The AISC-0402HP-4N7J-T carries ROHS3 compliance certification, meeting modern regulatory requirements. Both parts maintain REACH Unaffected status and EAR99 ECCN classification.

Operating Temperature: The substitute supports an extended operating temperature range (-40°C to 125°C) compared to the original (-40°C to 85°C), providing greater thermal margin for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the AISC-0402HP-4N7J-T replace the ELJ-PF4N7DFB in existing designs?

A: Yes. Both components have identical inductance values (4.7 nH), package form factors (0402 Metric), and mounting types (surface mount). The substitute meets or exceeds all critical electrical parameters of the original part.

Q: What are the key differences between these two inductors?

A: The primary differences are product status (obsolete vs active), DC resistance (100mOhm vs 75mOhm), current rating (1.3 A vs 1.4 A), and operating temperature range (-40°C to 85°C vs -40°C to 125°C). The substitute offers improved electrical performance and extended thermal operating range.

Q: Are there any package compatibility concerns?

A: No. Both parts use the 0402 (1005 Metric) package with identical mounting type (surface mount). PCB footprints and assembly processes remain unchanged.

Q: Does the inductance tolerance difference affect circuit performance?

A: The ELJ-PF4N7DFB specifies ±0.3nH tolerance, while the AISC-0402HP-4N7J-T specifies ±5% tolerance. For a 4.7 nH component, ±5% equals approximately ±0.235nH, which is tighter than the original specification. This provides improved inductance consistency.

Q: What compliance certifications apply to the substitute part?

A: The AISC-0402HP-4N7J-T is ROHS3 compliant and REACH Unaffected. Both parts carry EAR99 ECCN classification and are subject to identical regulatory frameworks.

Q: Is the extended temperature range of the substitute beneficial?

A: The AISC-0402HP-4N7J-T operates from -40°C to 125°C compared to the original -40°C to 85°C range. This extended range provides additional thermal margin and may be advantageous in high-temperature applications or environments with elevated ambient conditions.