ELJ-NJ18NJF2 Equivalent & Substitute Parts

Part Overview

The ELJ-NJ18NJF2 is an 18 nH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 550 mA with a maximum DC resistance of 150mOhm. This component is packaged in 0603 (1608 Metric) surface mount format and operates across the temperature range of -40°C to 85°C. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

ELJ-NJ18NJF2

Panasonic Electronic ComponentsIn Stock: 1007ELJ-NJ18NJF2 Datasheet

Current PartRFQ

CW160808-18NJ

Bourns Inc.In Stock: 1154CW160808-18NJ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELJ-NJ18NJF2 is determined by the following critical parameters:

• Inductance Value: Must be 18 nH with ±5% tolerance to maintain circuit performance
• Package / Case: Must be 0603 (1608 Metric) surface mount for PCB compatibility
• Shielding Type: Must be unshielded to match electromagnetic characteristics
• Current Rating: Must meet or exceed 550 mA to support circuit current demands
• DC Resistance: Must not exceed 150mOhm to maintain acceptable power dissipation
• Operating Temperature Range: Must support minimum -40°C to 85°C operation

The CW160808-18NJ from Bourns Inc. meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The CW160808-18NJ is a direct functional substitute for the obsolete ELJ-NJ18NJF2. Selection is based on the following factors:

Product Status: The ELJ-NJ18NJF2 is obsolete, requiring an active alternative. The CW160808-18NJ maintains active product status with Bourns Inc.

Compliance: The CW160808-18NJ is ROHS3 compliant and REACH unaffected, providing superior regulatory compliance compared to the non-compliant original part.

Electrical Parameters: The substitute meets all critical electrical specifications. The higher current rating (700 mA vs. 550 mA) and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C) provide additional design margin.

Physical Compatibility: Both parts share identical package dimensions (0603 / 1608 Metric) and mounting type, ensuring direct PCB footprint compatibility.

Performance Trade-offs: The CW160808-18NJ exhibits lower Q factor (30 vs. 40 at 250MHz) and lower self-resonant frequency (3.1GHz vs. 5GHz). These differences are acceptable for most applications but should be verified in high-frequency or high-Q circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the CW160808-18NJ be used as a direct replacement for the ELJ-NJ18NJF2?

A: Yes. Both parts share identical inductance (18 nH), tolerance (±5%), package format (0603 / 1608 Metric), and shielding type (unshielded). The substitute meets all critical electrical parameters for functional equivalence.

Q: What are the differences in DC resistance between these parts?

A: The ELJ-NJ18NJF2 specifies 150mOhm maximum, while the CW160808-18NJ is rated at 170mOhm. This 20mOhm difference represents approximately 13% higher resistance. For applications sensitive to inductor losses, verify that the increased DCR does not exceed power dissipation limits.

Q: Does the lower Q factor of the CW160808-18NJ affect circuit performance?

A: The CW160808-18NJ has a Q of 30 at 250MHz compared to 40 for the original part. This lower Q may impact high-frequency filtering or resonant circuit applications. Verify performance in circuits operating near the self-resonant frequency or requiring high selectivity.

Q: Are there package or mounting differences?

A: No. Both parts use 0603 (1608 Metric) surface mount packaging with identical footprints. The CW160808-18NJ has a slightly taller seated height (1.20mm vs. 0.80mm), which should be verified against PCB clearance requirements.

Q: What is the advantage of the extended temperature range in the CW160808-18NJ?

A: The CW160808-18NJ operates from -40°C to 125°C, compared to -40°C to 85°C for the original part. This extended range provides additional design margin for applications in elevated ambient conditions or thermal cycling environments.