0603-47NK Equivalent & Substitute Parts Reference

Part Overview

The 0603-47NK is a 47 nH unshielded drum core wirewound inductor manufactured by API Delevan Inc., designed for surface mount applications with a current rating of 600 mA and maximum DC resistance of 280 mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across the temperature range of -40°C to 125°C and is suitable for high-frequency applications up to 2 GHz self-resonant frequency.

Substiute Parts

0603-47NK

API Delevan Inc.In Stock: 7650603-47NK Datasheet

Current PartRFQ

CW160808-47NJ

Bourns Inc.In Stock: 3502CW160808-47NJ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0603-47NK is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Inductance value: 47 nH (tolerance variations acceptable within design margin)
• Current rating: 600 mA minimum
• DC resistance: 280 mOhm maximum
• Core type: Drum core, wirewound construction
• Shielding configuration: Unshielded
• Operating temperature range: -40°C to 125°C minimum
• Mounting: Surface mount technology
• Self-resonant frequency: 2 GHz or higher

The substitute part CW160808-47NJ from Bourns Inc. meets all primary equivalence criteria. While the core material differs (alumina versus ceramic), both materials are acceptable for unshielded drum core inductors in this inductance and current rating class. The substitute demonstrates improved inductance tolerance (±5% versus ±10%), higher self-resonant frequency (2.1 GHz), and active product status with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CW160808-47NJ (Bourns Inc.)

The CW160808-47NJ is the qualified substitute for the obsolete 0603-47NK. Selection is based on the following engineering factors:

1. Functional Equivalence: All critical electrical parameters (inductance, current rating, DC resistance, frequency response) are equivalent or superior to the original part.

2. Product Status: The substitute is an active product with current manufacturing support, addressing the obsolescence of the original 0603-47NK.

3. Regulatory Compliance: The CW160808-47NJ is RoHS3 compliant, meeting current environmental and regulatory requirements. The original part is RoHS non-compliant.

4. Packaging Standardization: The substitute uses standard 0603 (1608 Metric) packaging with Tape & Reel distribution, improving supply chain reliability compared to the nonstandard packaging of the original.

5. Performance Advantages: The substitute offers tighter inductance tolerance (±5% versus ±10%) and higher self-resonant frequency (2.1 GHz versus 2 GHz), providing improved performance margins.

6. Physical Compatibility: While physical dimensions differ slightly (1.65mm x 1.05mm versus 1.80mm x 1.14mm), both parts are surface mount compatible with standard PCB footprints for 0603/1608 packages.

Frequently Asked Questions (FAQ)

Q: Can the CW160808-47NJ directly replace the 0603-47NK in existing designs?

A: Yes. Both parts share identical inductance (47 nH), current rating (600 mA), DC resistance (280 mOhm max), and operating temperature range (-40°C to 125°C). The substitute meets or exceeds all electrical specifications of the original part.

Q: What is the difference between ceramic and alumina core materials in these inductors?

A: Both ceramic and alumina are acceptable core materials for unshielded drum core inductors in this inductance and current rating class. The alumina core in the substitute provides comparable performance with improved inductance tolerance control.

Q: Does the tighter tolerance (±5% versus ±10%) of the substitute affect circuit design?

A: The tighter tolerance of the CW160808-47NJ provides improved inductance accuracy, which benefits circuit performance. Designs originally specified for ±10% tolerance will operate within acceptable margins with the ±5% substitute.

Q: Are there packaging considerations when switching from the 0603-47NK to the CW160808-47NJ?

A: Yes. The original part uses nonstandard packaging, while the substitute uses standard 0603 (1608 Metric) Tape & Reel packaging. Standard packaging improves supply chain availability and reduces procurement complexity. PCB footprints designed for 0603 surface mount components are compatible with the substitute.

Q: What is the significance of the higher self-resonant frequency (2.1 GHz versus 2 GHz)?

A: The higher self-resonant frequency of the substitute extends the usable frequency range and provides improved performance margin in high-frequency applications. This is a performance advantage with no negative impact on existing designs.

Q: Is RoHS3 compliance important for this substitution?

A: Yes. The substitute's RoHS3 compliance meets current environmental regulations and industry standards. The original part's non-compliance may restrict its use in new designs or applications subject to regulatory requirements.

Q: Are there any electrical performance differences between the two parts?

A: The Q factor measurements differ slightly (38 @ 200 MHz versus 35 @ 250 MHz), reflecting the different core materials and test frequencies. Both values indicate acceptable performance for unshielded drum core inductors in this class. The substitute's Q measurement at a higher frequency (250 MHz) demonstrates consistent performance across the frequency spectrum.