0603-39NK Equivalent & Substitute Parts Reference

Part Overview

The API Delevan Inc. 0603-39NK is a 39 nH unshielded drum core wirewound inductor rated for 600 mA with a maximum DC resistance of 250 mOhm. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The part operates across the temperature range of -40°C to 125°C and is mounted as a surface mount device in a nonstandard 0603 package format.

Substiute Parts

0603-39NK

API Delevan Inc.In Stock: 8370603-39NK Datasheet

Current PartRFQ

CW160808-39NJ

Bourns Inc.In Stock: 929CW160808-39NJ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0603-39NK are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Electrical Parameters:

• Inductance value: 39 nH (exact match required)
• Current rating: 600 mA minimum
• DC resistance: 250 mOhm maximum
• Self-resonant frequency: 2.2 GHz
• Operating temperature range: -40°C to 125°C minimum

Mechanical Parameters:

• Mounting type: Surface mount
• Core type: Drum core, wirewound
• Shielding: Unshielded
• Package classification: 0603 (1608 Metric) compatible footprint

The Bourns Inc. CW160808-39NJ meets all specified electrical and mechanical requirements while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The Bourns Inc. CW160808-39NJ is the qualified substitute for the obsolete API Delevan 0603-39NK based on the following factors:

Product Status: The CW160808-39NJ maintains active product status with established supply chain availability, whereas the 0603-39NK is classified as obsolete. This status difference is critical for long-term design support and procurement continuity.

Compliance Certifications: The CW160808-39NJ is ROHS3 compliant, meeting current regulatory requirements for electronic components in restricted substance directives. The 0603-39NK is RoHS non-compliant, presenting compliance risks for new designs and applications subject to RoHS regulations.

Electrical Performance: Both parts deliver identical inductance values (39 nH) and current ratings (600 mA). The CW160808-39NJ provides superior inductance tolerance (±5% versus ±10%), resulting in tighter performance specifications. The Q factor at 250 MHz is marginally lower (35 versus 40), remaining within acceptable performance parameters for typical RF and high-frequency applications.

Physical Compatibility: The CW160808-39NJ uses a standardized 0603 (1608 Metric) package format with dimensions of 0.065" L x 0.041" W and maximum seated height of 0.047". The 0603-39NK uses a nonstandard package measuring 0.071" L x 0.045" W with 0.040" maximum height. Physical footprint differences require PCB layout verification for direct substitution.

Environmental and Regulatory: Both parts operate across -40°C to 125°C and share identical REACH and ECCN classifications (EAR99), ensuring equivalent regulatory treatment.

Frequently Asked Questions (FAQ)

Q: Can the CW160808-39NJ directly replace the 0603-39NK without PCB modifications?

A: Physical dimensions differ between the two parts. The CW160808-39NJ measures 0.065" L x 0.041" W versus the 0603-39NK at 0.071" L x 0.045" W. Height also differs (0.047" maximum versus 0.040" maximum). PCB footprint verification is required before confirming direct substitution feasibility.

Q: What is the significance of the inductance tolerance difference?

A: The CW160808-39NJ provides ±5% tolerance compared to the 0603-39NK at ±10%. This tighter tolerance reduces inductance variation across production batches, improving circuit performance consistency and reducing design margin requirements in applications sensitive to inductance accuracy.

Q: Are there any performance differences in high-frequency applications?

A: Both parts share identical self-resonant frequencies of 2.2 GHz. The Q factor at 250 MHz differs slightly (35 for CW160808-39NJ versus 40 for 0603-39NK). This 5-point difference represents approximately 12.5% lower Q performance and may impact applications requiring maximum quality factor at this frequency.

Q: Why is RoHS compliance important for this substitution?

A: The CW160808-39NJ is ROHS3 compliant while the 0603-39NK is non-compliant. RoHS compliance is mandatory for components used in applications subject to EU Directive 2011/65/EU or equivalent regional regulations. Non-compliant components present regulatory and supply chain risks for new designs.

Q: Are the core materials functionally equivalent?

A: The 0603-39NK uses ceramic core material while the CW160808-39NJ uses alumina. Both materials are suitable for unshielded drum core wirewound inductors at the specified inductance and frequency ranges. Core material differences do not affect electrical parameter equivalence for this application.

Q: What packaging format is the CW160808-39NJ supplied in?

A: The CW160808-39NJ is supplied in Tape & Reel (TR) format, standard for surface mount component distribution. The 0603-39NK packaging format is not specified in available documentation.