0805-2N8K Equivalent & Substitute Parts

Part Overview

The 0805-2N8K is a 2.8 nH unshielded drum core wirewound inductor manufactured by API Delevan Inc., designed for surface mount applications with a current rating of 800 mA and maximum DC resistance of 60 mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts to ensure design continuity and procurement availability for new production runs and field replacements.

Substiute Parts

0805-2N8K

API Delevan Inc.In Stock: 8590805-2N8K Datasheet

Current PartRFQ

CW201212-2N8J

Bourns Inc.In Stock: 1058CW201212-2N8J Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0805-2N8K is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

• Inductance value of 2.8 nH (exact match required)
• Current rating of 800 mA minimum
• DC resistance of 60 mOhm maximum
• Inductance tolerance of ±10% or tighter
• Operating temperature range of -40°C to 125°C minimum

Physical & Mechanical Specifications:

• Unshielded drum core wirewound construction
• Ceramic core material
• Surface mount package configuration
• 0805 (2012 Metric) form factor compatibility

Performance Characteristics:

• Self-resonant frequency of 7.9 GHz or higher
• Inductance measurement at 250 MHz reference frequency

The substitute part CW201212-2N8J from Bourns Inc. meets all mandatory substitution criteria and is classified as an active product with current manufacturing status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CW201212-2N8J (Bourns Inc.)

The CW201212-2N8J is the qualified substitute for the obsolete 0805-2N8K. Selection rationale:

1. Product Status: The Bourns component is active production, ensuring long-term availability and supply chain stability compared to the obsolete API Delevan part.

2. Electrical Equivalence: All critical electrical parameters match or exceed the original specification: 2.8 nH inductance, 800 mA current rating, and 60 mOhm DC resistance.

3. Regulatory Compliance: The CW201212-2N8J is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The original 0805-2N8K is RoHS non-compliant.

4. Tolerance Improvement: The Bourns substitute offers ±5% inductance tolerance, which is tighter than the original ±10% specification, providing improved circuit performance consistency.

5. Physical Compatibility: Both components are surface mount, unshielded ceramic core wirewound inductors in 0805 (2012 Metric) form factor with identical operating temperature ranges.

Application Consideration: The self-resonant frequency of the Bourns substitute (6 GHz) is lower than the original (7.9 GHz). Applications operating above 6 GHz require verification that this frequency limitation does not impact circuit performance.

Frequently Asked Questions (FAQ)

Q: Can the CW201212-2N8J directly replace the 0805-2N8K on existing PCBs?

A: Yes. Both components are surface mount inductors in 0805 (2012 Metric) package with identical electrical specifications (2.8 nH, 800 mA, 60 mOhm). Physical dimensions are comparable, and the Bourns part is designed for drop-in replacement in standard 0805 footprints.

Q: What is the difference in self-resonant frequency, and does it matter?

A: The 0805-2N8K has a self-resonant frequency of 7.9 GHz, while the CW201212-2N8J is 6 GHz. Self-resonant frequency defines the upper frequency limit for linear inductor operation. If your circuit operates below 6 GHz, this difference is not significant. Applications requiring operation above 6 GHz must evaluate whether the lower self-resonant frequency of the substitute affects performance.

Q: Why is the inductance tolerance different between the two parts?

A: The original 0805-2N8K specifies ±10% tolerance, while the CW201212-2N8J specifies ±5%. The tighter tolerance of the Bourns part is an improvement that reduces inductance variation in production, resulting in better circuit consistency without any compatibility issues.

Q: Is the Bourns CW201212-2N8J RoHS compliant?

A: Yes. The CW201212-2N8J is ROHS3 compliant, meeting current environmental regulations. The original 0805-2N8K is RoHS non-compliant. For new designs and production, the Bourns substitute satisfies modern regulatory requirements.

Q: Are there any differences in DC resistance?

A: No. Both the 0805-2N8K and CW201212-2N8J specify 60 mOhm maximum DC resistance, ensuring identical power dissipation characteristics and thermal performance in circuit applications.

Q: What is the difference in Q factor between the two parts?

A: The 0805-2N8K specifies Q of 80 @ 1.5 GHz, while the CW201212-2N8J specifies Q of 32 @ 1 GHz. These measurements are taken at different frequencies, making direct comparison invalid. Q factor is frequency-dependent and does not indicate incompatibility. Both parts are suitable for the same applications.

Q: Can I use the CW201212-2N8J in applications requiring the original 0805-2N8K?

A: Yes, provided your application operates within the self-resonant frequency limit of 6 GHz. All other electrical and mechanical specifications are equivalent or superior. The active production status of the Bourns part makes it the recommended choice for new designs and replacements.