0805-101K Equivalent & Substitute Parts Reference

Part Overview

The API Delevan Inc. 0805-101K is a 100 nH unshielded drum core wirewound inductor rated for 400 mA continuous current with a maximum DC resistance of 460 mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The part operates across the temperature range of -40°C to 125°C and is mounted as a surface mount device in a nonstandard 0805 package format.

Substiute Parts

0805-101K

API Delevan Inc.In Stock: 10050805-101K Datasheet

Current PartRFQ

CW201212-R10J

Bourns Inc.In Stock: 858CW201212-R10J Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 0805-101K is based on strict electrical and mechanical parameter matching within the allowed tolerances for this inductor category. The following parameters determine substitution validity:

Critical Matching Parameters:

• Inductance value: 100 nH (tolerance variations acceptable within industry standards)
• Current rating: minimum 400 mA
• DC resistance: must not exceed 460 mOhm maximum
• Core type: ceramic drum core, wirewound construction
• Shielding configuration: unshielded
• Mounting: surface mount technology
• Operating temperature range: -40°C to 125°C minimum

Acceptable Variation Ranges:

• Inductance tolerance: ±10% to ±5% (tighter tolerance acceptable)
• Package dimensions: 0805 (2012 Metric) standard equivalent to nonstandard 0805
• Q factor at 500 MHz: 60 to 65 (minor variation acceptable)
• Self resonant frequency: 1.2 GHz (matching specification)

The Bourns Inc. CW201212-R10J meets all critical parameters and is classified as an active product with improved compliance status.

Parameter Comparison

Engineering Selection Recommendations

The Bourns Inc. CW201212-R10J is the qualified substitute for the obsolete API Delevan 0805-101K based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match or exceed the original specification. The CW201212-R10J delivers identical inductance (100 nH), current rating (400 mA), and self-resonant frequency (1.2 GHz). The lower DC resistance (430 mOhm versus 460 mOhm maximum) provides improved performance with reduced power dissipation.

Mechanical Compatibility: Both components utilize identical surface mount technology with functionally equivalent 0805 package dimensions. The Bourns part dimensions (2.10mm x 1.50mm) are slightly smaller than the API Delevan nonstandard 0805 (2.29mm x 1.73mm), ensuring PCB layout compatibility without modification.

Compliance and Availability: The CW201212-R10J is ROHS3 compliant and actively manufactured by Bourns Inc., addressing the obsolescence of the original part. The component is available in standard Tape & Reel packaging for production environments.

Tolerance Improvement: The Bourns substitute offers tighter inductance tolerance (±5% versus ±10%), providing enhanced circuit performance and reduced component variation in production batches.

Frequently Asked Questions (FAQ)

Q: Can the CW201212-R10J be used as a direct replacement for the 0805-101K without PCB modifications?

A: Yes. Both components are surface mount devices with compatible 0805 package dimensions. The Bourns part is slightly smaller (2.10mm x 1.50mm versus 2.29mm x 1.73mm), which ensures fit within existing PCB footprints designed for the original part.

Q: What is the significance of the lower DC resistance in the Bourns substitute?

A: The CW201212-R10J has a DC resistance of 430 mOhm compared to the 460 mOhm maximum of the original part. This lower resistance reduces power dissipation and heat generation during operation, improving overall circuit efficiency.

Q: Are there any frequency response differences between these two inductors?

A: Both components share identical self-resonant frequency (1.2 GHz) and inductance test frequency (150 MHz). The Q factor at 500 MHz shows minor variation (60 versus 65), which is within acceptable engineering tolerances for this component category.

Q: Why is the inductance tolerance difference (±5% versus ±10%) important?

A: Tighter tolerance in the Bourns part reduces component-to-component variation in production. This results in more consistent circuit performance across manufacturing batches and improved yield in applications with tight inductance specifications.

Q: Is the CW201212-R10J suitable for the same temperature operating range?

A: Yes. Both components operate across the identical temperature range of -40°C to 125°C, ensuring thermal compatibility in all specified environmental conditions.

Q: What is the packaging difference, and does it affect component selection?

A: The CW201212-R10J is supplied in standard Tape & Reel (TR) format, which is the industry standard for automated PCB assembly. The original part packaging information was not specified. Tape & Reel format is compatible with all standard pick-and-place equipment.

Q: Are there any compliance or regulatory differences?

A: The CW201212-R10J is ROHS3 compliant, meeting current environmental regulations. The original 0805-101K is marked as RoHS non-compliant. For new designs and production, the Bourns substitute ensures compliance with current regulatory requirements.