CS321613-R39K Equivalent & Substitute Parts

Part Overview

The CS321613-R39K is a 390 nH shielded multilayer inductor manufactured by Bourns Inc., rated for 200 mA with a maximum DC resistance of 300mOhm. This component is designed for surface mount applications in the 1206 (3216 Metric) package format. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. Equivalent parts must maintain the same inductance value, current rating, package dimensions, and shielding characteristics to ensure functional compatibility in existing circuit designs.

Substiute Parts

CS321613-R39K

Bourns Inc.In Stock: 903CS321613-R39K Datasheet

Current PartRFQ

AIML-1206-R39K-T

Abracon LLCIn Stock: 1185AIML-1206-R39K-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CS321613-R39K is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance value: 390 nH ±10%
• Current rating: 200 mA minimum
• Package format: 1206 (3216 Metric)
• Shielding type: Shielded construction
• Core material: Ferrite
• Operating temperature range: -55°C ~ 125°C minimum
• RoHS compliance: ROHS3 Compliant

Allowable Variation:

• DC Resistance (DCR): May exceed 300mOhm specification if all other parameters are met, provided the substitute part is rated for the same current and temperature range
• Q factor and self-resonant frequency may vary within the ferrite multilayer inductor category

The AIML-1206-R39K-T from Abracon LLC meets all critical matching parameters and qualifies as a direct substitute despite a higher maximum DCR specification of 450mOhm.

Parameter Comparison

Engineering Selection Recommendations

The AIML-1206-R39K-T is a qualified substitute for the obsolete CS321613-R39K. Both components are ROHS3 compliant and maintain identical inductance, current rating, package dimensions, and operating temperature specifications. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

The primary electrical difference is the maximum DC resistance specification: the Abracon part specifies 450mOhm maximum compared to 300mOhm for the Bourns original. This parameter difference must be evaluated within the context of the specific circuit application. For applications where DC resistance is a critical design parameter, circuit-level analysis is required to determine if the higher DCR value is acceptable.

Both parts carry identical moisture sensitivity level (MSL 1 - Unlimited) and export classification (EAR99), ensuring equivalent handling and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the AIML-1206-R39K-T be used as a direct replacement for the CS321613-R39K?

A: Yes, the AIML-1206-R39K-T qualifies as a direct substitute based on matching inductance, current rating, package format, shielding type, and operating temperature range. The higher maximum DCR specification (450mOhm vs. 300mOhm) must be evaluated for circuit compatibility.

Q: What is the significance of the DCR difference between these parts?

A: DC resistance affects power dissipation and voltage drop across the inductor during operation. The Abracon substitute has a higher maximum DCR specification. Applications sensitive to inductor losses or voltage drop should perform circuit analysis to confirm the higher DCR is acceptable.

Q: Are the physical dimensions identical?

A: Both parts use the 1206 (3216 Metric) package. Length and width are identical at 3.20mm x 1.60mm. The seated height differs slightly: Bourns maximum 1.50mm versus Abracon maximum 1.40mm. This minor difference does not affect PCB layout compatibility.

Q: What is the product status difference and why does it matter?

A: The original CS321613-R39K is obsolete, meaning Bourns no longer manufactures it. The AIML-1206-R39K-T is in active production, ensuring continued availability and supply chain reliability for new designs and production runs.

Q: Are both parts RoHS compliant?

A: Yes, both the CS321613-R39K and AIML-1206-R39K-T are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components.