CS321613-120K Equivalent & Substitute Parts

Part Overview

The CS321613-120K is a 12 µH shielded multilayer inductor manufactured by Bourns Inc., designed for surface mount applications in the 1206 (3216 Metric) package. This component features a 25 mA current rating, 900 mOhm maximum DC resistance, and operates across the -55°C to 125°C temperature range. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

CS321613-120K

Bourns Inc.In Stock: 1115CS321613-120K Datasheet

Current PartRFQ

AIML-1206-120K-T

Abracon LLCIn Stock: 1066AIML-1206-120K-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CS321613-120K is determined by the following critical parameters:

• Inductance Value: Must be 12 µH with ±10% tolerance
• Package / Case: Must be 1206 (3216 Metric) for mechanical and electrical compatibility
• Shielding: Must be shielded to maintain electromagnetic isolation
• Core Material: Ferrite construction required
• Operating Temperature Range: Must support -55°C to 125°C minimum
• DC Resistance: Maximum 900 mOhm
• Mounting Type: Surface mount configuration

The AIML-1206-120K-T from Abracon LLC meets all critical substitution criteria. While the current rating differs (15 mA versus 25 mA), this represents a derating condition acceptable in applications where the circuit current demand does not exceed the substitute part's 15 mA specification.

Parameter Comparison

Engineering Selection Recommendations

The AIML-1206-120K-T qualifies as a direct substitute for the CS321613-120K based on matching inductance, tolerance, package dimensions, shielding configuration, and operating temperature specifications. Both components are ROHS3 compliant and carry MSL 1 moisture sensitivity ratings.

The primary design consideration is the reduced current rating of the substitute part (15 mA versus 25 mA). Selection of the AIML-1206-120K-T is appropriate for applications where circuit current does not exceed 15 mA. For applications requiring the full 25 mA rating of the original part, alternative inductors with higher current specifications must be evaluated.

The substitute part's active product status provides superior long-term availability and supply chain continuity compared to the obsolete original component.

Frequently Asked Questions (FAQ)

Q: Can the AIML-1206-120K-T be used as a direct replacement in all applications using the CS321613-120K?

A: The AIML-1206-120K-T is mechanically and electrically compatible for applications where circuit current does not exceed 15 mA. If the original design requires the full 25 mA current rating, the substitute part is not suitable without circuit redesign or selection of an alternative component with higher current capacity.

Q: Are the physical dimensions identical between these two parts?

A: Both parts use the 1206 (3216 Metric) package with identical length and width (0.126" x 0.063"). The substitute part has a slightly lower maximum seated height (0.055" versus 0.059"), which is compatible with standard PCB assembly processes.

Q: What is the significance of the different Q values at 2 MHz?

A: The Q factor difference (65 versus 55) reflects variations in core material and winding design between manufacturers. Both values are within acceptable ranges for typical inductor applications. The specific impact depends on circuit requirements; applications with stringent Q specifications should be evaluated individually.

Q: Are both parts RoHS compliant?

A: Yes, both the CS321613-120K and AIML-1206-120K-T are ROHS3 compliant and carry MSL 1 moisture sensitivity ratings, meeting current environmental and reliability standards.

Q: Why does the substitute part have a higher self-resonant frequency?

A: The self-resonant frequency difference (26 MHz versus 22 MHz) results from variations in parasitic capacitance due to different winding geometries and core materials. Both frequencies are suitable for standard RF and analog circuit applications operating below these resonance points.