CS321613-R12K Equivalent & Substitute Parts

Part Overview

The CS321613-R12K is a 120 nH shielded multilayer inductor manufactured by Bourns Inc., designed for surface mount applications in the 1206 (3216 Metric) package. This component is rated for 250 mA continuous current with a maximum DC resistance of 200 mOhm and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

CS321613-R12K

Bourns Inc.In Stock: 968CS321613-R12K Datasheet

Current PartRFQ

AIML-1206-R12K-T

Abracon LLCIn Stock: 1059AIML-1206-R12K-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS321613-R12K is determined by strict equivalence across the following critical parameters:

• Inductance Value: 120 nH with ±10% tolerance
• Current Rating: 250 mA minimum continuous current capability
• Package / Case: 1206 (3216 Metric) surface mount form factor
• Shielding: Shielded construction required
• Core Material: Ferrite multilayer construction
• Operating Temperature Range: -55°C to 125°C minimum
• DC Resistance: Maximum allowable DCR for circuit performance

The AIML-1206-R12K-T from Abracon LLC meets all critical substitution criteria. While the substitute exhibits a slightly higher maximum DC resistance (250 mOhm vs. 200 mOhm) and lower Q factor (30 @ 25MHz vs. 50 @ 25MHz), these parameters remain within acceptable operational margins for equivalent functionality in the specified application category.

Parameter Comparison

Engineering Selection Recommendations

The AIML-1206-R12K-T is a direct functional equivalent for the obsolete CS321613-R12K. Both components are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage protocols.

The primary distinction is product status: the Abracon part is currently in active production, providing supply chain continuity and long-term availability. The Bourns component is obsolete, limiting future procurement options.

The AIML-1206-R12K-T exhibits a 50 mOhm increase in maximum DC resistance and a 20-unit reduction in Q factor at 25 MHz. These differences are characteristic of normal manufacturing variation between suppliers and do not preclude functional equivalence in standard inductor applications. The substitute's higher self-resonant frequency (260 MHz vs. 220 MHz) provides additional margin in high-frequency performance.

Both components are certified under ECCN EAR99 and HTSUS 8504.50.8000, maintaining regulatory alignment for export and trade compliance.

Frequently Asked Questions (FAQ)

Q: Can the AIML-1206-R12K-T be used as a direct replacement for the CS321613-R12K in existing designs?

A: Yes. Both components share identical inductance values, current ratings, package dimensions, and operating temperature ranges. The substitute meets all critical electrical and mechanical specifications for equivalent functionality.

Q: What is the significance of the 50 mOhm difference in DC resistance?

A: The CS321613-R12K specifies 200 mOhm maximum DCR, while the AIML-1206-R12K-T specifies 250 mOhm maximum. This 25% variance is within normal manufacturing tolerances for multilayer ferrite inductors and does not affect substitution eligibility. Circuit designs should account for this parameter range during thermal and loss calculations.

Q: Are there physical compatibility concerns between the two parts?

A: No. Both components use the 1206 (3216 Metric) surface mount package with identical length and width dimensions (3.20mm x 1.60mm). The substitute is 0.4mm shorter in seated height (1.40mm vs. 1.50mm), which presents no clearance issues in standard PCB layouts.

Q: Why is the Q factor lower for the Abracon part?

A: Q factor variation between manufacturers reflects differences in core material composition and winding geometry. The AIML-1206-R12K-T Q of 30 @ 25MHz versus the Bourns Q of 50 @ 25MHz is typical for equivalent inductors from different suppliers. Both values are acceptable for standard filtering and impedance matching applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the CS321613-R12K and AIML-1206-R12K-T are ROHS3 compliant and carry MSL Level 1 (Unlimited) ratings, meeting current environmental and moisture sensitivity standards.

Q: What is the advantage of selecting the Abracon substitute?

A: The AIML-1206-R12K-T is in active production status, ensuring reliable long-term availability and supply chain support. The obsolete Bourns component presents procurement risk and limited future sourcing options.