CS321613-4R7K Equivalent & Substitute Parts

Part Overview

The CS321613-4R7K is a 4.7 µH shielded multilayer inductor manufactured by Bourns Inc., designed for surface mount applications in the 1206 (3216 Metric) package. This component is rated for 50 mA maximum current with 800mOhm maximum DC resistance and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

CS321613-4R7K

Bourns Inc.In Stock: 884CS321613-4R7K Datasheet

Current PartRFQ

AIML-1206-4R7K-T

Abracon LLCIn Stock: 1579AIML-1206-4R7K-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS321613-4R7K is determined by strict equivalence across the following critical parameters:

• Inductance Value: 4.7 µH (exact match required)
• Inductance Tolerance: ±10% (matching tolerance band)
• Current Rating: 50 mA minimum (equal or higher acceptable)
• Package / Case: 1206 (3216 Metric) (physical and electrical compatibility)
• Shielding Type: Shielded (electromagnetic containment requirement)
• Core Material: Ferrite (performance and frequency characteristics)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)
• Mounting Type: Surface Mount (assembly process compatibility)

The AIML-1206-4R7K-T from Abracon LLC meets all substitution criteria and is classified as an active product with current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The AIML-1206-4R7K-T is a direct substitute for the obsolete CS321613-4R7K. Both components are ROHS3 compliant and carry MSL rating of 1 (Unlimited), indicating equivalent environmental qualification and handling requirements.

The substitute part demonstrates improved DC resistance performance (700mOhm Max versus 800mOhm Max), which provides a performance advantage in applications sensitive to inductor losses. The physical dimensions are identical, with the substitute exhibiting a slightly lower seated height (0.055" versus 0.059"), ensuring compatibility with existing PCB layouts and assembly processes.

The AIML-1206-4R7K-T is currently in active production status, providing long-term supply chain stability and availability compared to the obsolete Bourns part.

Frequently Asked Questions (FAQ)

Q: Can the AIML-1206-4R7K-T be used as a direct replacement for the CS321613-4R7K in existing designs?

A: Yes. Both components share identical inductance values (4.7 µH), tolerance (±10%), current ratings (50 mA), package dimensions (1206 / 3216 Metric), and operating temperature ranges (-55°C ~ 125°C). Physical compatibility is confirmed by matching footprint dimensions and MSL ratings.

Q: What is the significance of the DC resistance difference between the two parts?

A: The AIML-1206-4R7K-T has a maximum DC resistance of 700mOhm compared to 800mOhm for the CS321613-4R7K. This represents improved performance in the substitute part, reducing resistive losses in the inductor. This difference is within acceptable substitution parameters and does not create compatibility issues.

Q: Are there any height clearance concerns when substituting the AIML-1206-4R7K-T?

A: No. The substitute part has a maximum seated height of 0.055" (1.40mm) compared to 0.059" (1.50mm) for the original part. The substitute is physically smaller in height, ensuring compatibility with existing PCB designs and assembly clearances.

Q: What compliance certifications apply to both parts?

A: Both the CS321613-4R7K and AIML-1206-4R7K-T are ROHS3 compliant and carry MSL rating 1 (Unlimited), indicating equivalent environmental qualification and handling requirements for manufacturing and storage.

Q: Why is the CS321613-4R7K listed as obsolete?

A: The CS321613-4R7K is classified as obsolete by the manufacturer, indicating discontinued production. The AIML-1206-4R7K-T is an active product with current manufacturing support, making it the recommended choice for new designs and ongoing production requirements.