SRP0310-3R3K Equivalent & Substitute Parts

Part Overview

The SRP0310-3R3K is a 3.3 µH shielded surface mount inductor manufactured by Bourns Inc., rated for 2.1 A continuous current with a maximum DC resistance of 160mOhm. This component features a metal core construction in a nonstandard package measuring 3.40mm × 3.10mm with a seated height of 1.00mm. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

SRP0310-3R3K

Bourns Inc.In Stock: 738SRP0310-3R3K Datasheet

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SRP0320-3R3K

Bourns Inc.In Stock: 2723SRP0320-3R3K Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The SRP0320-3R3K qualifies as a direct substitute for the SRP0310-3R3K based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Inductance value: 3.3 µH with ±10% tolerance
• Shielding classification: Shielded
• Core material: Metal
• Operating temperature range: -40°C ~ 125°C
• Mounting type: Surface Mount
• Package dimensions: 3.40mm L × 3.10mm W (identical footprint)
• RoHS3 compliance
• Moisture Sensitivity Level 1

Enhanced Performance Characteristics: The SRP0320-3R3K provides improved electrical performance with a higher current rating of 2.5 A (versus 2.1 A), reduced DC resistance of 119mOhm (versus 160mOhm), and higher saturation current of 3.3 A (versus 2.2 A). These enhancements maintain backward compatibility while offering superior thermal and current handling characteristics within the same physical footprint.

Parameter Comparison

Engineering Selection Recommendations

The SRP0320-3R3K is the designated substitute for the obsolete SRP0310-3R3K. Both components maintain identical electrical specifications for inductance value and tolerance, shielding classification, and core material composition. The substitute part is fully compliant with ROHS3 and REACH requirements, matching the regulatory status of the original component.

The SRP0320-3R3K offers enhanced performance margins with increased current rating and reduced DC resistance, providing improved reliability in applications where the original part is no longer available. The identical footprint dimensions (3.40mm × 3.10mm) ensure direct PCB compatibility. The increase in seated height from 1.00mm to 2.00mm must be evaluated for clearance in space-constrained applications.

The SRP0320-3R3K carries a Last Time Buy status, indicating limited availability. Procurement planning should account for this supply constraint when transitioning from the obsolete SRP0310-3R3K.

Frequently Asked Questions (FAQ)

Q: Can the SRP0320-3R3K be used as a direct replacement for the SRP0310-3R3K in existing designs?

A: Yes. Both parts share identical inductance values, tolerance specifications, shielding characteristics, and core materials. The footprint dimensions are identical at 3.40mm × 3.10mm. The primary consideration is the increase in seated height from 1.00mm to 2.00mm, which must be verified against PCB clearance requirements and component placement constraints.

Q: What are the key electrical differences between these two parts?

A: The SRP0320-3R3K provides superior electrical performance with a higher current rating of 2.5 A compared to 2.1 A, reduced DC resistance of 119mOhm versus 160mOhm, and higher saturation current of 3.3 A versus 2.2 A. These improvements result in lower power dissipation and enhanced current handling capability while maintaining the same inductance specification.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the SRP0310-3R3K and SRP0320-3R3K are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

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

A: The SRP0310-3R3K is classified as obsolete, indicating it is no longer manufactured and existing inventory is depleted. The SRP0320-3R3K carries a Last Time Buy status, meaning limited quantities remain available before production ceases. This status difference underscores the importance of transitioning to the substitute part for long-term design support.

Q: Are there any packaging differences between these components?

A: Both parts are supplied in nonstandard packages with identical lateral dimensions. The primary packaging difference is the seated height: the SRP0310-3R3K measures 1.00mm while the SRP0320-3R3K measures 2.00mm. This height difference must be considered in applications with strict vertical clearance limitations.

Q: What is the moisture sensitivity classification for both parts?

A: Both components are classified as Moisture Sensitivity Level 1 (Unlimited), indicating they require no special moisture control during storage, handling, or assembly processes.