SD8328-2R5-R Equivalent & Substitute Parts

Part Overview

The SD8328-2R5-R is a 2.5 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 6.6 A continuous current with a maximum DC resistance of 15.6 mOhm and operates across the temperature range of -40°C to 125°C. The part maintains Active product status and is RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain disruptions, or specific application performance parameters within the allowed electrical and mechanical specifications for this inductor category.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Inductance	2.5	µH	Critical - Must match exactly
Current Rating	6.6	A	Critical - Minimum acceptable rating
DC Resistance (DCR)	15.6	mOhm Max	Critical - Affects power dissipation
Saturation Current (Isat)	4.5	A	Important - Operating margin indicator
Core Material	Ferrite	-	Critical - Determines core characteristics
Shielding	Shielded	-	Critical - EMI containment requirement
Operating Temperature	-40°C to 125°C	°C	Important - Application environment
Mounting Type	Surface Mount	-	Critical - PCB assembly compatibility
RoHS Status	RoHS Compliant	-	Important - Regulatory compliance

Substitute Part Grouping Explanation

Substitute parts for the SD8328-2R5-R are identified based on strict alignment with the following critical parameters:

Inductance Value: All substitute parts must provide 2.5 µH inductance at 100 kHz test frequency to maintain circuit performance.

Current Rating: Substitute parts must support a minimum continuous current rating of 6.6 A. Parts with lower current ratings do not qualify as direct substitutes.

DC Resistance: Maximum DCR must not exceed 15.6 mOhm to ensure equivalent power dissipation characteristics and thermal performance.

Core Material and Shielding: All parts must utilize ferrite core material with shielding to maintain electromagnetic compatibility and prevent interference in the application circuit.

Mounting and Package: Surface mount configuration with nonstandard package dimensions is required for PCB assembly compatibility.

Compliance and Status: Active product status and RoHS compliance are mandatory for production applications.

The two identified substitute parts meet these criteria with specific trade-offs in current rating, saturation current, and operating temperature range that must be evaluated against application requirements.

Parameter Comparison

Parameter	SD8328-2R5-R (Eaton)	CDRH8D38NP-2R5NC (Sumida)	SRU8028-2R5Y (Bourns)
Inductance	2.5 µH	2.5 µH	2.5 µH
Tolerance	±30%	±30%	±30%
Current Rating (Amps)	6.6 A	6 A	4.5 A
Saturation Current (Isat)	4.5 A	6.5 A	4.2 A
DC Resistance (DCR)	15.6 mOhm Max	17.5 mOhm Max	13.6 mOhm
Core Material	Ferrite	Ferrite	Ferrite
Shielding	Shielded	Shielded	Shielded
Operating Temperature	-40°C to 125°C	-40°C to 100°C	-40°C to 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Size (L x W)	9.50mm x 8.30mm	8.00mm x 8.00mm	8.00mm x 8.00mm
Height (Max)	3.00mm	4.00mm	3.10mm
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

CDRH8D38NP-2R5NC (Sumida America Components Inc.):

This substitute part maintains the 2.5 µH inductance and ferrite shielded core configuration. The current rating of 6 A is 0.6 A lower than the primary part, representing a 9% reduction in current capacity. DC resistance increases to 17.5 mOhm maximum, a 1.9 mOhm increase that results in approximately 12% higher power dissipation at rated current. The saturation current of 6.5 A exceeds the primary part specification. Operating temperature range is limited to -40°C to 100°C, reducing the upper temperature margin by 25°C. Physical dimensions are smaller (8.00mm x 8.00mm versus 9.50mm x 8.30mm) with increased height (4.00mm versus 3.00mm). ROHS3 compliance status is current. This part is suitable for applications where the 6 A current rating is sufficient and the reduced operating temperature range does not conflict with system requirements.

SRU8028-2R5Y (Bourns Inc.):

This substitute part maintains the 2.5 µH inductance, ferrite shielded drum core wirewound construction, and full -40°C to 125°C operating temperature range. The current rating of 4.5 A is 2.1 A lower than the primary part, representing a 32% reduction in current capacity. DC resistance is 13.6 mOhm, which is 2 mOhm lower than the primary part specification, resulting in approximately 13% lower power dissipation. The saturation current of 4.2 A is lower than the primary part. Physical dimensions are smaller (8.00mm x 8.00mm) with comparable height (3.10mm). ROHS3 compliance and full temperature range support are provided. This part is suitable only for applications where the 4.5 A current rating is adequate and the lower saturation current does not limit circuit performance.

Frequently Asked Questions (FAQ)

Q: Can CDRH8D38NP-2R5NC be used as a direct replacement for SD8328-2R5-R in all applications?

A: The CDRH8D38NP-2R5NC provides equivalent inductance and core material but operates at 6 A maximum current versus 6.6 A for the primary part. Applications requiring continuous current above 6 A cannot use this substitute. The reduced upper operating temperature limit of 100°C versus 125°C must be verified against system thermal requirements.

Q: What is the impact of increased DC resistance in the Sumida part?

A: The CDRH8D38NP-2R5NC exhibits 17.5 mOhm maximum DCR compared to 15.6 mOhm for the SD8328-2R5-R. At 6 A continuous current, this results in approximately 12% higher resistive power dissipation. Thermal design calculations must account for this increased dissipation.

Q: Is the SRU8028-2R5Y suitable for high-current applications?

A: No. The SRU8028-2R5Y is rated for 4.5 A continuous current, which is 32% lower than the SD8328-2R5-R. This part is suitable only for applications where circuit current requirements do not exceed 4.5 A.

Q: Do all three parts have identical inductance values?

A: Yes. All three parts provide 2.5 µH inductance at 100 kHz test frequency with ±30% tolerance. Inductance matching is confirmed across all candidates.

Q: What are the physical compatibility considerations?

A: The SD8328-2R5-R measures 9.50mm x 8.30mm x 3.00mm. The CDRH8D38NP-2R5NC measures 8.00mm x 8.00mm x 4.00mm, and the SRU8028-2R5Y measures 8.00mm x 8.00mm x 3.10mm. Smaller footprint dimensions may allow component relocation on the PCB, but increased height in the Sumida part must be verified against available board space.

Q: Are all parts RoHS compliant?

A: Yes. The SD8328-2R5-R is RoHS Compliant. Both substitute parts are ROHS3 Compliant, which represents current regulatory compliance status.

Q: What is the saturation current significance for substitution?

A: Saturation current indicates the point at which inductor core material begins to saturate, reducing inductance. The SD8328-2R5-R has Isat of 4.5 A. The CDRH8D38NP-2R5NC provides 6.5 A saturation current, offering greater margin. The SRU8028-2R5Y provides 4.2 A saturation current, which is lower than the primary part and may limit operating margin in some applications.

Q: Can temperature range differences affect part selection?

A: Yes. The SD8328-2R5-R and SRU8028-2R5Y both support -40°C to 125°C operation. The CDRH8D38NP-2R5NC is limited to -40°C to 100°C. Applications requiring operation above 100°C cannot use the Sumida part.

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