SD8328-3R3-R Equivalent & Substitute Parts

Part Overview

The SD8328-3R3-R is a 3.3 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is designed for applications requiring fixed inductance with moderate current handling capability. The part is currently in active production status with 981 pieces available in new original inventory.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining compatibility with the application's mechanical and thermal requirements.

Substiute Parts

SD8328-3R3-R

Eaton - Electronics DivisionIn Stock: 1068SD8328-3R3-R Datasheet

Current PartRFQ

SRU8028-3R3Y

Bourns Inc.In Stock: 6946SRU8028-3R3Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SD8328-3R3-R is determined by the following critical parameters:

Electrical Equivalence Criteria:

• Inductance value: 3.3 µH (within ±30% tolerance specification)
• Core material: Ferrite drum core construction
• Shielding: Shielded configuration required
• DC Resistance: Must not exceed 18 mOhm maximum

Mechanical Compatibility Criteria:

• Mounting type: Surface mount only
• Package classification: Nonstandard drum core form factor
• Operating temperature range: -40°C to 125°C minimum

Compliance Requirements:

• RoHS compliance status (RoHS or ROHS3)
• Moisture sensitivity level: MSL 1 or equivalent

The SRU8028-3R3Y from Bourns Inc. meets the electrical and mechanical criteria for substitution. However, the current rating differential (3.6 A versus 6.1 A) and saturation current difference (3.5 A versus 4 A) must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: SD8328-3R3-R

The SD8328-3R3-R is the specified component with active production status and adequate inventory availability (981 pieces). This part is RoHS compliant and rated for 6.1 A continuous current with 4 A saturation current.

Substitute Part: SRU8028-3R3Y

The SRU8028-3R3Y from Bourns Inc. is electrically equivalent in inductance value and tolerance. Both parts feature ferrite drum core construction, shielded configuration, and identical operating temperature range. The Bourns part carries ROHS3 compliance status.

Selection Criteria:

The SRU8028-3R3Y is suitable as a substitute when:

• Application current requirements do not exceed 3.6 A continuous operation
• Saturation current margin of 3.5 A is acceptable for the circuit design
• Smaller physical footprint (8.00mm x 8.00mm versus 9.50mm x 8.30mm) is beneficial for PCB layout
• Lower DC resistance (17.5 mOhm) provides marginal advantage in power dissipation

The SD8328-3R3-R remains the preferred selection when:

• Application requires the full 6.1 A current rating
• Higher saturation current margin (4 A) is necessary
• Original equipment manufacturer specification requires Eaton components

Both parts are MSL 1 rated and suitable for unlimited moisture exposure conditions.

Frequently Asked Questions (FAQ)

Q: Can the SRU8028-3R3Y replace the SD8328-3R3-R in all applications?

A: The SRU8028-3R3Y is electrically equivalent in inductance value and tolerance. However, substitution is limited by current rating. The Bourns part is rated for 3.6 A continuous current versus 6.1 A for the Eaton part. Verify that application current requirements do not exceed 3.6 A before substitution.

Q: What is the difference in DC resistance between these parts?

A: The SD8328-3R3-R has a maximum DC resistance of 18 mOhm. The SRU8028-3R3Y has a DC resistance of 17.5 mOhm. The Bourns part exhibits lower resistance, resulting in reduced power dissipation in the inductor winding.

Q: Are there physical size differences that affect PCB layout?

A: Yes. The SD8328-3R3-R measures 9.50mm length by 8.30mm width. The SRU8028-3R3Y measures 8.00mm length by 8.00mm width. The Bourns part has a smaller footprint, which may provide layout advantages. Height difference is negligible (3.00mm versus 3.10mm).

Q: Do both parts meet RoHS requirements?

A: Yes. The SD8328-3R3-R is RoHS compliant. The SRU8028-3R3Y is ROHS3 compliant. Both parts satisfy RoHS environmental requirements.

Q: What is the saturation current specification, and why does it matter?

A: Saturation current (Isat) is the DC current level at which the inductor's inductance begins to degrade. The SD8328-3R3-R has Isat of 4 A. The SRU8028-3R3Y has Isat of 3.5 A. Applications operating near saturation current require the higher-rated Eaton part to maintain inductance stability.

Q: Are both parts suitable for the full -40°C to 125°C temperature range?

A: Yes. Both the SD8328-3R3-R and SRU8028-3R3Y are rated for -40°C to 125°C operating temperature range.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean?

A: MSL 1 indicates the lowest moisture sensitivity level. Both parts can be stored and handled without moisture bake-out requirements and have unlimited shelf life under normal conditions.