SD53-330-R Equivalent & Substitute Parts Reference

Part Overview

The SD53-330-R is a 33 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 750 mA continuous current with a maximum DC resistance of 257 mOhm and operates across the temperature range of -40°C to 125°C. The part is RoHS compliant and currently active in production with inventory availability of 1027 pieces.

Equivalent and substitute parts are identified when alternative components meet the core functional requirements of the application while maintaining compatibility with the circuit design, PCB layout, and thermal management specifications.

Substiute Parts

SD53-330-R

Eaton - Electronics DivisionIn Stock: 1077SD53-330-R Datasheet

Current PartRFQ

SRU5028-330Y

Bourns Inc.In Stock: 2417SRU5028-330Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SD53-330-R are identified based on strict electrical and mechanical parameter matching within acceptable tolerances for the application category. The substitution logic is based on the following criteria:

Inductance Value: The substitute part must provide 33 µH inductance to maintain circuit frequency response and filtering characteristics.

Current Handling: The substitute part must support a minimum continuous current rating equal to or greater than 750 mA. Saturation current (Isat) must remain above the maximum expected operating current to prevent inductance collapse.

DC Resistance: The substitute part's DCR must not exceed the maximum specified value, as higher resistance increases power dissipation and heat generation. Lower DCR values are acceptable as they improve efficiency.

Core Material and Shielding: Both the main part and substitute must use ferrite core material with shielding to maintain electromagnetic compatibility and prevent interference with adjacent circuit elements.

Package Dimensions: The substitute part must fit the identical footprint (5.20 mm × 5.20 mm) and height (3.00 mm maximum) to ensure PCB compatibility without redesign.

Operating Temperature Range: The substitute part must support the full -40°C to 125°C operating temperature range.

Mounting Type: Surface mount compatibility is required for automated assembly processes.

Parameter Comparison

Engineering Selection Recommendations

Primary Part - SD53-330-R (Eaton): The SD53-330-R is the specified component with active production status and RoHS compliance. This part is suitable for applications requiring the exact inductance value with the specified current and resistance parameters. Current inventory of 1027 pieces supports immediate procurement.

Substitute Part - SRU5028-330Y (Bourns): The SRU5028-330Y from Bourns Inc. is electrically and mechanically compatible with the SD53-330-R for applications where the following conditions are met:

The application's peak current does not exceed 680 mA (the saturation current of the substitute). The SRU5028-330Y provides superior DC resistance performance at 203 mOhm compared to the 257 mOhm maximum of the SD53-330-R, resulting in lower power dissipation and improved thermal performance.

The wider inductance tolerance of ±30% (versus ±20% for the SD53-330-R) is acceptable for the circuit design. Both parts maintain identical package dimensions, operating temperature range, and shielding characteristics. The SRU5028-330Y carries ROHS3 compliance and has higher inventory availability at 2358 pieces.

Frequently Asked Questions (FAQ)

Q: Can the SRU5028-330Y replace the SD53-330-R in all applications?

A: The SRU5028-330Y is mechanically and electrically compatible for most applications. However, the saturation current of the SRU5028-330Y is 680 mA, which is lower than the SD53-330-R's 760 mA saturation current. If the application requires peak currents above 680 mA, the SD53-330-R must be used to prevent inductance degradation.

Q: What is the impact of the different DC resistance values?

A: The SRU5028-330Y has a DC resistance of 203 mOhm compared to the SD53-330-R's 257 mOhm maximum. Lower DC resistance reduces power dissipation (P = I²R), resulting in less heat generation and improved efficiency. This is a beneficial characteristic for thermal management.

Q: Are the package dimensions identical?

A: Yes. Both the SD53-330-R and SRU5028-330Y share identical footprint dimensions of 5.20 mm × 5.20 mm and maximum seated height of 3.00 mm. No PCB redesign is required for substitution.

Q: What is the significance of the inductance tolerance difference?

A: The SD53-330-R has ±20% tolerance while the SRU5028-330Y has ±30% tolerance. For applications with tight inductance specifications, the SD53-330-R provides better accuracy. For general filtering and energy storage applications, the wider tolerance of the SRU5028-330Y is typically acceptable.

Q: Are both parts RoHS compliant?

A: Yes. The SD53-330-R is RoHS compliant, and the SRU5028-330Y is ROHS3 compliant. Both meet current regulatory requirements for hazardous substance restrictions.

Q: Can these parts be used interchangeably in automated assembly?

A: Yes. Both parts are surface mount components supplied in Tape & Reel packaging, compatible with standard pick-and-place assembly equipment. Identical package dimensions ensure no tooling changes are required.