Würth Elektronik 744065330 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744065330 is a 33 µH shielded drum core wirewound inductor rated for 1.6 A continuous current with a maximum DC resistance of 180 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is designed for applications requiring stable inductance performance at 100 kHz test frequency. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for long-term procurement and deployment in regulated applications. Equivalent parts are identified when they maintain identical inductance values, compatible current ratings, matching package dimensions, and equivalent thermal operating ranges.

Substiute Parts

744065330

Würth ElektronikIn Stock: 1654744065330 Datasheet

Current PartRFQ

SRU1028-330Y

Bourns Inc.In Stock: 2945SRU1028-330Y Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744065330 is determined by strict alignment with the following critical parameters: inductance value (33 µH), inductance tolerance (±30%), core material (ferrite), shielding configuration (shielded), package dimensions (10.00mm x 10.00mm x 3.10mm maximum height), mounting type (surface mount), and operating temperature range (-40°C to 125°C). The current rating and DC resistance are secondary selection criteria; substitute parts must maintain current ratings at or above 1.25 A and DC resistance values that do not exceed the application's thermal and efficiency requirements. All substitute parts must carry equivalent regulatory compliance (RoHS3, REACH Unaffected) and maintain the same self-resonant frequency specification of 12 MHz to ensure circuit performance consistency.

Parameter Comparison

Engineering Selection Recommendations

The Bourns Inc. SRU1028-330Y qualifies as a direct substitute for the Würth Elektronik 744065330 based on matching inductance, tolerance, core material, shielding, package geometry, and operating temperature specifications. Both components maintain Active product status with identical RoHS3 and REACH compliance certifications, ensuring regulatory continuity in procurement and deployment.

The SRU1028-330Y exhibits a lower DC resistance value of 139 mOhm compared to the 744065330's 180 mOhm maximum specification, resulting in reduced power dissipation and improved thermal performance in the same package footprint. However, the SRU1028-330Y carries a reduced current rating of 1.25 A versus the 744065330's 1.6 A specification. Selection between these parts depends on application current requirements: applications operating at or below 1.25 A continuous current may utilize the SRU1028-330Y without derating, while applications requiring the full 1.6 A rating must retain the 744065330.

Both components are packaged in Tape & Reel format suitable for automated assembly processes and maintain unlimited moisture sensitivity ratings, eliminating bake-out requirements prior to reflow soldering.

Frequently Asked Questions (FAQ)

Q: Can the SRU1028-330Y replace the 744065330 in all applications?

A: Substitution is valid only when the application's continuous current requirement does not exceed 1.25 A. The SRU1028-330Y is rated for 1.25 A continuous current with a saturation current of 1.2 A, compared to the 744065330's 1.6 A and 1.3 A ratings respectively. Applications requiring higher current must use the original 744065330.

Q: Are the package dimensions identical between these parts?

A: Yes. Both the 744065330 and SRU1028-330Y share identical nonstandard package dimensions of 10.00mm length, 10.00mm width, and 3.10mm maximum seated height. PCB footprints and assembly processes are directly compatible.

Q: What is the significance of the lower DC resistance in the SRU1028-330Y?

A: The SRU1028-330Y's 139 mOhm DC resistance is lower than the 744065330's 180 mOhm maximum specification. This results in reduced resistive losses and lower heat generation during operation, which may improve circuit efficiency and thermal performance in current-limited applications.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the 744065330 and SRU1028-330Y carry ROHS3 compliance and REACH Unaffected status. Both maintain Moisture Sensitivity Level 1 (Unlimited), eliminating special storage or handling requirements.

Q: What is the inductance tolerance for these parts?

A: Both parts carry ±30% inductance tolerance at the 100 kHz test frequency. This tolerance must be considered in circuit design to ensure performance across the specified inductance range.

Q: Are these parts suitable for automated assembly?

A: Yes. Both components are supplied in Tape & Reel packaging format, compatible with standard pick-and-place assembly equipment and reflow soldering processes.