Würth Elektronik 744032008 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744032008 is an 8.2 µH unshielded drum core wirewound inductor rated for 390 mA continuous current with a maximum DC resistance of 450 mOhm. This surface mount component is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production and ROHS3 compliant, making it suitable for modern electronic assemblies. Substitute parts may be required due to inventory constraints, lead time considerations, or application-specific performance requirements within the allowed electrical and mechanical parameter ranges.

Substiute Parts

744032008

Würth ElektronikIn Stock: 1897744032008 Datasheet

Current PartRFQ

SDR0302-8R2ML

Bourns Inc.In Stock: 17297SDR0302-8R2ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Würth Elektronik 744032008 is permissible with the Bourns Inc. SDR0302-8R2ML based on the following critical parameters:

Matching Parameters:

• Inductance value: 8.2 µH (identical)
• Inductance tolerance: ±20% (identical)
• Core material: Ferrite (identical)
• Shielding: Unshielded (identical)
• Operating temperature range: -40°C ~ 125°C (identical)
• Mounting type: Surface Mount (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

Allowable Variations: The substitute part exhibits improved electrical performance characteristics while maintaining functional compatibility. The SDR0302-8R2ML provides higher current rating (900 mA vs. 390 mA), lower DC resistance (200 mOhm vs. 450 mOhm), and higher saturation current (1.05 A vs. 950 mA). These parameters represent enhanced capability within the same inductance and tolerance specification.

Package Consideration: The substitute part uses a nonstandard package (3.00mm x 2.80mm x 2.80mm) compared to the standard 1210 package (3.20mm x 2.50mm x 2.30mm). Physical footprint differences require PCB layout verification before implementation.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744032008 and Bourns Inc. SDR0302-8R2ML are active production components with ROHS3 compliance and unlimited moisture sensitivity rating, confirming suitability for current manufacturing standards and environmental regulations.

The SDR0302-8R2ML substitute provides superior electrical performance with doubled current rating and reduced DC resistance, making it suitable for applications where the original part's 390 mA rating may approach operational limits. The lower DCR reduces power dissipation and heat generation in the inductor.

Selection between these parts should be based on PCB layout constraints. The substitute part's nonstandard package dimensions (3.00mm x 2.80mm footprint with 2.80mm height) differ from the standard 1210 package, requiring verification that the physical footprint accommodates the application's space requirements and assembly process capabilities.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR0302-8R2ML directly replace the Würth Elektronik 744032008 in all applications?

A: Both parts share identical inductance (8.2 µH), tolerance (±20%), core material (ferrite), shielding (unshielded), and operating temperature range (-40°C ~ 125°C). The substitute provides enhanced current handling and lower resistance. However, the nonstandard package dimensions require PCB layout verification before implementation.

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

A: The substitute part (SDR0302-8R2ML) offers higher current rating (900 mA vs. 390 mA), lower DC resistance (200 mOhm vs. 450 mOhm), and higher saturation current (1.05 A vs. 950 mA). These represent performance improvements within the same inductance specification.

Q: Are there packaging compatibility concerns?

A: Yes. The Würth part uses standard 1210 package (3.20mm x 2.50mm x 2.30mm height), while the Bourns substitute uses a nonstandard package (3.00mm x 2.80mm x 2.80mm height). The increased height and different footprint dimensions require PCB design review and potential assembly process adjustments.

Q: Do both parts meet current regulatory requirements?

A: Both parts are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1), confirming compliance with current environmental and manufacturing standards.

Q: Which part should be selected for new designs?

A: Selection depends on application current requirements and available PCB space. For applications requiring the full 390 mA rating with standard 1210 package compatibility, use the Würth Elektronik 744032008. For applications where higher current capability and lower resistance are beneficial and nonstandard package dimensions are acceptable, the Bourns SDR0302-8R2ML is suitable.