Würth Elektronik 744032331 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744032331 is a 330 µH unshielded drum core wirewound inductor rated for 65 mA continuous current with a maximum DC resistance of 16.5Ohm. This surface mount component in 1210 (3225 Metric) package is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent inductance values, core materials, and operating temperature ranges are maintained while accommodating variations in current ratings, DC resistance, and package dimensions within acceptable engineering tolerances.

Substiute Parts

744032331

Würth ElektronikIn Stock: 3932744032331 Datasheet

Current PartRFQ

SDR0302-331KL

Bourns Inc.In Stock: 6518SDR0302-331KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns Inc. SDR0302-331KL qualifies as a substitute for the Würth Elektronik 744032331 based on the following alignment of critical parameters:

Matching Parameters:

• Inductance: 330 µH (identical)
• Inductance Tolerance: ±10% (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)

Acceptable Variations:

• Current Rating: 130 mA (substitute) vs. 65 mA (main part) — substitute provides higher current capacity
• DC Resistance: 10Ohm Max (substitute) vs. 16.5Ohm Max (main part) — substitute provides lower resistance
• Package Dimensions: 3.00mm x 2.80mm x 2.80mm (substitute) vs. 3.20mm x 2.50mm x 2.30mm (main part) — minor dimensional differences within surface mount compatibility
• Packaging Format: Cut Tape & Digi-Reel (substitute) vs. Tape & Reel (main part) — both suitable for automated assembly

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744032331 and Bourns Inc. SDR0302-331KL are active production components with ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications. The Bourns substitute provides enhanced electrical performance through higher current rating (130 mA vs. 65 mA) and lower DC resistance (10Ohm Max vs. 16.5Ohm Max), making it suitable for applications where the original part's current capacity may be limiting. The substitute maintains identical inductance, tolerance, core material, shielding configuration, and operating temperature range. Selection between these parts should be based on application current requirements and available board space, as minor package dimension differences exist.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR0302-331KL directly replace the Würth Elektronik 744032331 in existing designs?

A: Yes, the substitute maintains the same inductance value (330 µH), tolerance (±10%), core material (ferrite), shielding (unshielded), and operating temperature range (-40°C ~ 125°C). The substitute's higher current rating and lower DC resistance represent performance improvements. Minor package dimension variations (3.00mm x 2.80mm vs. 3.20mm x 2.50mm) must be verified against PCB layout constraints.

Q: What are the key differences between these two inductors?

A: The primary differences are current rating (130 mA substitute vs. 65 mA main part), DC resistance (10Ohm Max substitute vs. 16.5Ohm Max main part), and package dimensions. The substitute offers superior electrical performance with higher current capacity and lower resistance losses.

Q: Are both parts suitable for the same operating temperature range?

A: Yes, both components operate across the identical temperature range of -40°C to 125°C, ensuring thermal compatibility in equivalent applications.

Q: What packaging formats are available for each part?

A: The Würth Elektronik 744032331 is supplied in Tape & Reel (TR) format. The Bourns SDR0302-331KL is available in Cut Tape (CT) & Digi-Reel format. Both formats support automated assembly processes.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes, both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99, meeting equivalent regulatory requirements for industrial applications.