Würth Elektronik 744032001 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744032001 is a 1 µH unshielded drum core wirewound inductor rated for 750 mA continuous current with a maximum DC resistance of 100 mOhm. This surface mount component is designed for applications requiring low inductance values with controlled impedance characteristics. The part is currently active in production and ROHS3 compliant. Substitute parts may be required due to inventory constraints, regional availability, or specific application performance requirements within compatible electrical and mechanical parameters.

Substiute Parts

744032001

Würth ElektronikIn Stock: 1466744032001 Datasheet

Current PartRFQ

SDR0302-1R0ML

Bourns Inc.In Stock: 6232SDR0302-1R0ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Würth Elektronik 744032001 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 1 µH
• Inductance tolerance: ±20%
• Core material: Ferrite
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Operating temperature range: -40°C to 125°C minimum
• RoHS compliance: ROHS3 Compliant

Allowable Variation Parameters:

• Current rating: Must equal or exceed 750 mA
• DC resistance: Must not exceed 100 mOhm
• Package dimensions: Physical compatibility with 1210 (3225 Metric) footprint or equivalent
• Saturation current: May vary provided rated current is maintained

The Bourns SDR0302-1R0ML meets all mandatory matching parameters and exceeds the current rating requirement at 2.1 A, making it a valid electrical substitute within the specified tolerance band.

Parameter Comparison

Engineering Selection Recommendations

The Bourns SDR0302-1R0ML is electrically qualified as a substitute for the Würth Elektronik 744032001 based on matching inductance, tolerance, core material, shielding, and temperature range specifications. Both components maintain ROHS3 compliance and MSL Level 1 ratings.

The substitute part provides superior electrical performance with lower DC resistance (60 mOhm vs. 100 mOhm) and higher current rating (2.1 A vs. 750 mA), reducing thermal stress in the application. However, the saturation current of the substitute (2.7 A) is lower than the original part (3.2 A), requiring verification that peak transient currents remain below this threshold.

Physical dimensions require PCB layout verification. The substitute is 0.5 mm taller (2.80 mm vs. 2.30 mm seated height) and has slightly different length and width dimensions. Confirm adequate clearance above the component and verify that the footprint variation does not conflict with adjacent components or assembly constraints.

Both parts are active products with established supply chains and full compliance documentation available.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR0302-1R0ML be used as a direct replacement for the Würth Elektronik 744032001?

A: Electrical substitution is valid within the specified tolerance band. The substitute meets or exceeds all critical electrical parameters. Physical layout verification is required due to dimensional differences in height and footprint.

Q: What is the primary difference between these two inductors?

A: The Bourns part offers lower DC resistance and higher current rating, providing better thermal performance. The Würth part has higher saturation current and a lower profile. Selection depends on application current requirements and PCB space constraints.

Q: Are there any compliance or certification concerns with substitution?

A: Both parts are ROHS3 compliant, MSL Level 1, and carry identical operating temperature ratings. No compliance barriers exist for substitution.

Q: Does the height difference affect PCB assembly?

A: The Bourns part is 0.5 mm taller. Verify clearance with adjacent components, conformal coating processes, and any mechanical constraints in the assembly.

Q: What happens if saturation current is exceeded?

A: Exceeding saturation current causes inductance to drop significantly and core loss to increase. The Bourns substitute has a lower saturation threshold (2.7 A vs. 3.2 A). Confirm that application peak currents remain below 2.7 A.

Q: Are packaging quantities compatible?

A: Both parts are supplied in Tape & Reel (TR) packaging suitable for automated assembly. Verify reel specifications with your procurement department.