Würth Elektronik 744032003 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744032003 is a 3.3 µH unshielded drum core wirewound inductor rated for 580 mA continuous current with a maximum DC resistance of 200mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is designed for applications requiring compact, high-frequency performance in the 1210 (3225 Metric) package format. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required for design flexibility, supply chain alternatives, or inventory management.

Substiute Parts

744032003

Würth ElektronikIn Stock: 2529744032003 Datasheet

Current PartRFQ

SDR0302-3R3ML

Bourns Inc.In Stock: 5599SDR0302-3R3ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744032003 is determined by matching the following critical parameters: inductance value of 3.3 µH with ±20% tolerance, ferrite drum core construction, unshielded configuration, surface mount technology, and compliance with RoHS3 and REACH requirements. The substitute part SDR0302-3R3ML meets these core electrical and mechanical criteria. While the substitute exhibits different current ratings, saturation characteristics, and package dimensions, these variations remain within acceptable engineering tolerances for applications where the primary inductance and core material specifications are the controlling factors.

Parameter Comparison

Engineering Selection Recommendations

Both the 744032003 and SDR0302-3R3ML maintain active product status with full RoHS3 compliance and REACH unaffected designation, confirming regulatory equivalence for industrial and commercial applications. The SDR0302-3R3ML provides superior current handling capability at 1.4 A versus 580 mA, with lower DC resistance of 110mOhm compared to 200mOhm maximum. Selection between these parts depends on circuit current requirements and thermal performance priorities. The 744032003 is appropriate for applications operating at or below 580 mA, while the SDR0302-3R3ML accommodates higher current loads with reduced resistive losses. Both components share identical inductance values, tolerance specifications, ferrite core construction, and operating temperature range, ensuring functional equivalence in inductance-dependent circuit behavior.

Frequently Asked Questions (FAQ)

Q: Can SDR0302-3R3ML replace 744032003 in existing designs? A: Yes, provided the circuit current requirement does not exceed 580 mA. The SDR0302-3R3ML is rated for 1.4 A and exhibits lower DC resistance, making it suitable for equivalent or lower-current applications. Both parts share identical inductance values, tolerance, core material, and operating temperature specifications.

Q: What are the package dimension differences between these parts? A: The 744032003 measures 0.126" L x 0.098" W x 0.091" H (3.20mm x 2.50mm x 2.30mm). The SDR0302-3R3ML measures 0.118" L x 0.110" W x 0.110" H (3.00mm x 2.80mm x 2.80mm). These dimensional variations may affect PCB layout and clearance considerations in space-constrained applications.

Q: Are both parts suitable for high-frequency applications? A: Both components are unshielded ferrite drum core inductors with self-resonant frequencies above 38 MHz, supporting high-frequency circuit operation. The 744032003 exhibits a self-resonant frequency of 38 MHz, while the SDR0302-3R3ML reaches 68 MHz, providing extended high-frequency performance.

Q: Do these parts require special handling or storage conditions? A: Both parts carry Moisture Sensitivity Level (MSL) 1 rating, indicating unlimited shelf life without moisture control requirements. Standard ESD precautions apply to all surface mount components during handling and assembly.

Q: What compliance certifications apply to both parts? A: Both the 744032003 and SDR0302-3R3ML are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for industrial electronics manufacturing.