Würth Elektronik 744761043C Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744761043C is a 4.3 nH unshielded drum core wirewound inductor rated for 700 mA with a maximum DC resistance of 70mOhm, packaged in 0603 (1608 Metric) surface mount format. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity for applications requiring 4.3 nH inductance in compact surface mount packages.

Substiute Parts

744761043C

Würth ElektronikIn Stock: 3744744761043C Datasheet

Current PartRFQ

LQW18AN4N3D00D

Murata ElectronicsIn Stock: 11986LQW18AN4N3D00D Datasheet

MFR RecommendedRFQ

LQW18AS4N3J00D

Murata ElectronicsIn Stock: 4731LQW18AS4N3J00D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 744761043C are qualified based on the following critical parameters:

• Inductance value: 4.3 nH (exact match required)
• Package / Case: 0603 (1608 Metric) surface mount (exact match required)
• Shielding type: Unshielded (exact match required)
• Operating temperature range: Minimum -40°C ~ 125°C or broader
• RoHS compliance: ROHS3 Compliant (exact match required)
• Current rating: Equal to or greater than 700 mA
• DC resistance: Equal to or less than 70mOhm Max

The two qualified substitutes are Murata Electronics LQW18AN4N3D00D and LQW18AS4N3J00D, both meeting the core electrical and mechanical requirements for direct substitution in the 0603 package format.

Parameter Comparison

Engineering Selection Recommendations

Both Murata Electronics substitutes meet the mandatory compliance and certification requirements for the Würth 744761043C. Selection between substitutes is determined by application-specific requirements:

Murata LQW18AN4N3D00D provides enhanced current handling capability at 850 mA with reduced DC resistance of 59mOhm Max and improved Q factor of 35 @ 250MHz. This part is suitable for applications requiring higher current margins or lower resistive losses. The extended operating temperature range of -55°C ~ 125°C provides additional thermal margin for extreme environment applications.

Murata LQW18AS4N3J00D matches the original part specifications with 700 mA current rating and 63mOhm Max DC resistance. This part includes AEC-Q200 automotive qualification, making it suitable for automotive and high-reliability applications. The inductance tolerance of ±5% aligns with the original part specification.

Both substitutes are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS coding, ensuring regulatory and trade compliance equivalence.

Frequently Asked Questions (FAQ)

Q: Can LQW18AN4N3D00D be used as a direct replacement for 744761043C?

A: Yes. Both parts share identical 4.3 nH inductance, 0603 (1608 Metric) package, unshielded configuration, and ROHS3 compliance. The LQW18AN4N3D00D provides superior current rating (850 mA vs 700 mA) and lower DC resistance (59mOhm vs 70mOhm), making it a compatible upgrade.

Q: What is the difference between the two Murata substitutes?

A: LQW18AN4N3D00D offers higher current capacity and lower DC resistance with broader temperature range (-55°C to 125°C). LQW18AS4N3J00D maintains exact current and temperature specifications as the original part and includes AEC-Q200 automotive qualification. Both maintain 4.3 nH inductance and 0603 package compatibility.

Q: Are there any package dimension differences between these parts?

A: The Würth 744761043C measures 0.065" L x 0.045" W (1.65mm x 1.15mm) with 0.043" (1.10mm) seated height. Murata parts measure 0.063" L x 0.031" W (1.60mm x 0.80mm) with 0.039" (1.00mm) seated height. Both are 0603 (1608 Metric) format and suitable for standard 0603 footprints.

Q: Do all three parts meet RoHS and REACH requirements?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8504.50.8000.

Q: Which substitute should be selected for automotive applications?

A: LQW18AS4N3J00D includes AEC-Q200 automotive qualification and is the appropriate selection for automotive and high-reliability applications requiring formal automotive component certification.