Würth Elektronik 744043008 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744043008 is an 8.2 µH shielded drum core wirewound inductor rated for 1.25 A with a maximum DC resistance of 100 mOhm. This surface mount component operates across the temperature range of -40°C to 125°C and is packaged in the 1919 (4848 Metric) form factor. The part is currently active in production and maintains ROHS3 compliance with unlimited moisture sensitivity rating. Equivalent substitute parts are identified to support procurement flexibility, design redundancy, and supply chain continuity.

Substiute Parts

744043008

Würth ElektronikIn Stock: 1002744043008 Datasheet

Current PartRFQ

SRR4028-8R2Y

Bourns Inc.In Stock: 2128SRR4028-8R2Y Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Würth Elektronik 744043008 is determined by strict equivalence across the following critical parameters:

Inductance value of 8.2 µH with ±30% tolerance ensures functional compatibility in target circuits. Current rating of 1.25 A and saturation current of 1.05 A establish the maximum safe operating envelope. DC resistance of 100 mOhm maximum defines the resistive loss characteristics. The shielded drum core construction with ferrite material maintains electromagnetic performance. Surface mount packaging in the 1919 (4848 Metric) form factor ensures mechanical and electrical compatibility with existing PCB layouts. Operating temperature range of -40°C to 125°C and inductance measurement at 100 kHz define the operational environment. RoHS3 compliance and MSL 1 rating confirm regulatory and handling requirements.

The Bourns Inc. SRR4028-8R2Y meets all these criteria and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744043008 and Bourns Inc. SRR4028-8R2Y are active production components with identical electrical and mechanical specifications. Selection between these parts may be based on procurement availability, supply chain logistics, or inventory position. The Bourns SRR4028-8R2Y currently maintains higher inventory availability at 2100 pieces. Both components carry ROHS3 compliance, REACH unaffected status, and EAR99 export classification, confirming regulatory equivalence for industrial and commercial applications. No design modifications are required when substituting between these parts.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SRR4028-8R2Y be used as a direct replacement for the Würth Elektronik 744043008?

A: Yes. Both components share identical inductance values, current ratings, DC resistance specifications, package dimensions, and operating temperature ranges. No circuit modifications are required.

Q: Are there any differences in self-resonant frequency between these parts?

A: The Würth Elektronik 744043008 specifies a self-resonant frequency of 35 MHz, while the Bourns SRR4028-8R2Y specifies 45 MHz. Both values are within acceptable ranges for typical inductor applications. Circuit performance at frequencies approaching these limits should be evaluated independently.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. Moisture sensitivity level is 1 (unlimited) for both parts.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.189" L x 0.189" W (4.80mm x 4.80mm) with a maximum seated height of 0.118" (3.00mm). They are compatible with identical PCB footprints.

Q: What is the tolerance specification for inductance?

A: Both parts carry an inductance tolerance of ±30% at the 100 kHz test frequency. This tolerance must be considered in circuit design calculations.