Würth Elektronik 744045002 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744045002 is a 2.2 µH unshielded drum core wirewound inductor rated for 1.6 A continuous current with a maximum DC resistance of 110mOhm. This surface mount component is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production and ROHS3 compliant, making it suitable for modern electronic assemblies. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Substiute Parts

744045002

Würth ElektronikIn Stock: 1893744045002 Datasheet

Current PartRFQ

SDR0403-2R2ML

Bourns Inc.In Stock: 10153SDR0403-2R2ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744045002 is determined by the following critical parameters:

• Inductance value must match at 2.2 µH with ±20% tolerance
• Core material and shielding configuration must be identical (ferrite, unshielded, drum core)
• Operating temperature range must encompass or equal -40°C to 125°C
• Mounting type must be surface mount compatible
• Current rating must meet or exceed 1.6 A continuous operation
• DC resistance must not exceed 110 mOhm to maintain thermal and performance characteristics
• RoHS and MSL compliance must be maintained

The Bourns SDR0403-2R2ML meets these substitution criteria with equivalent inductance, core construction, temperature range, and compliance certifications. The substitute part provides superior current handling (2.6 A vs 1.6 A) and lower DC resistance (47 mOhm vs 110 mOhm), making it suitable for direct replacement in applications where the original part is unavailable.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744045002 and Bourns SDR0403-2R2ML are active production components with ROHS3 compliance and MSL 1 ratings, confirming suitability for modern manufacturing and assembly processes. The Bourns substitute provides enhanced electrical performance through higher current rating and reduced DC resistance, which results in lower power dissipation and improved thermal characteristics. Selection between these parts should be based on circuit current requirements, thermal budget constraints, and component availability. The substitute part is electrically and mechanically compatible for direct replacement in applications designed for the original part.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR0403-2R2ML directly replace the Würth Elektronik 744045002?

A: Yes. Both parts share identical inductance values, tolerance specifications, core construction, operating temperature range, and compliance certifications. The Bourns part provides superior current handling and lower DC resistance, making it suitable for direct substitution.

Q: What are the physical dimension differences between these parts?

A: The Würth part measures 4.50mm L × 3.20mm W × 2.90mm H (1812 metric package). The Bourns part measures 4.50mm L × 4.00mm W × 4.60mm H (nonstandard package). The increased width and height of the Bourns part must be verified against PCB layout constraints before substitution.

Q: How do the DC resistance values affect circuit performance?

A: The Bourns substitute has 47 mOhm maximum DC resistance compared to 110 mOhm for the original part. Lower DC resistance reduces I²R power losses and heat generation, improving efficiency and thermal performance in current-carrying applications.

Q: Are both parts suitable for high-temperature applications?

A: Yes. Both parts maintain specifications across the -40°C to 125°C operating temperature range with identical thermal ratings and MSL 1 moisture sensitivity levels.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant and REACH unaffected, confirming compliance with current environmental and hazardous substance regulations for electronic components.