Würth Elektronik 7440320015 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7440320015 is a 1.5 µH unshielded drum core wirewound inductor rated for 660 mA continuous current with a maximum DC resistance of 130mOhm. This surface mount component is designed for applications requiring fixed inductance in compact 1210 (3225 Metric) packaging. The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent inductance values, core materials, and electrical performance parameters align within acceptable tolerances for the intended application.

Substiute Parts

7440320015

Würth ElektronikIn Stock: 29267440320015 Datasheet

Current PartRFQ

SDR0302-1R5ML

Bourns Inc.In Stock: 4623SDR0302-1R5ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7440320015 is determined by the following critical parameters:

• Inductance value of 1.5 µH with ±20% tolerance
• Ferrite drum core, wirewound construction
• Unshielded configuration
• Surface mount technology
• Operating temperature range of -40°C to 125°C
• ROHS3 compliance and REACH unaffected status

The Bourns SDR0302-1R5ML meets these core substitution criteria. Both parts share identical inductance specifications, ferrite core material, unshielded design, and equivalent environmental compliance ratings. Differences in current rating, DC resistance, and package dimensions are noted in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 7440320015 and Bourns SDR0302-1R5ML are active production components with ROHS3 compliance and REACH unaffected status. The Bourns substitute provides superior electrical performance with higher current rating (1.9 A vs. 660 mA), lower DC resistance (70mOhm vs. 130mOhm), and higher saturation current (2.3 A vs. 2.1 A). Selection between these parts depends on circuit current requirements and thermal dissipation constraints. Both parts maintain identical inductance specifications and operating temperature ranges, ensuring functional equivalence in applications within the 660 mA current envelope.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR0302-1R5ML directly replace the Würth 7440320015 in existing designs?

A: Yes, for applications operating at or below 660 mA. Both parts share identical inductance values, tolerance, core material, shielding configuration, and operating temperature range. The Bourns part offers additional current capacity and lower DC resistance, making it suitable for higher-current applications as well.

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

A: The Würth 7440320015 measures 3.20mm L x 2.50mm W x 2.30mm H (seated). The Bourns SDR0302-1R5ML measures 3.00mm L x 2.80mm W x 2.80mm H (seated). These dimensional variations may affect PCB layout and component placement in space-constrained designs.

Q: Are both parts compliant with environmental and regulatory requirements?

A: Yes. Both the Würth 7440320015 and Bourns SDR0302-1R5ML are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. Both are suitable for applications requiring these certifications.

Q: What is the significance of the DC resistance difference?

A: The Bourns SDR0302-1R5ML has lower DC resistance (70mOhm vs. 130mOhm), resulting in reduced resistive losses and lower heat dissipation at equivalent current levels. This characteristic may be advantageous in power-sensitive applications.

Q: Can the Würth part be used in place of the Bourns part?

A: The Würth 7440320015 can be used in applications where the circuit current does not exceed 660 mA. However, the higher DC resistance may result in increased power dissipation compared to the Bourns alternative.