Würth Elektronik 744902015 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744902015 is a 1.5 nH unshielded thin film inductor designed for surface mount applications in the 0603 (1608 Metric) package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement planning. The part delivers 800 mA current rating with 200mOhm maximum DC resistance and operates across the -40°C to 125°C temperature range.

Substiute Parts

744902015

Würth ElektronikIn Stock: 1007744902015 Datasheet

Current PartRFQ

744901015

Würth ElektronikIn Stock: 951744901015 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744902015 is determined by the following critical parameters:

• Inductance Value: Must be 1.5 nH with tolerance ±0.1 nH
• DC Resistance: Must not exceed 200 mOhm
• Shielding Type: Must be unshielded
• Series Classification: WE-TCI thin film inductor series
• Operating Temperature Range: Must support -40°C to 125°C
• RoHS Compliance: Must maintain ROHS3 compliance status

The substitute part 744901015 shares the same inductance specification, DC resistance rating, shielding configuration, and temperature operating range. However, it differs in package size (0402 vs. 0603), current rating (700 mA vs. 800 mA), and product status (Active vs. Obsolete). These differences establish a conditional substitution relationship dependent on application requirements.

Parameter Comparison

Engineering Selection Recommendations

The 744901015 serves as an active production alternative to the obsolete 744902015. Both components maintain identical inductance values, DC resistance specifications, and operating temperature ranges, ensuring electrical compatibility at the core functional level.

Selection between these parts depends on application-specific constraints:

Use 744902015 (if available from inventory): Applications requiring the larger 0603 package footprint and 800 mA current capacity. Existing designs with PCB layouts optimized for 0603 dimensions.

Use 744901015: New designs or redesigns where the smaller 0402 package footprint is acceptable. Applications where current demand does not exceed 700 mA. Designs requiring active product status and ongoing manufacturer support.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), supporting equivalent regulatory and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can 744901015 directly replace 744902015 in existing designs?

A: Electrical substitution is valid if application current requirements do not exceed 700 mA. PCB layout modification is required due to package size difference (0603 to 0402). Footprint redesign and revalidation are necessary steps.

Q: What is the primary difference between these two parts?

A: The main differences are package size (0603 vs. 0402), current rating (800 mA vs. 700 mA), and product status (Obsolete vs. Active). Inductance, DC resistance, and operating temperature specifications are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both 744902015 and 744901015 are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory standards.

Q: Why is 744902015 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 744901015 represents the active production line continuation within the WE-TCI series.

Q: Can I use 744901015 if my circuit requires 800 mA?

A: No. The 744901015 is rated for 700 mA maximum current. Exceeding this rating violates component specifications. The original 744902015 or an alternative 800 mA rated part is required for this application.

Q: Are there any frequency-related differences?

A: Self-resonant frequency is identical at 10 GHz for both parts. Q factor measurements differ due to different test frequencies (300 MHz vs. 500 MHz), reflecting package-specific characteristics rather than fundamental performance differences.