Würth Elektronik 744902115 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744902115 is a 15 nH unshielded thin film inductor rated for 300 mA with a maximum DC resistance of 1 Ohm, packaged in 0603 (1608 Metric) surface mount format. This component is classified as obsolete, necessitating identification of equivalent alternatives for new designs and production continuity. Substitute parts must maintain the core electrical specifications while accommodating available packaging and performance variations.

Substiute Parts

744902115

Würth ElektronikIn Stock: 1009744902115 Datasheet

Current PartRFQ

744901115

Würth ElektronikIn Stock: 7209744901115 Datasheet

DirectRFQ

L0603150GGSTR

KYOCERA AVXIn Stock: 11562L0603150GGSTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744902115 is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 15 nH (exact match required)
• Inductance tolerance: ±2% (exact match required)
• Shielding type: Unshielded (exact match required)
• Operating temperature range: Minimum -40°C, maximum 125°C or greater
• RoHS3 compliance and REACH unaffected status

Secondary Compatibility Factors:

• Current rating: Must support minimum 300 mA
• DC resistance: Lower values preferred; 1 Ohm maximum acceptable
• Package format: 0603 (1608 Metric) preferred for direct replacement; smaller packages (0402) acceptable with board layout modification
• Surface mount mounting type (required)

Two substitute parts meet these criteria with documented trade-offs in current rating and package size.

Parameter Comparison

Engineering Selection Recommendations

L0603150GGSTR (KYOCERA AVX Accu-L®) – Preferred Direct Replacement

This part maintains identical package format (0603), current rating (300 mA), and inductance specifications as the main part. The DC resistance is superior at 600 mOhm maximum versus 1 Ohm maximum. Extended operating temperature range (-55°C to 125°C) provides additional margin. Active product status ensures long-term availability. ROHS3 compliance and REACH unaffected status match the original specification.

744901115 (Würth Elektronik WE-TCI) – Package-Constrained Alternative

This part shares manufacturer lineage and maintains identical inductance and tolerance specifications. However, the 0402 (1005 Metric) package requires PCB layout modification and represents a significant size reduction. Current rating is reduced to 130 mA, making this option unsuitable for applications requiring the full 300 mA specification. DC resistance increases to 1.8 Ohm maximum. Active product status and full compliance certifications are maintained. This substitute is applicable only when current requirements do not exceed 130 mA and board space constraints justify package downsizing.

Frequently Asked Questions (FAQ)

Q: Can the L0603150GGSTR directly replace the 744902115 without PCB modification?

A: Yes. Both parts use identical 0603 (1608 Metric) packaging, enabling direct footprint compatibility. Electrical specifications are equivalent or superior, with no design changes required.

Q: Is the 744901115 suitable for applications requiring 300 mA?

A: No. The 744901115 is rated for 130 mA maximum, which is insufficient for the original 300 mA specification. This part is applicable only for circuits designed for 130 mA or lower current levels.

Q: What are the implications of the different DC resistance values?

A: The main part specifies 1 Ohm maximum DCR. The L0603150GGSTR offers 600 mOhm maximum, reducing resistive losses and heat generation. The 744901115 specifies 1.8 Ohm maximum, increasing losses. DCR selection depends on circuit sensitivity to resistive effects and thermal constraints.

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

A: Yes. Both substitute parts are ROHS3 compliant and REACH unaffected, matching the original part's compliance status.

Q: What is the impact of package size reduction from 0603 to 0402?

A: The 0402 package (744901115) is physically smaller, requiring PCB layout redesign and potentially affecting assembly process parameters. Direct footprint substitution is not possible without board rework.

Q: Are there temperature range differences between substitutes?

A: The L0603150GGSTR extends the lower operating limit to -55°C versus -40°C for the main part and 744901115. This provides additional thermal margin for demanding environments.