Würth Elektronik 744776115 Fixed Inductor - Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744776115 is a 15 µH unshielded drum core wirewound inductor rated for 2.47 A continuous current with 80 mOhm maximum DC resistance. This surface mount component operates across the -40°C to 125°C temperature range and is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Substiute Parts

744776115

Würth ElektronikIn Stock: 2421744776115 Datasheet

Current PartRFQ

SDR1006-150ML

Bourns Inc.In Stock: 1874SDR1006-150ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744776115 is determined by the following critical parameters:

• Inductance Value: Must be 15 µH with ±20% tolerance
• Current Rating: Minimum 2.25 A continuous current capability
• DC Resistance: Maximum 80 mOhm
• Core Material & Type: Ferrite drum core, unshielded construction
• Mounting Configuration: Surface mount, nonstandard package
• Temperature Range: -40°C to 125°C operation
• Compliance: RoHS3 compliant, REACH unaffected status

The Bourns SDR1006-150ML meets all substitution criteria within these electrical and mechanical boundaries.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744776115 and Bourns SDR1006-150ML are active production components with identical RoHS3 compliance and REACH unaffected status. The SDR1006-150ML operates at 2.25 A continuous current, which is 0.22 A lower than the primary part's 2.47 A rating. This difference requires circuit-level evaluation to confirm adequate current margin for the intended application. Both components share identical DC resistance specifications, inductance values, tolerance bands, and operating temperature ranges. Selection between these parts should be based on availability, lead time, and application current requirements within the specified 2.25 A to 2.47 A range.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR1006-150ML directly replace the Würth Elektronik 744776115?

A: Yes, within applications where the circuit current requirement does not exceed 2.25 A. Both parts maintain identical inductance, DC resistance, core type, and temperature specifications. The 0.22 A current rating difference must be evaluated against actual circuit operating conditions.

Q: Are there dimensional differences between these inductors?

A: Minor dimensional variations exist. The Würth part measures 10.00mm L × 9.00mm W × 5.90mm H (seated), while the Bourns part measures 9.80mm L × 9.80mm W × 5.80mm H (seated). Both are classified as nonstandard packages and should be verified for PCB layout compatibility.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the 744776115 and SDR1006-150ML are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. ECCN and HTSUS classifications are identical.

Q: What is the primary substitution criterion for these inductors?

A: The 15 µH inductance value with ±20% tolerance is the primary electrical criterion. Secondary criteria include the 80 mOhm maximum DC resistance, ferrite drum core construction, unshielded configuration, and surface mount package type. Current rating compatibility must be confirmed for the specific application.

Q: Are there frequency response differences?

A: The parts exhibit different self-resonant frequencies. The Würth part resonates at 20 MHz, while the Bourns part resonates at 16 MHz. The Bourns part also specifies Q factor of 30 at 2.52 MHz. These differences may affect high-frequency circuit behavior and should be evaluated for frequency-dependent applications.