Würth Elektronik 744355047 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744355047 is a 470 nH shielded wirewound inductor rated for 26 A continuous current with 0.9 mOhm DC resistance. This component is designed for high-current, low-inductance applications requiring electromagnetic shielding and thermal stability across industrial temperature ranges. The part maintains Active product status with full RoHS3 compliance and AEC-Q200 automotive qualification. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within specified parameter tolerances.

Substiute Parts

744355047

Würth ElektronikIn Stock: 2022744355047 Datasheet

Current PartRFQ

SRP1250-R47M

Bourns Inc.In Stock: 3155SRP1250-R47M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744355047 is determined by the following critical parameters:

• Inductance value of 470 nH with ±20% tolerance
• Shielded construction to maintain electromagnetic isolation
• Surface mount package configuration
• Minimum current rating of 26 A continuous
• DC resistance not exceeding 0.9 mOhm maximum
• Operating temperature range compatibility
• RoHS3 compliance and equivalent regulatory status

The Bourns SRP1250-R47M meets these substitution criteria. Both parts share identical inductance specifications, shielded construction, surface mount configuration, and RoHS3 compliance. The substitute part exceeds the current rating requirement (38 A vs. 26 A) and saturation current specification (65 A vs. 50 A), providing operational margin. DC resistance of the substitute (1.3 mOhm max) is within acceptable tolerance for this application category.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744355047 and Bourns SRP1250-R47M are Active status components with full RoHS3 compliance and equivalent regulatory standing. The 744355047 carries AEC-Q200 automotive qualification; this certification is not specified for the SRP1250-R47M. Selection between these parts should be based on application-specific requirements for automotive qualification and thermal performance at the upper temperature boundary (155°C vs. 150°C maximum).

The Bourns substitute provides enhanced current handling capacity and saturation margin, making it suitable for applications requiring operational headroom. The Würth part maintains the specified thermal ceiling and automotive-grade qualification. Both parts are available in production quantities with equivalent supply status.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SRP1250-R47M directly replace the Würth Elektronik 744355047?

A: Yes, within the specified electrical and mechanical parameters. Both parts share identical inductance values, tolerance, shielding, mounting type, and package configuration. The substitute part exceeds current and saturation ratings, providing operational margin.

Q: What is the impact of the 0.4 mOhm difference in DC resistance?

A: The Bourns substitute has a maximum DC resistance of 1.3 mOhm compared to 0.9 mOhm for the Würth part. This 44% increase results in proportionally higher resistive losses. Applications sensitive to power dissipation or thermal performance should evaluate this parameter against circuit requirements.

Q: Are there temperature range limitations when substituting?

A: The Würth part operates to 155°C maximum; the Bourns substitute to 150°C. Applications requiring operation above 150°C must use the original Würth part. Both parts support the -40°C lower boundary.

Q: Does the Bourns substitute maintain automotive qualification?

A: AEC-Q200 qualification is specified for the Würth 744355047. This certification is not listed for the Bourns SRP1250-R47M. Automotive applications requiring AEC-Q200 compliance should use the original Würth part.

Q: Are physical dimensions compatible?

A: Both parts are surface mount with nonstandard packages. The Würth part measures 13.00 mm × 12.80 mm × 5.00 mm (max height); the Bourns part measures 13.90 mm × 14.60 mm × 5.90 mm (max height). PCB layout and clearance requirements must accommodate the larger Bourns footprint.