Würth Elektronik 744777910 Fixed Inductor - Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744777910 is a 10 µH shielded drum core wirewound inductor rated for 2 A continuous current with a maximum DC resistance of 49 mOhm. This component is designed for surface mount applications requiring compact form factor and electromagnetic shielding. The part is active in production with full RoHS3 compliance and AEC-Q200 automotive qualification. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Substiute Parts

744777910

Würth ElektronikIn Stock: 1420744777910 Datasheet

Current PartRFQ

P1167.103NLT

Pulse ElectronicsIn Stock: 8369P1167.103NLT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Pulse Electronics P1167.103NLT qualifies as a direct substitute based on the following critical parameters:

• Inductance Match: Both parts specify 10 µH with ±20% tolerance
• Current Rating Match: Both rated for 2 A continuous current
• DC Resistance Compatibility: Substitute DCR of 50 mOhm Max is within acceptable tolerance relative to the 49 mOhm Max specification
• Shielding: Both parts feature shielded construction
• Surface Mount Compatibility: Both are surface mount nonstandard packages with identical seated height of 0.177" (4.50mm)
• Compliance Alignment: Both parts are RoHS3 compliant with MSL 1 rating and REACH unaffected status

Substitution is valid when the application does not require AEC-Q200 certification or when the substitute's extended operating temperature range (-40°C to 130°C) provides additional margin.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The Würth Elektronik 744777910 is recommended for applications requiring AEC-Q200 automotive qualification. This part maintains active production status with established supply chain availability.

Substitute Selection: The Pulse Electronics P1167.103NLT is suitable for applications where AEC-Q200 certification is not a requirement. The substitute provides equivalent electrical performance with a 5°C extended upper operating temperature limit. The saturation current differential (2.6 A versus 2.1 A) should be evaluated in applications operating near the 2 A continuous rating threshold.

Both parts maintain RoHS3 compliance and unlimited moisture sensitivity rating, ensuring compatibility with standard PCB assembly processes and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can the Pulse Electronics P1167.103NLT replace the Würth Elektronik 744777910 in automotive applications?

A: The substitute part is electrically and mechanically compatible. However, if AEC-Q200 certification is a design requirement, the Würth Elektronik part must be used. Verify certification requirements with your design specification.

Q: What is the significance of the 1 mOhm difference in DC resistance?

A: The DCR difference (49 mOhm versus 50 mOhm) represents a 2% variance within typical circuit tolerance margins. Both specifications fall within acceptable limits for general power distribution and filtering applications.

Q: Are the physical dimensions interchangeable?

A: Both parts share identical seated height (0.177" / 4.50mm) and nonstandard package footprints. Verify PCB layout compatibility with the length and width dimensions: Würth (7.30mm x 7.30mm) versus Pulse (7.54mm x 7.54mm). The 0.24mm difference per side may require layout verification in space-constrained designs.

Q: What is the impact of the different self-resonant frequencies?

A: The Pulse part exhibits a higher self-resonant frequency (26 MHz versus 23 MHz), indicating different core material or winding characteristics. This difference is relevant only in high-frequency filtering applications above 10 MHz.

Q: Do both parts require the same moisture handling procedures?

A: Yes. Both parts carry MSL 1 (Unlimited) rating, eliminating moisture sensitivity concerns and allowing standard storage and handling without desiccant requirements.