Würth Elektronik 744777112 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744777112 is a 12 µH shielded drum core wirewound inductor rated for 1.82 A continuous current with a maximum DC resistance of 58 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and carries AEC-Q200 automotive qualification. The part is actively manufactured and available in high volume, making it suitable for applications requiring stable inductance performance in compact form factors. Substitute parts may be required due to inventory constraints, supply chain disruptions, or specific application requirements that align with the electrical and mechanical parameters of this inductor category.

Substiute Parts

744777112

Würth ElektronikIn Stock: 1098744777112 Datasheet

Current PartRFQ

7447779112

Würth ElektronikIn Stock: 22717447779112 Datasheet

MFR RecommendedRFQ

P1167.123NLT

Pulse ElectronicsIn Stock: 5136P1167.123NLT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 744777112 are qualified based on the following critical parameters:

• Inductance Value: 12 µH (exact match required)
• Tolerance: ±20% (matching tolerance specification)
• Current Rating: Minimum 1.82 A (equal or greater)
• DC Resistance: Maximum 58 mOhm (equal or lower)
• Shielding: Shielded construction (electromagnetic containment requirement)
• Mounting Type: Surface Mount (assembly compatibility)
• Operating Temperature Range: Minimum -40°C to 125°C coverage
• Package Classification: Nonstandard form factor with compatible footprint dimensions

The substitute parts listed below meet these electrical and mechanical criteria, ensuring functional equivalence within the specified application constraints.

Parameter Comparison

Engineering Selection Recommendations

Würth Elektronik 7447779112: This part is a direct electrical equivalent to the 744777112, maintaining identical inductance, tolerance, current rating, DC resistance, and operating temperature specifications. Both components are manufactured by Würth Elektronik within the WE-PD series family and carry AEC-Q200 automotive qualification. The 7447779112 is designated as WE-PD Robust variant and provides equivalent performance with higher inventory availability (2170 pcs vs. 1020 pcs). This substitute is recommended as the primary alternative when 744777112 availability is constrained.

Pulse Electronics P1167.123NLT: This part meets the core electrical requirements with 12 µH inductance and ±20% tolerance. The current rating of 1.9 A exceeds the 1.82 A requirement, and DC resistance of 57 mOhm is lower than the 58 mOhm maximum. The operating temperature range extends to 130°C, providing additional thermal margin. Physical dimensions differ slightly (7.54mm x 7.54mm vs. 7.30mm x 7.30mm), requiring verification of PCB layout compatibility. This substitute is suitable for applications where the slightly larger footprint can be accommodated and where the extended temperature range provides design benefit. The P1167.123NLT carries ROHS3 compliance and MSL 1 rating, matching the environmental qualification of the primary part.

Both substitute parts maintain shielded construction, surface mount compatibility, and compliance certifications required for equivalent functionality.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 7447779112 be used as a direct replacement for 744777112?

A: Yes. Both parts share identical electrical specifications: 12 µH inductance, ±20% tolerance, 1.82 A current rating, 58 mOhm maximum DC resistance, and -40°C to 125°C operating temperature. Both are AEC-Q200 qualified and use identical package dimensions (7.30mm x 7.30mm). The 7447779112 is a direct substitute with no design modifications required.

Q: What are the key differences between the Pulse Electronics P1167.123NLT and the Würth parts?

A: The P1167.123NLT maintains the same 12 µH inductance and ±20% tolerance. It provides higher current rating (1.9 A vs. 1.82 A), lower DC resistance (57 mOhm vs. 58 mOhm), and extended operating temperature to 130°C. The physical footprint is slightly larger at 7.54mm x 7.54mm compared to 7.30mm x 7.30mm. Self-resonant frequency is 24 MHz versus 23 MHz. These differences are within acceptable substitution parameters for most applications.

Q: Is the larger footprint of the P1167.123NLT a concern?

A: The P1167.123NLT footprint (7.54mm x 7.54mm) is 0.24mm larger in each dimension compared to the Würth parts (7.30mm x 7.30mm). Height remains identical at 4.50mm maximum. PCB layout compatibility must be verified before selection. If board space is constrained, the Würth 7447779112 is preferred.

Q: Do all three parts carry the same compliance certifications?

A: All three parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The Würth parts carry AEC-Q200 automotive qualification. The Pulse part does not list AEC-Q200 rating in the provided specifications. For automotive applications requiring AEC-Q200 certification, the Würth 744777112 or 7447779112 are required.

Q: What is the inductance tolerance impact on circuit design?

A: All three parts specify ±20% inductance tolerance. This means the actual inductance value can range from 9.6 µH to 14.4 µH. Circuit designs must account for this tolerance band in filter calculations, resonant frequency tuning, and impedance matching applications.

Q: Can the P1167.123NLT be used in applications requiring AEC-Q200 qualification?

A: No. The P1167.123NLT does not carry AEC-Q200 automotive qualification according to the provided specifications. For automotive or safety-critical applications requiring AEC-Q200 compliance, use the Würth Elektronik 744777112 or 7447779112.