Würth Elektronik 744775112 Fixed Inductor - Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744775112 is a 12 µH unshielded drum core wirewound inductor rated for 2.18 A continuous current with a maximum DC resistance of 80 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is part of the WE-PD2 series. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductor category.

Substiute Parts

744775112

Würth ElektronikIn Stock: 1419744775112 Datasheet

Current PartRFQ

SDR0805-120ML

Bourns Inc.In Stock: 1225SDR0805-120ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744775112 is determined by the following critical parameters:

• Inductance value of 12 µH within acceptable tolerance range
• Current rating sufficient to support minimum 2.18 A operation
• DC resistance not exceeding 80 mOhm maximum
• Ferrite drum core construction with unshielded configuration
• Surface mount package with compatible footprint dimensions
• Operating temperature range covering -40°C to 125°C
• ROHS3 compliance and equivalent regulatory status

The Bourns SDR0805-120ML meets these substitution criteria with equivalent inductance, matching DC resistance specification, and compatible thermal and compliance ratings.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744775112 and Bourns SDR0805-120ML are active production components with ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on application-specific current requirements and tolerance specifications. The 744775112 provides a higher current rating of 2.18 A with tighter inductance tolerance of ±10%, making it suitable for applications requiring maximum current headroom. The SDR0805-120ML operates at 2.0 A with ±20% tolerance and represents an alternative when the lower current rating and broader tolerance are acceptable within circuit design margins. Both components maintain identical DC resistance and thermal operating range specifications, ensuring equivalent thermal performance in the application.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR0805-120ML be used as a direct replacement for the Würth 744775112?

A: The SDR0805-120ML is electrically compatible for applications where the 2.0 A current rating is sufficient. The primary design consideration is the current rating difference of 0.18 A and the inductance tolerance difference of ±10% versus ±20%. Verify that your circuit design accommodates these parameter variations.

Q: What are the physical dimension differences between these inductors?

A: The Würth 744775112 measures 7.80mm L × 7.00mm W × 5.50mm H (seated). The Bourns SDR0805-120ML measures 7.80mm L × 7.80mm W × 5.30mm H (seated). The width dimension differs by 0.80mm, requiring verification of PCB layout compatibility.

Q: Are both parts suitable for the same operating temperature range?

A: Yes, both components operate across -40°C to 125°C, providing equivalent thermal performance for industrial applications.

Q: What is the significance of the inductance tolerance difference?

A: The Würth part specifies ±10% tolerance while the Bourns part specifies ±20%. Applications requiring tighter inductance control should use the 744775112. Applications with broader tolerance margins can accommodate the SDR0805-120ML.

Q: Do both parts have identical compliance certifications?

A: Yes, both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS code 8504.50.4000.