Würth Elektronik 744045210 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744045210 is a 100 µH unshielded drum core wirewound inductor rated for 270 mA continuous current with a maximum DC resistance of 2.5Ohm. This surface mount component is designed for applications requiring fixed inductance in the 100 µH range with moderate current handling capability. The part is actively manufactured and ROHS3 compliant, making it suitable for modern electronic assemblies. Substitute parts are identified when equivalent inductance values, current ratings, and core materials are available from alternative manufacturers, providing procurement flexibility and supply chain redundancy.

Substiute Parts

744045210

Würth ElektronikIn Stock: 3498744045210 Datasheet

Current PartRFQ

SDR0403-101KL

Bourns Inc.In Stock: 3429SDR0403-101KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Würth Elektronik 744045210 are qualified based on the following electrical and mechanical parameters:

• Inductance Value: 100 µH nominal with ±10% tolerance
• Core Type: Ferrite drum core, wirewound construction
• Shielding Configuration: Unshielded
• Current Rating: Minimum 270 mA continuous current capability
• DC Resistance: Maximum 2.5Ohm to ensure thermal and performance compatibility
• Operating Temperature: -40°C to 125°C range
• Compliance: ROHS3 compliant, MSL 1 rating
• Mounting: Surface mount technology

The Bourns SDR0403-101KL meets these substitution criteria with equivalent inductance, superior current rating (350 mA), and lower DC resistance (1.9Ohm), providing enhanced performance characteristics within the same functional category.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744045210 and Bourns SDR0403-101KL are actively manufactured components with ROHS3 compliance and MSL 1 ratings, ensuring regulatory compliance and moisture handling compatibility for standard assembly processes. The Bourns SDR0403-101KL provides superior electrical performance with 350 mA current rating versus 270 mA and reduced DC resistance of 1.9Ohm compared to 2.5Ohm maximum, resulting in lower thermal dissipation. Selection between these parts should be based on circuit current requirements, thermal budget constraints, and mechanical fit within the application's PCB layout. Both components maintain identical inductance values and operating temperature ranges, supporting direct functional substitution in applications designed for the primary part.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR0403-101KL directly replace the Würth Elektronik 744045210?

A: Yes, the Bourns SDR0403-101KL is a direct functional substitute. Both components provide 100 µH inductance with ±10% tolerance, unshielded ferrite drum core construction, and identical operating temperature ranges. The Bourns part offers enhanced current handling (350 mA vs. 270 mA) and lower DC resistance (1.9Ohm vs. 2.5Ohm maximum).

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by inductance value (100 µH), inductance tolerance (±10%), core material (ferrite), shielding type (unshielded), minimum current rating (≥270 mA), maximum DC resistance (≤2.5Ohm), and operating temperature range (-40°C to 125°C).

Q: Are there mechanical package differences between these parts?

A: The Würth Elektronik 744045210 uses the 1812 (4532 Metric) package with dimensions 4.50mm L × 3.20mm W × 2.90mm H (seated). The Bourns SDR0403-101KL uses a nonstandard package with dimensions 4.50mm L × 4.00mm W × 3.50mm H (seated). PCB layout verification is required to confirm mechanical fit.

Q: Do both parts meet current industry compliance standards?

A: Yes, both components are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, meeting current regulatory requirements for commercial and industrial applications.

Q: What is the significance of the lower DC resistance in the Bourns part?

A: Lower DC resistance (1.9Ohm vs. 2.5Ohm) reduces resistive losses and thermal dissipation during operation. This characteristic is beneficial in applications with sustained current flow or thermal constraints, while maintaining equivalent inductance performance.