Würth Elektronik 744902010 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744902010 is a 1 nH unshielded thin film inductor designed for surface mount applications in the 0603 (1608 Metric) package. This component is rated for 800 mA maximum current with a DC resistance of 200 mOhm maximum and operates across the temperature range of -40°C to 125°C. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

744902010

Würth ElektronikIn Stock: 953744902010 Datasheet

Current PartRFQ

744901010

Würth ElektronikIn Stock: 5319744901010 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 744902010 is determined by the following critical parameters:

• Inductance Value: Must be 1 nH with tolerance of ±0.1 nH
• Inductance Type: Thin film, unshielded construction
• Series Compatibility: WE-TCI series from Würth Elektronik
• Operating Temperature Range: -40°C to 125°C minimum
• Regulatory Compliance: ROHS3 compliant, REACH unaffected

The substitute part 744901010 maintains the same inductance specification, tolerance, shielding type, temperature range, and regulatory compliance. However, it differs in package size (0402 vs 0603), current rating (700 mA vs 800 mA), and DC resistance (100 mOhm vs 200 mOhm). These differences must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The 744901010 is an active product within the same WE-TCI series and maintains full compliance with ROHS3 and REACH requirements. As the main part (744902010) is obsolete, the 744901010 provides continuity for designs requiring 1 nH inductance with ±0.1 nH tolerance in unshielded thin film construction.

Selection of the 744901010 as a substitute requires evaluation of three specific design constraints:

1. Package Size Transition: The substitute uses 0402 (1005 Metric) packaging versus the original 0603 (1608 Metric). PCB layout modifications are necessary to accommodate the smaller footprint.

2. Current Rating Reduction: The substitute is rated for 700 mA maximum current compared to the original 800 mA rating. Circuit current requirements must not exceed 700 mA.

3. DC Resistance Improvement: The substitute offers lower DC resistance (100 mOhm Max versus 200 mOhm Max), which reduces resistive losses and heat generation in the inductor.

Frequently Asked Questions (FAQ)

Q: Can the 744901010 be used as a direct replacement for the 744902010?

A: The 744901010 maintains identical inductance value, tolerance, shielding type, and operating temperature range. However, the smaller 0402 package requires PCB layout changes, and the reduced current rating (700 mA vs 800 mA) must be compatible with circuit requirements.

Q: What are the package size differences between these parts?

A: The 744902010 uses 0603 (1608 Metric) packaging with dimensions of 0.063" L x 0.031" W (1.60mm x 0.80mm). The 744901010 uses 0402 (1005 Metric) packaging with dimensions of 0.039" L x 0.020" W (1.00mm x 0.50mm). The substitute is approximately 37% smaller in length and 35% smaller in width.

Q: Does the lower DC resistance of the 744901010 affect circuit performance?

A: The 744901010 has lower DC resistance (100 mOhm Max versus 200 mOhm Max). This reduces resistive losses and is generally beneficial for circuit performance, provided the 700 mA current rating is not exceeded.

Q: Are both parts RoHS and REACH compliant?

A: Both the 744902010 and 744901010 are ROHS3 compliant and REACH unaffected. Both have Moisture Sensitivity Level (MSL) of 1 (Unlimited).

Q: What is the product status difference between these parts?

A: The 744902010 is classified as obsolete, while the 744901010 is an active product. The 744901010 is recommended for new designs and ongoing procurement.