Würth Elektronik 744902122 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744902122 is a 22 nH unshielded thin film inductor rated for 250 mA with a maximum DC resistance of 2 Ohm, packaged in 0603 (1608 Metric) surface mount format. This component is classified as obsolete, necessitating identification of suitable substitute parts for ongoing design requirements and procurement needs. The WE-TCI series thin film inductors are designed for high-frequency applications requiring low inductance values with controlled impedance characteristics.

Substiute Parts

744902122

Würth ElektronikIn Stock: 937744902122 Datasheet

Current PartRFQ

744901122

Würth ElektronikIn Stock: 9452744901122 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 744902122 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Inductance value: 22 nH (±2% tolerance maintained)
• Shielding type: Unshielded
• Operating temperature range: -40°C ~ 125°C minimum
• Series classification: WE-TCI thin film inductor family

Mechanical Compatibility Criteria:

• Surface mount mounting type
• Package format compatibility with PCB layout constraints

Functional Substitution Parameters:

• Current rating must meet or exceed application requirements
• DC resistance must be acceptable for circuit performance
• Self-resonant frequency must support intended operating frequency

The substitute part 744901122 shares the same inductance value, tolerance, shielding type, temperature range, and series designation. However, it differs in package size (0402 vs. 0603), current rating (90 mA vs. 250 mA), and DC resistance (2.6 Ohm vs. 2 Ohm). These differences establish it as a functional equivalent only under specific application constraints.

Parameter Comparison

Engineering Selection Recommendations

The 744901122 serves as an active substitute for the obsolete 744902122 within defined application constraints. Both components maintain ROHS3 compliance and identical moisture sensitivity ratings, ensuring regulatory and environmental compatibility.

Selection of the 744901122 requires verification that the application current demand does not exceed 90 mA, as this represents a 64% reduction from the original 250 mA rating. The increased DC resistance of 2.6 Ohm versus 2 Ohm maximum introduces additional power dissipation that must be evaluated for thermal performance.

The package size reduction from 0603 to 0402 format necessitates PCB layout compatibility assessment. The smaller footprint may provide space optimization benefits but requires confirmation that component placement and routing constraints are satisfied.

Frequently Asked Questions (FAQ)

Q: Can the 744901122 directly replace the 744902122 in all applications?

A: Direct replacement is limited to applications where the circuit current demand does not exceed 90 mA. The 744902122 supports up to 250 mA, while the 744901122 is rated for 90 mA maximum. Current exceeding this