Würth Elektronik 744902018 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744902018 is a 1.8 nH unshielded thin film inductor rated for 300 mA with a maximum DC resistance of 200mOhm, packaged in 0603 (1608 Metric) surface mount format. This component is classified as obsolete, necessitating identification of equivalent alternatives for ongoing design requirements and procurement needs. Substitute parts must maintain electrical performance within the specified inductance, current rating, and impedance parameters while accommodating available packaging options.

Substiute Parts

744902018

Würth ElektronikIn Stock: 1119744902018 Datasheet

Current PartRFQ

744901018

Würth ElektronikIn Stock: 3862744901018 Datasheet

DirectRFQ

L06031R8CGSTR

KYOCERA AVXIn Stock: 1372L06031R8CGSTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744902018 is determined by the following critical parameters:

• Inductance Value: Must be 1.8 nH to maintain circuit performance
• Inductance Tolerance: ±0.1nH or tighter tolerance acceptable
• Current Rating: Must equal or exceed 300 mA minimum
• DC Resistance: Must not exceed 200mOhm maximum
• Shielding Configuration: Unshielded only
• Type: Thin film construction required
• Operating Temperature Range: Must support -40°C ~ 125°C minimum
• RoHS Compliance: ROHS3 Compliant required
• Moisture Sensitivity: MSL 1 acceptable

Two substitute parts meet these criteria with variations in package size and current handling capability.

Parameter Comparison

Engineering Selection Recommendations

744901018 (Würth Elektronik): This substitute maintains identical inductance, tolerance, and DC resistance specifications while providing increased current handling capacity at 560 mA. The component is active in production with ROHS3 compliance and MSL 1 rating. Package transition from 0603 to 0402 (1005 Metric) requires PCB layout modification due to reduced footprint dimensions (1.00mm x 0.50mm versus 1.60mm x 0.80mm). This option is suitable for space-constrained applications where the smaller package is advantageous.

L06031R8CGSTR (KYOCERA AVX Accu-L®): This substitute maintains the original 0603 (1608 Metric) package format, eliminating PCB redesign requirements. The component offers superior current rating at 1 A and reduced DC resistance at 70mOhm maximum, providing improved thermal performance. Inductance tolerance is ±0.2nH, which remains within acceptable circuit design margins. Extended operating temperature range to -55°C provides additional environmental coverage. The component is active in production with ROHS3 compliance and MSL 1 rating. This option is recommended for direct replacement without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the 744901018 be used as a direct replacement without PCB modification?

A: No. The 744901018 uses 0402 (1005 Metric) packaging versus the original 0603 (1608 Metric) format. PCB footprint redesign is required. The L06031R8CGSTR maintains the original package size and supports direct substitution.

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

A: The main part and 744901018 specify ±0.1nH tolerance, while L06031R8CGSTR specifies ±0.2nH. Both tolerances are acceptable for 1.8 nH inductors in typical RF and high-frequency applications. Selection depends on circuit-specific tolerance requirements.

Q: Does the reduced DC resistance of L06031R8CGSTR provide measurable benefits?

A: Yes. The L06031R8CGSTR DCR of 70mOhm maximum versus 200mOhm maximum reduces resistive losses by approximately 65%. This results in lower heat dissipation and improved Q factor, beneficial in high-frequency and power-sensitive applications.

Q: Are both substitutes compatible with the original operating temperature range?

A: Yes. Both substitutes support the original -40°C ~ 125°C range. The L06031R8CGSTR extends this to -55°C, providing additional low-temperature capability.

Q: What are the compliance and availability considerations?

A: Both substitutes are ROHS3 compliant with MSL 1 rating, matching the original part. Both are active in production with documented inventory availability, ensuring long-term procurement viability.