Equivalent & Substitute Parts for Würth Elektronik 74479974133

Part Overview

The Würth Elektronik 74479974133 is a 330 nH shielded multilayer inductor rated for 2 A continuous current with a maximum DC resistance of 69 mOhm. This component is designed for surface mount applications in the 0805 (2012 Metric) package format. The part is currently listed as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement planning.

Substiute Parts

74479974133

Würth ElektronikIn Stock: 116274479974133 Datasheet

Current PartRFQ

74479275147

Würth ElektronikIn Stock: 113374479275147 Datasheet

MFR RecommendedRFQ

74479276124

Würth ElektronikIn Stock: 628774479276124 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the 74479974133 are identified based on the following critical parameters that determine functional compatibility:

• Shielding Type: All substitutes maintain shielded construction to preserve electromagnetic isolation characteristics
• Mounting Type: All substitutes are surface mount components compatible with automated assembly processes
• Operating Temperature Range: All substitutes support the -40°C ~ 125°C operating window
• RoHS & Compliance: All substitutes maintain ROHS3 compliance and REACH unaffected status
• Moisture Sensitivity: All substitutes maintain MSL 1 rating for unlimited shelf life

The substitute parts listed below are manufacturer-recommended alternatives from Würth Elektronik. While inductance values and current ratings differ from the original part, these components are qualified as functional substitutes within the WE-PMCI series for applications requiring shielded surface mount inductors in compact form factors.

Parameter Comparison

Engineering Selection Recommendations

74479275147 is an active product from Würth Elektronik's WE-PMCI molded inductor series. This substitute maintains the 0805 (2012 Metric) package footprint, enabling direct PCB layout compatibility with the original 74479974133. The inductance value of 470 nH represents a 42% increase from the original 330 nH specification. The current rating of 2.6 A exceeds the original 2 A rating, and the DC resistance of 47 mOhm is lower than the original 69 mOhm maximum. This component is suitable for applications where the higher inductance value and improved current handling are acceptable within circuit design parameters.

74479276124 is an active product from Würth Elektronik's WE-PMCI molded inductor series. This substitute uses the 0806 (2016 Metric) package, which is slightly larger in width (1.60mm vs. 1.25mm) and height (1.00mm vs. 0.60mm) compared to the original part. The inductance value of 240 nH represents a 27% decrease from the original 330 nH specification. The current rating of 3.6 A significantly exceeds the original 2 A rating, and the DC resistance of 23 mOhm is substantially lower than the original 69 mOhm maximum. This component is suitable for applications where the lower inductance value, higher current capacity, and reduced DC resistance are compatible with circuit requirements, provided PCB layout accommodates the larger package dimensions.

Both substitute parts maintain ROHS3 compliance, MSL 1 rating, and the -40°C ~ 125°C operating temperature range of the original component.

Frequently Asked Questions (FAQ)

Q: Can 74479275147 be used as a direct replacement for 74479974133?

A: The 74479275147 maintains the same 0805 (2012 Metric) package footprint and surface mount configuration, allowing direct PCB placement compatibility. However, the inductance value differs (470 nH vs. 330 nH). Circuit performance depends on whether the application can tolerate this inductance change. The improved current rating (2.6 A vs. 2 A) and lower DC resistance (47 mOhm vs. 69 mOhm) may provide operational benefits in current-limited applications.

Q: What are the package differences between the substitute parts?

A: The 74479275147 uses the 0805 (2012 Metric) package with dimensions of 2.00mm L x 1.25mm W x 0.60mm H (seated). The 74479276124 uses the 0806 (2016 Metric) package with dimensions of 2.00mm L x 1.60mm W x 1.00mm H (seated). The 0806 package is wider and taller, requiring verification of available PCB space before selection.

Q: Are both substitute parts currently available?

A: Yes. The 74479275147 is listed as active product status with 1069 pieces in stock. The 74479276124 is listed as active product status with 6248 pieces in stock. The original 74479974133 is obsolete.

Q: Do the substitute parts maintain the same compliance certifications?

A: Yes. Both substitute parts are ROHS3 compliant, REACH unaffected, and maintain MSL 1 (unlimited) moisture sensitivity rating, matching the original component's compliance profile.

Q: How do the DC resistance values compare?

A: The original 74479974133 has a maximum DC resistance of 69 mOhm. The 74479275147 has a maximum DC resistance of 47 mOhm (32% lower). The 74479276124 has a maximum DC resistance of 23 mOhm (67% lower). Lower DC resistance reduces resistive losses in the inductor.

Q: What is the significance of the self-resonant frequency differences?

A: The original 74479974133 has a self-resonant frequency of 25 MHz. The 74479275147 has a self-resonant frequency of 140 MHz. The 74479276124 has a self-resonant frequency of 180 MHz. Higher self-resonant frequencies indicate the component maintains inductive behavior across a wider frequency range before transitioning to capacitive behavior.