Würth Elektronik 74479157 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74479157 is a 2.7 µH unshielded multilayer inductor designed for surface mount applications in the 1206 (3216 Metric) package. This component is rated for 50 mA maximum current with a DC resistance of 600mOhm maximum and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

74479157

Würth ElektronikIn Stock: 87274479157 Datasheet

Current PartRFQ

74479152

Würth ElektronikIn Stock: 118274479152 Datasheet

MFR RecommendedRFQ

74479153

Würth ElektronikIn Stock: 221774479153 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74479157 are identified based on the following critical parameters that determine functional compatibility:

• Package / Case: All substitutes must use the 1206 (3216 Metric) surface mount package to ensure PCB footprint compatibility
• Series: All substitutes are from the Würth Elektronik WE-MI series, maintaining design consistency
• Operating Temperature Range: All substitutes maintain the -55°C to 125°C operating range
• Mounting Type: All substitutes are surface mount components
• RoHS Compliance: All substitutes maintain ROHS3 compliance status

The substitute parts identified are 74479152 and 74479153. These parts differ in inductance value and current rating specifications, which may be acceptable depending on circuit requirements and design margins.

Parameter Comparison

Engineering Selection Recommendations

74479152 (2.2 µH, 550 mA): This part is manufacturer-recommended and carries active product status. The inductance value is lower than the main part (2.2 µH versus 2.7 µH), representing an 18.5% reduction. The current rating is significantly higher at 550 mA compared to 50 mA. DC resistance remains at 600mOhm maximum. Selection of this part requires circuit analysis to confirm that the lower inductance value remains within acceptable design tolerances.

74479153 (3.3 µH, 50 mA): This part is manufacturer-recommended and carries active product status. The inductance value is higher than the main part (3.3 µH versus 2.7 µH), representing a 22.2% increase. The current rating matches the main part at 50 mA. DC resistance is slightly higher at 700mOhm maximum. Selection of this part requires circuit analysis to confirm that the higher inductance value remains within acceptable design tolerances.

Both substitute parts maintain full compliance with RoHS3 requirements and operate across the identical temperature range. Both are available in active production status, ensuring long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can 74479152 be used as a direct replacement for 74479157?

A: The 74479152 shares the same package, series, operating temperature range, and RoHS compliance. However, the inductance value differs (2.2 µH versus 2.7 µH). Direct substitution is possible only if circuit design tolerances accommodate an 18.5% reduction in inductance. The significantly higher current rating (550 mA versus 50 mA) provides additional design margin for current handling.

Q: Can 74479153 be used as a direct replacement for 74479157?

A: The 74479153 shares the same package, series, operating temperature range, current rating, and RoHS compliance. However, the inductance value differs (3.3 µH versus 2.7 µH), representing a 22.2% increase. Direct substitution is possible only if circuit design tolerances accommodate this inductance increase. DC resistance is marginally higher at 700mOhm maximum.

Q: Why is the main part 74479157 obsolete?

A: The 74479157 is classified as obsolete by the manufacturer. Both identified substitute parts (74479152 and 74479153) carry active product status, ensuring continued availability and manufacturing support.

Q: Are all substitute parts in the same package?

A: Yes. The main part and all substitute parts use the 1206 (3216 Metric) surface mount package with identical physical dimensions (0.126" L x 0.063" W, 3.20mm x 1.60mm) and maximum seated height (0.051", 1.30mm). PCB footprints are compatible.

Q: What are the key differences between the two substitute parts?

A: 74479152 offers lower inductance (2.2 µH) with significantly higher current capacity (550 mA). 74479153 offers higher inductance (3.3 µH) with current capacity matching the original part (50 mA). Selection depends on specific circuit requirements for inductance value and current handling capability.