470 nH Multilayer Inductor 74479773147 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74479773147 is a 470 nH unshielded multilayer inductor rated for 1.4 A continuous current with 100 mOhm DC resistance in a 0805 (2012 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

74479773147

Würth ElektronikIn Stock: 81074479773147 Datasheet

Current PartRFQ

74479775147A

Würth ElektronikIn Stock: 456974479775147A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 74479775147A is functionally equivalent to the main part 74479773147 based on the following critical parameters:

• Inductance Value: Both parts specify 470 nH with ±20% tolerance
• Current Rating: Both rated for 1.4 A continuous current
• DC Resistance: Both specify 100 mOhm
• Package: Both use 0805 (2012 Metric) surface mount package
• Operating Temperature: Both operate across -40°C to 125°C
• Compliance: Both are ROHS3 compliant

The primary difference between these parts is the shielding configuration: the main part is unshielded while the substitute is shielded. The substitute part is currently in active production status, making it the recommended replacement for the obsolete main part.

Parameter Comparison

Engineering Selection Recommendations

The 74479775147A is the manufacturer-recommended substitute for the obsolete 74479773147. Both parts maintain identical electrical specifications for inductance, current rating, and DC resistance. The substitute part is currently in active production with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Physical dimensions differ between the parts due to the shielding configuration. The substitute part is slightly larger in length, width, and height. PCB layout and component placement must accommodate the increased footprint of 0.090" L x 0.067" W (2.29mm x 1.70mm) and maximum seated height of 0.058" (1.48mm) compared to the original 0.024" (0.60mm) height.

The saturation current specification differs slightly: the main part specifies 1.2 A while the substitute specifies 1.0 A. Both values remain above the 1.4 A continuous current rating, maintaining design margin for the specified operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the 74479775147A directly replace the 74479773147 in existing designs?

A: The 74479775147A is electrically equivalent for inductance, current rating, and DC resistance. However, the substitute part has a larger physical footprint and greater height. PCB layout verification is required to confirm component placement compatibility before implementation.

Q: What is the primary difference between these two parts?

A: The main part (74479773147) is unshielded, while the substitute (74479775147A) is shielded. The shielding configuration accounts for the increased physical dimensions of the substitute part.

Q: Why is the saturation current different between the two parts?

A: The saturation current specification differs due to the different core construction and shielding approach. The main part specifies 1.2 A saturation current while the substitute specifies 1.0 A. Both values remain above the 1.4 A continuous current rating.

Q: Are both parts RoHS compliant?

A: Yes, both the 74479773147 and 74479775147A are ROHS3 compliant with unlimited moisture sensitivity (MSL 1).

Q: What packaging options are available for the substitute part?

A: The 74479775147A is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes.

Q: How do the self-resonant frequencies compare?

A: The main part specifies 150 MHz self-resonant frequency while the substitute specifies 130 MHz. Both values are suitable for the specified operating frequency range of 1 MHz test condition.