Würth Elektronik 74479974147 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74479974147 is a 470 nH shielded multilayer inductor rated for 1.8 A with a maximum DC resistance of 86 mOhm, packaged in 0805 (2012 Metric) surface mount format. This component is classified as obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Key Parameters

Parameter	Value
Inductance	470 nH
Tolerance	±20%
Current Rating	1.8 A
DC Resistance (DCR)	86 mOhm Max
Shielding	Shielded
Operating Temperature	-40°C to 125°C
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 74479974147 are qualified based on the following electrical and mechanical parameters:

Inductance value: 470 nH (exact match required)
Inductance tolerance: ±20% (matching tolerance specification)
Shielding type: Shielded (electromagnetic containment requirement)
Operating temperature range: -40°C to 125°C (thermal compatibility)
Surface mount technology: 0805 or compatible package footprints
RoHS3 compliance: Environmental and regulatory alignment
Current rating: Equal to or greater than 1.8 A (performance headroom acceptable)
DC resistance: Lower or equal to 86 mOhm (improved performance acceptable)

The substitute parts listed below meet these criteria while offering improved electrical characteristics, including higher current saturation ratings and reduced DC resistance.

Parameter Comparison

Parameter	74479974147 (Main)	74479275147 (Substitute)	74479276147C (Substitute)
Manufacturer	Würth Elektronik	Würth Elektronik	Würth Elektronik
Series	WE-PMMI	WE-PMCI	WE-PMCI
Type	Multilayer	Molded	Molded
Inductance	470 nH	470 nH	470 nH
Tolerance	±20%	±20%	±20%
Current Rating (Amps)	1.8 A	2.6 A	2.7 A
Current - Saturation (Isat)	2.6 A	3.3 A	4.5 A
DC Resistance (DCR)	86 mOhm Max	47 mOhm Max	42 mOhm Max
Shielding	Shielded	Shielded	Shielded
Frequency - Self Resonant	23 MHz	140 MHz	100 MHz
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package / Case	0805 (2012 Metric)	0805 (2012 Metric)	0806 (2016 Metric)
Size / Dimension	0.079" L x 0.049" W (2.00mm x 1.25mm)	0.079" L x 0.049" W (2.00mm x 1.25mm)	0.079" L x 0.063" W (2.00mm x 1.60mm)
Height - Seated (Max)	0.024" (0.60mm)	0.039" (1.00mm)	0.039" (1.00mm)
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both substitute parts 74479275147 and 74479276147C are active products from Würth Elektronik and maintain full ROHS3 compliance and MSL 1 rating, ensuring regulatory and environmental alignment with the obsolete 74479974147.

The 74479275147 maintains identical 0805 (2012 Metric) package dimensions and footprint compatibility with the main part. This substitute provides improved electrical performance with 2.6 A current rating, 47 mOhm maximum DC resistance, and 140 MHz self-resonant frequency.

The 74479276147C uses a 0806 (2016 Metric) package, which is physically larger in width (1.60mm versus 1.25mm). This substitute offers the highest current rating at 2.7 A, lowest DC resistance at 42 mOhm maximum, and 4.5 A saturation current. PCB layout modifications are required for this option due to package size differences.

Frequently Asked Questions (FAQ)

Q: Can 74479275147 be used as a direct replacement for 74479974147?

A: Yes. The 74479275147 maintains identical inductance (470 nH), tolerance (±20%), shielding, operating temperature range, and 0805 package footprint. It provides improved current handling and reduced DC resistance while maintaining full compatibility with existing PCB layouts.

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

A: The 74479275147 uses 0805 (2012 Metric) packaging identical to the main part. The 74479276147C uses 0806 (2016 Metric) packaging, which is 0.35mm wider. PCB footprint modifications are necessary for 74479276147C implementation.

Q: Why do the substitute parts have lower DC resistance values?

A: The substitute parts use molded construction (WE-PMCI series) compared to the multilayer construction (WE-PMMI series) of the main part. This construction difference results in improved electrical characteristics, including reduced DC resistance and higher current saturation ratings.

Q: Are all parts RoHS3 compliant?

A: Yes. The main part 74479974147 and both substitute parts 74479275147 and 74479276147C are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Which substitute should be selected for space-constrained applications?

A: The 74479275147 is recommended for space-constrained designs, as it maintains the original 0805 package dimensions while providing superior electrical performance. The 74479276147C requires additional PCB space due to its larger 0806 package footprint.

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