S3483-4R7M Equivalent & Substitute Parts

Part Overview

The S3483-4R7M is a 4.7 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.96 A with a maximum DC resistance of 43 mOhm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The part operates across a temperature range of -20°C to 80°C and is mounted as a surface mount component in a nonstandard package measuring 7.30mm × 7.30mm × 3.20mm (max height). Current inventory shows 715 pieces available as new original stock.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Inductance Tolerance	±20%
Current Rating	1.96 A
DC Resistance (Max)	43 mOhm
Core Material	Ferrite
Shielding	Shielded
Mounting Type	Surface Mount
Package Dimensions	7.30mm × 7.30mm × 3.20mm (max)
Operating Temperature	-20°C to 80°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the S3483-4R7M are qualified based on the following electrical and mechanical parameters:

Inductance Value: Must be 4.7 µH with ±20% tolerance
Core Type: Ferrite material with shielded drum core configuration
Shielding: Shielded construction required
Mounting: Surface mount technology
Package Footprint: 7.30mm × 7.30mm base dimensions (allows minor height variation)
Current Rating: Minimum 1.96 A (higher ratings acceptable for increased design margin)
DC Resistance: Maximum 43 mOhm (lower values acceptable)

Two substitute parts meet these criteria and are available as active products with improved specifications and compliance status.

Parameter Comparison

Parameter	S3483-4R7M (Main)	7447789004 (Würth)	SRR0604-4R7ML (Bourns)
Manufacturer	API Delevan Inc.	Würth Elektronik	Bourns Inc.
Inductance	4.7 µH	4.7 µH	4.7 µH
Inductance Tolerance	±20%	±20%	±20%
Current Rating (Amps)	1.96 A	2.9 A	2.0 A
DC Resistance (Max)	43 mOhm	35 mOhm	60 mOhm
Core Material	Ferrite	Ferrite	Ferrite
Shielding	Shielded	Shielded	Shielded
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package Dimensions	7.30mm × 7.30mm	7.30mm × 7.30mm	6.50mm × 6.50mm
Height (Max)	3.20mm	4.60mm	4.80mm
Operating Temperature	-20°C to 80°C	-40°C to 125°C	-40°C to 125°C
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

7447789004 (Würth Elektronik WE-PD Robust Series)

This substitute provides the closest electrical performance match with improved specifications. The current rating of 2.9 A exceeds the 1.96 A requirement, and the DC resistance of 35 mOhm is lower than the 43 mOhm maximum. The part is active in production, ROHS3 compliant, and rated to AEC-Q200 automotive standards. Operating temperature range extends to -40°C to 125°C, providing broader environmental coverage. Package footprint matches at 7.30mm × 7.30mm with a maximum height of 4.60mm, representing a 0.30mm increase from the original part.

SRR0604-4R7ML (Bourns SRR0604 Series)

This substitute meets all electrical requirements with a 2.0 A current rating and 60 mOhm maximum DC resistance. The part is active in production and ROHS3 compliant with an extended operating temperature range of -40°C to 125°C. The package footprint is smaller at 6.50mm × 6.50mm, which may require PCB layout verification. Maximum height of 4.80mm represents a 1.60mm increase from the original part and should be evaluated for clearance constraints. This option provides the lowest current rating among substitutes while maintaining margin above the 1.96 A requirement.

Frequently Asked Questions (FAQ)

Q: Can the 7447789004 be used as a direct replacement for the S3483-4R7M?

A: Yes. Both parts share identical inductance values (4.7 µH), tolerance (±20%), core material (ferrite), shielding, and mounting type. The 7447789004 has superior electrical specifications with higher current rating (2.9 A vs. 1.96 A) and lower DC resistance (35 mOhm vs. 43 mOhm). Package footprint is identical at 7.30mm × 7.30mm. Height increases by 0.30mm (4.60mm vs. 3.20mm), which should be verified against PCB clearance requirements.

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

A: The 7447789004 offers higher current capacity (2.9 A) and lower DC resistance (35 mOhm), making it suitable for applications requiring greater thermal margin. The SRR0604-4R7ML has a smaller footprint (6.50mm × 6.50mm) but greater height (4.80mm) and slightly higher DC resistance (60 mOhm). Both are active products with ROHS3 compliance and extended temperature ranges.

Q: Is the smaller footprint of the SRR0604-4R7ML compatible with the original PCB design?

A: The SRR0604-4R7ML footprint of 6.50mm × 6.50mm is smaller than the original 7.30mm × 7.30mm. PCB layout verification is required to confirm pad compatibility and clearance. The increased height of 4.80mm must also be evaluated against component placement constraints.

Q: Are both substitute parts compliant with current regulatory standards?

A: Yes. Both the 7447789004 and SRR0604-4R7ML are ROHS3 compliant and REACH unaffected. The 7447789004 carries AEC-Q200 automotive qualification. The original S3483-4R7M is RoHS non-compliant, making substitution necessary for new designs requiring regulatory compliance.

Q: What is the impact of DC resistance differences on circuit performance?

A: The S3483-4R7M specifies 43 mOhm maximum DC resistance. The 7447789004 at 35 mOhm provides lower losses and reduced heat generation. The SRR0604-4R7ML at 60 mOhm represents a 17 mOhm increase, which may impact efficiency in current-sensitive applications. Circuit simulation or testing is appropriate to validate performance impact for specific applications.

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