Würth Elektronik 7447789004 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7447789004 is a 4.7 µH shielded drum core wirewound inductor rated for 2.9 A continuous current with a maximum DC resistance of 35 mOhm. This surface mount component is designed for applications requiring stable inductance performance across a wide operating temperature range of -40°C to 125°C. The part is AEC-Q200 rated and ROHS3 compliant, making it suitable for automotive and industrial applications. Substitute parts are identified when equivalent electrical and mechanical parameters are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity.

Substiute Parts

7447789004

Würth ElektronikIn Stock: 129737447789004 Datasheet

Current PartRFQ

SRR7032-4R7M

Bourns Inc.In Stock: 3070SRR7032-4R7M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Würth Elektronik 7447789004 are qualified based on the following critical parameters:

• Inductance Value: 4.7 µH with ±20% tolerance
• Current Rating: Minimum 2.9 A continuous current capability
• DC Resistance: Maximum 35 mOhm to ensure thermal performance equivalence
• Core Type: Ferrite drum core, wirewound construction
• Shielding: Shielded configuration for EMI containment
• Operating Temperature Range: -40°C to 125°C
• Mounting: Surface mount technology
• Package Footprint: Nonstandard 7.30 mm × 7.30 mm form factor

The Bourns Inc. SRR7032-4R7M meets the inductance, core material, shielding, temperature range, and mounting requirements. However, the current rating of 2.0 A and saturation current of 2.0 A are below the main part specification, and the DC resistance of 42 mOhm exceeds the 35 mOhm maximum. These differences must be evaluated against application requirements.

Parameter Comparison

Engineering Selection Recommendations

The Bourns SRR7032-4R7M shares the same inductance value, tolerance, core material, shielding approach, and operating temperature range as the Würth Elektronik 7447789004. Both components are ROHS3 compliant with MSL 1 rating and active product status.

Selection between these parts depends on application current requirements. The Würth part supports 2.9 A continuous current with 3.9 A saturation, while the Bourns part is rated for 2.0 A continuous with 2.0 A saturation. The Bourns part also exhibits higher DC resistance at 42 mOhm compared to the 35 mOhm maximum of the Würth part, resulting in increased power dissipation. The Würth part operates at a higher self-resonant frequency of 61 MHz versus 43 MHz for the Bourns part.

Component selection must align with the specific current demands and thermal constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SRR7032-4R7M directly replace the Würth Elektronik 7447789004?

A: Direct replacement is possible only if the application current requirement does not exceed 2.0 A continuous. The Würth part is rated for 2.9 A, providing higher current capacity. The increased DC resistance of the Bourns part (42 mOhm vs. 35 mOhm) will result in higher power dissipation and must be evaluated against thermal design margins.

Q: What are the key differences between these inductors?

A: The primary differences are current rating (2.9 A vs. 2.0 A), saturation current (3.9 A vs. 2.0 A), DC resistance (35 mOhm vs. 42 mOhm), self-resonant frequency (61 MHz vs. 43 MHz), and physical dimensions (7.30 mm vs. 7.00 mm). Both share identical inductance, tolerance, core material, shielding, temperature range, and compliance ratings.

Q: Are the physical dimensions compatible?

A: The Bourns part is slightly smaller (7.00 mm × 7.00 mm × 3.40 mm) compared to the Würth part (7.30 mm × 7.30 mm × 4.60 mm). PCB layout verification is required to confirm fit within the allocated footprint space.

Q: Do both parts meet automotive qualification standards?

A: The Würth Elektronik 7447789004 carries AEC-Q200 rating. The Bourns SRR7032-4R7M does not list AEC-Q200 certification in the provided specifications. Automotive applications requiring AEC-Q200 compliance must use the Würth part.

Q: How do the self-resonant frequencies compare?

A: The Würth part operates at 61 MHz self-resonant frequency, while the Bourns part operates at 43 MHz. Higher self-resonant frequency provides better high-frequency performance and wider usable bandwidth. Application frequency response requirements should guide selection.