Würth Elektronik 7447906 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7447906 is a 4.7 µH unshielded multilayer surface mount inductor designed for general-purpose filtering and energy storage applications. This component operates across a wide temperature range of -55°C to 125°C and is classified as Active product status. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1), making it suitable for standard industrial and commercial applications. Substitute parts are identified to provide alternative sourcing options when primary inventory is unavailable or when specific design requirements necessitate alternative electrical or mechanical characteristics.

Substiute Parts

7447906

Würth ElektronikIn Stock: 37367447906 Datasheet

Current PartRFQ

CV201210-4R7K

Bourns Inc.In Stock: 13001CV201210-4R7K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Würth Elektronik 7447906 are qualified based on the following critical parameters that determine functional equivalence:

Matching Parameters (Required for Substitution):

• Inductance value: 4.7 µH
• Inductance tolerance: ±10%
• DC Resistance: 1 Ohm Max
• Package type: 0805 (2012 Metric)
• Operating temperature range: -55°C to 125°C
• Quality factor: 45 @ 10 MHz
• RoHS compliance: ROHS3 Compliant

Variable Parameters (Allowed Differences):

• Current rating: The substitute part may have different current handling capability
• Shielding configuration: Unshielded or shielded variants are acceptable
• Self-resonant frequency: Minor variations are acceptable within the operating bandwidth
• Packaging format: Bulk or Tape & Reel configurations are interchangeable for component selection purposes

The Bourns CV201210-4R7K qualifies as a substitute based on matching inductance, tolerance, DCR, package dimensions, temperature range, and compliance certifications. The primary difference is the current rating (30 mA versus 440 mA) and shielding type (shielded versus unshielded), which must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

Würth Elektronik 7447906 Selection Criteria:

• Applications requiring current handling up to 440 mA
• Designs where unshielded inductor configuration is acceptable or preferred
• Circuits operating within the -55°C to 125°C temperature specification
• ROHS3 and REACH compliance requirements are met
• Active product status ensures continued availability and manufacturing support

Bourns CV201210-4R7K Selection Criteria:

• Applications with current requirements up to 30 mA maximum
• Designs benefiting from shielded inductor configuration to reduce electromagnetic interference
• Circuits operating within the -55°C to 125°C temperature specification
• ROHS3 and REACH compliance requirements are met
• Active product status ensures continued availability and manufacturing support

Critical Consideration: The Bourns CV201210-4R7K has a significantly lower current rating (30 mA) compared to the Würth Elektronik 7447906 (440 mA). This substitute is suitable only for low-current applications. The shielded design of the Bourns part may provide EMI reduction benefits in sensitive circuits but introduces different electromagnetic coupling characteristics.

Frequently Asked Questions (FAQ)

Q: Can the Bourns CV201210-4R7K be used as a direct replacement for the Würth Elektronik 7447906 in all applications?

A: No. The Bourns part has a maximum current rating of 30 mA, while the Würth part supports 440 mA. The Bourns substitute is suitable only for low-current applications. Circuit current requirements must be verified before substitution.

Q: What is the difference between shielded and unshielded inductors in these parts?

A: The Würth Elektronik 7447906 is unshielded, allowing magnetic field radiation. The Bourns CV201210-4R7K is shielded, containing the magnetic field to reduce electromagnetic interference with adjacent components. Shielding selection depends on circuit layout and EMI sensitivity requirements.

Q: Are both parts available in the same package format?

A: Yes. Both parts use the 0805 (2012 Metric) surface mount package with identical physical dimensions: 2.00mm length × 1.25mm width × 1.45mm maximum height. They are mechanically interchangeable on PCB layouts.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the Würth Elektronik 7447906 and Bourns CV201210-4R7K are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. They meet equivalent regulatory requirements for industrial and commercial applications.

Q: What is the significance of the self-resonant frequency difference?

A: The Würth part has a self-resonant frequency of 41 MHz, while the Bourns part is 35 MHz. This difference affects high-frequency performance. For applications operating near or above these frequencies, the specific self-resonant frequency must be evaluated against circuit bandwidth requirements.

Q: Can packaging format (Bulk versus Tape & Reel) affect substitution decisions?

A: Packaging format affects procurement and assembly processes but does not impact electrical or mechanical compatibility. The Würth part is supplied in Bulk packaging, while the Bourns part is supplied in Tape & Reel format. Both formats contain identical components suitable for component selection purposes.