Würth Elektronik 74479068 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74479068 is a 6.8 µH unshielded multilayer inductor designed for surface mount applications in the 0805 (2012 Metric) package. This component operates at 15 mA maximum current with 1 Ohm maximum DC resistance and is rated for operating temperatures from -55°C to 125°C. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, supply chain considerations, or specific application requirements for shielded versus unshielded configurations.

Substiute Parts

74479068

Würth ElektronikIn Stock: 378674479068 Datasheet

Current PartRFQ

CV201210-6R8K

Bourns Inc.In Stock: 33306CV201210-6R8K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Würth Elektronik 74479068 are qualified based on the following critical parameters that determine functional equivalence:

Electrical Parameters (Must Match):

• Inductance value: 6.8 µH
• Inductance tolerance: ±10%
• Current rating: 15 mA minimum
• DC resistance: 1 Ohm maximum
• Self-resonant frequency: 29 MHz
• Operating temperature range: -55°C to 125°C minimum

Mechanical Parameters (Must Match):

• Package type: 0805 (2012 Metric)
• Mounting type: Surface Mount
• Physical dimensions: 2.00mm L x 1.25mm W x 1.45mm H (seated max)

Compliance Parameters (Must Match):

• RoHS3 compliance
• MSL rating: 1 (Unlimited)

The primary distinction between the main part and substitute is the shielding configuration. The Würth Elektronik 74479068 is unshielded, while the Bourns CV201210-6R8K is shielded. Both configurations meet all electrical and mechanical requirements for direct substitution in applications where the shielding characteristic does not impose design constraints.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 74479068 and Bourns CV201210-6R8K meet the core electrical and mechanical requirements for 6.8 µH multilayer inductor applications in 0805 surface mount packages. Selection between these parts is determined by application-specific requirements:

Würth Elektronik 74479068 (Unshielded):

• Suitable for applications where electromagnetic shielding is not required
• Lower cost profile typical of unshielded configurations
• Appropriate for general-purpose RF and power supply filtering circuits
• Current inventory: 3,766 pieces

Bourns CV201210-6R8K (Shielded):

• Required for applications with strict EMI/RFI isolation requirements
• Provides electromagnetic containment in densely populated PCB layouts
• Suitable for sensitive analog and mixed-signal circuits
• Higher inventory availability: 33,200 pieces
• Supplied in Tape & Reel packaging format

Both parts maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and identical operating temperature specifications (-55°C to 125°C). The Q factor difference at 4 MHz (50 versus 45) is within acceptable engineering tolerance for most applications. Selection should be based on PCB layout constraints, EMI requirements, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the Bourns CV201210-6R8K directly replace the Würth Elektronik 74479068 in my circuit?

A: Yes, the Bourns CV201210-6R8K is electrically and mechanically equivalent. Both parts have identical inductance (6.8 µH), current rating (15 mA), DC resistance (1 Ohm max), and package dimensions (0805 / 2012 Metric). The primary difference is shielding: the Bourns part is shielded while the Würth part is unshielded. Verify that your application does not require a specific shielding configuration before substitution.

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

A: Shielded inductors (Bourns CV201210-6R8K) contain electromagnetic fields within the component, reducing radiated EMI and susceptibility to external magnetic fields. Unshielded inductors (Würth Elektronik 74479068) allow magnetic fields to extend into surrounding space. Shielded inductors are preferred in noise-sensitive applications and high-density PCB layouts. Unshielded inductors typically offer lower cost and smaller effective footprint in non-critical applications.

Q: Are both parts RoHS compliant?

A: Yes, both the Würth Elektronik 74479068 and Bourns CV201210-6R8K are ROHS3 compliant and REACH unaffected. Both carry EAR99 export classification and are rated under HTSUS code 8504.50.8000.

Q: What is the MSL rating and why does it matter?

A: Both parts carry MSL 1 (Unlimited) rating, indicating unlimited shelf life without moisture bake-out requirements. This simplifies inventory management and reduces handling constraints during assembly and storage.

Q: Can I use either part in high-frequency applications?

A: Both parts are rated to 29 MHz self-resonant frequency and maintain stable inductance at the 4 MHz test frequency. The Q factor at 4 MHz is 50 for the Würth part and 45 for the Bourns part, indicating comparable performance. Verify specific frequency requirements for your application, as performance may vary outside the tested frequency range.

Q: What is the current rating and what happens if I exceed it?

A: Both parts are rated for 15 mA maximum current. Exceeding this rating may cause inductor saturation, increased DC resistance, and potential thermal damage. Verify that your circuit current does not exceed this specification.

Q: Are there packaging differences between these parts?

A: The Würth Elektronik 74479068 is supplied in standard packaging (specific format not detailed in specifications). The Bourns CV201210-6R8K is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. Both use identical 0805 (2012 Metric) component packages suitable for surface mount assembly.

Q: What operating temperature range do these parts support?

A: Both parts operate across -55°C to 125°C, covering industrial and extended commercial temperature ranges. Verify that your application environment falls within this specification.