Equivalent & Substitute Parts for Würth Elektronik 74479021

Part Overview

The Würth Elektronik 74479021 is a fixed inductor classified as a FIXED IND component. This part is currently listed with Obsolete product status. Due to its obsolescence, identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications. The substitute parts listed below provide functional equivalence based on electrical and mechanical parameter alignment.

Substiute Parts

74479021

Würth ElektronikIn Stock: 90174479021 Datasheet

Current PartRFQ

7447902

Würth ElektronikIn Stock: 28937447902 Datasheet

MFR RecommendedRFQ

CV201210-R10K

Bourns Inc.In Stock: 11631CV201210-R10K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Würth Elektronik 74479021 are identified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Inductance value: 100 nH
• Current rating: 250 mA
• DC resistance: 300 mOhm maximum
• Tolerance: ±10%
• Package type: 0805 (2012 Metric) surface mount
• Operating temperature range: -55°C to 125°C
• Frequency test point: 25 MHz
• RoHS3 compliance status
• ECCN and HTSUS classification alignment

The substitute parts maintain electrical performance specifications and mechanical compatibility within the specified parameter ranges. Shielding characteristics vary between substitute options and must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Würth Elektronik 7447902

The Würth Elektronik 7447902 is the manufacturer-recommended substitute for the obsolete 74479021. This part maintains active product status and provides equivalent electrical specifications. Both parts are manufactured by Würth Elektronik, ensuring design continuity and supply chain consistency. The 7447902 is packaged in Tape & Reel format and carries ROHS3 compliance certification with EAR99 ECCN classification, matching the regulatory requirements of the original part.

Secondary Substitute: Bourns Inc. CV201210-R10K

The Bourns CV201210-R10K provides functional equivalence with identical electrical parameters (100 nH inductance, 250 mA current rating, 300 mOhm DC resistance). This part differs in shielding configuration (shielded versus unshielded) and self-resonant frequency (235 MHz versus 225 MHz). The CV201210-R10K maintains active product status and carries equivalent regulatory compliance (ROHS3, EAR99, HTSUS 8504.50.8000). Inventory availability for this part is significantly higher at 11548 pieces.

Selection Basis:

• Both substitute parts maintain compliance with ROHS3 and export classification requirements
• Both are surface-mount components in 0805 (2012 Metric) package format
• Both operate within the -55°C to 125°C temperature range
• Electrical performance parameters (inductance, current rating, DC resistance, tolerance, Q factor) are equivalent
• Product status transition from Obsolete to Active ensures long-term supply availability

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 7447902 be used as a direct replacement for the 74479021?

A: Yes. The 7447902 is the manufacturer-recommended substitute with equivalent electrical specifications. Both parts share the same inductance value (100 nH), current rating (250 mA), DC resistance (300 mOhm maximum), and tolerance (±10%). The 7447902 maintains active product status, ensuring continued availability.

Q: What is the difference between the Würth Elektronik 7447902 and the Bourns CV201210-R10K?

A: Both parts provide equivalent inductance, current rating, and DC resistance specifications. The primary differences are: (1) Shielding configuration—the 7447902 is unshielded while the CV201210-R10K is shielded; (2) Self-resonant frequency—225 MHz for the 7447902 versus 235 MHz for the CV201210-R10K; (3) Manufacturer—Würth Elektronik versus Bourns Inc. Circuit requirements determine whether shielded or unshielded construction is appropriate.

Q: Are the package dimensions identical between substitute parts?

A: Both substitute parts use the 0805 (2012 Metric) surface-mount package. The Würth Elektronik 7447902 has dimensions of 0.079" L × 0.047" W (2.00mm × 1.20mm) with maximum seated height of 0.043" (1.10mm). The Bourns CV201210-R10K has dimensions of 0.079" L × 0.049" W (2.00mm × 1.25mm) with maximum seated height of 0.041" (1.05mm). These dimensional variations are within standard PCB layout tolerances for 0805 components.

Q: Do all parts meet RoHS3 compliance requirements?

A: Yes. The original 74479021 and both substitute parts (7447902 and CV201210-R10K) carry ROHS3 Compliant certification. All parts are classified under ECCN EAR99 and HTSUS code 8504.50.8000.

Q: Which substitute part should be selected for new designs?

A: For new designs, either substitute part is acceptable based on electrical equivalence. The Würth Elektronik 7447902 provides manufacturer continuity if the original design used Würth Elektronik components. The Bourns CV201210-R10K offers higher inventory availability (11548 pieces versus 2804 pieces). Shielding requirements determine the final selection: use the unshielded 7447902 for applications without EMI sensitivity, or the shielded CV201210-R10K for circuits requiring electromagnetic isolation.

Q: What is the moisture sensitivity level for these parts?

A: The Würth Elektronik 7447902 and Bourns CV201210-R10K both carry Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.