Würth Elektronik 74479977182 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74479977182 is a 820 nH shielded multilayer inductor rated for 2 A with a maximum DC resistance of 112 mOhm in a 0806 (2016 Metric) surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across the -40°C to 125°C temperature range and meets ROHS3 compliance standards.

Substiute Parts

74479977182

Würth ElektronikIn Stock: 73674479977182 Datasheet

Current PartRFQ

74479276210

Würth ElektronikIn Stock: 525474479276210 Datasheet

MFR RecommendedRFQ

74479276210C

Würth ElektronikIn Stock: 729474479276210C Datasheet

MFR RecommendedRFQ

74479876210C

Würth ElektronikIn Stock: 466474479876210C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74479977182 are identified based on the following allowable parameters:

• Inductance Value: Substitute parts must operate within the tolerance band of the original part or provide functionally equivalent inductance for the application
• Current Rating: Substitute parts must meet or exceed the 2 A current rating requirement
• DC Resistance: Lower or equivalent DC resistance values are acceptable
• Package / Case: Surface mount packages in 0806 (2016 Metric) or compatible footprints
• Shielding: Shielded construction maintained across all substitutes
• Operating Temperature Range: -40°C to 125°C compatibility required
• Compliance Standards: ROHS3 compliance and MSL rating maintained

The substitute parts listed (74479276210, 74479276210C, 74479876210C) represent higher inductance values (1 µH) from the same manufacturer's active product lines, offering improved current handling and lower DC resistance characteristics while maintaining the same thermal and compliance specifications.

Parameter Comparison

Engineering Selection Recommendations

74479276210 (Würth Elektronik WE-PMCI Series)

This part is recommended as the primary substitute. It maintains the 0806 (2016 Metric) package footprint, offers improved DC resistance (75 mOhm vs. 112 mOhm), and is classified as active product status. The higher saturation current (2.5 A) and increased self-resonant frequency (50 MHz) provide enhanced performance margins. ROHS3 compliance and MSL 1 rating are maintained.

74479276210C (Würth Elektronik WE-PMCI Series)

This alternative provides the lowest DC resistance (65 mOhm) and highest saturation current (3.1 A) among available substitutes. The 0805 (2012 Metric) package requires PCB layout verification for footprint compatibility. Active product status ensures long-term availability. ROHS3 compliance and MSL 1 rating are maintained.

74479876210C (Würth Elektronik WE-PMI Series)

This part maintains the 0806 (2016 Metric) package and multilayer construction type matching the original design. However, the 1.8 A current rating falls below the original 2 A specification and is classified as obsolete product status, limiting its suitability for new designs.

Frequently Asked Questions (FAQ)

Q: Can the 74479276210 be used as a direct replacement for the 74479977182?

A: The 74479276210 is functionally equivalent within the allowable electrical parameters. Both parts maintain the same 0806 (2016 Metric) surface mount package, 2 A current rating, shielded construction, and operating temperature range. The substitute offers improved DC resistance and saturation current characteristics. PCB layout compatibility should be verified.

Q: What is the inductance difference between the main part and substitutes?

A: The main part (74479977182) is rated at 820 nH with ±20% tolerance. The substitute parts are rated at 1 µH (1000 nH), representing approximately a 22% increase in nominal inductance value. Circuit performance impact depends on application-specific frequency response and impedance requirements.

Q: Is the 74479276210C compatible with the original PCB layout?

A: The 74479276210C uses a 0805 (2012 Metric) package, which differs from the original 0806 (2016 Metric) package. Physical dimensions and footprint compatibility must be verified against the PCB design. The 0805 package is smaller and may not be compatible with existing PCB layouts without modification.

Q: Why are the substitute parts rated at higher inductance values?

A: The substitute parts (1 µH) represent the available active product alternatives from Würth Elektronik's current portfolio. The original 820 nH multilayer inductor (74479977182) is obsolete. The 1 µH substitutes provide equivalent or superior electrical performance while maintaining compliance and thermal specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (74479276210, 74479276210C, 74479876210C) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's compliance profile.

Q: Which substitute is recommended for new designs?

A: The 74479276210 is recommended for new designs. It is classified as active product status, maintains the original 0806 (2016 Metric) package footprint, and provides improved electrical characteristics with lower DC resistance and higher saturation current compared to the obsolete original part.