7447789147W Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7447789147W is a 47 µH shielded drum core wirewound inductor rated for 850 mA continuous current with a maximum DC resistance of 360 mOhm. This component is designed for surface mount applications requiring compact form factor and electromagnetic shielding. The part is currently active in production and ROHS3 compliant, making it suitable for modern electronic assemblies. Equivalent parts may be required due to inventory constraints, regional availability, or specific application performance requirements within the defined electrical and mechanical parameter ranges.

Substiute Parts

7447789147W

Würth ElektronikIn Stock: 10087447789147W Datasheet

Current PartRFQ

P1166.473NLT

Pulse ElectronicsIn Stock: 2141P1166.473NLT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7447789147W is determined by strict alignment with the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 47 µH (±20% tolerance acceptable)
• Current rating: minimum 830 mA (within 97.6% of original 850 mA rating)
• DC resistance: maximum 260 mOhm (lower resistance acceptable; higher resistance not permitted)
• Shielding: shielded construction required
• Mounting: surface mount, nonstandard package footprint
• Operating temperature: minimum -40°C to 125°C range
• Compliance: ROHS3 compliant, MSL 1 rating

The Pulse Electronics P1166.473NLT meets all substitution criteria. The part maintains identical inductance and tolerance specifications, current rating within acceptable operational limits, superior DC resistance performance, and equivalent environmental compliance ratings. Physical dimensions remain within compatible nonstandard package specifications for surface mount assembly.

Parameter Comparison

Engineering Selection Recommendations

The P1166.473NLT from Pulse Electronics qualifies as a direct substitute for the 7447789147W based on electrical parameter alignment and regulatory compliance. Both components maintain ROHS3 compliance and MSL 1 ratings, ensuring compatibility with modern manufacturing and storage requirements. The substitute part demonstrates superior DC resistance performance (260 mOhm vs. 360 mOhm maximum), which reduces power dissipation in equivalent current applications. Current rating variance of 20 mA (830 mA vs. 850 mA) remains within acceptable operational margins for most circuit designs. Physical package dimensions show minimal variance (0.24mm length and width increase, 0.01mm height increase), which typically accommodates standard PCB layout tolerances for nonstandard surface mount packages. Extended operating temperature range to 130°C provides additional thermal margin in high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can the P1166.473NLT be used as a direct replacement for the 7447789147W in existing designs?

A: Yes. Both components share identical inductance values, tolerance specifications, and shielding characteristics. The substitute part meets or exceeds all critical electrical parameters and maintains equivalent regulatory compliance. PCB layout modifications are not required due to compatible package dimensions.

Q: What is the significance of the DC resistance difference between these parts?

A: The P1166.473NLT exhibits lower maximum DC resistance (260 mOhm vs. 360 mOhm). This represents improved performance, resulting in reduced resistive losses and lower heat generation at equivalent current levels. This characteristic is beneficial in power-sensitive applications.

Q: Are there any thermal considerations when substituting these parts?

A: The P1166.473NLT operates across a wider temperature range (-40°C to 130°C vs. -40°C to 125°C). Both components maintain MSL 1 ratings, indicating unlimited moisture sensitivity protection. No additional thermal management modifications are required for standard operating conditions.

Q: How do the current ratings compare?

A: The 7447789147W is rated for 850 mA continuous current, while the P1166.473NLT is rated for 830 mA. This 20 mA difference represents 97.6% equivalence. For applications operating below 830 mA, both parts are fully compatible. Applications requiring the full 850 mA rating should verify that the 830 mA rating of the substitute part meets circuit requirements.

Q: Are package dimensions identical?

A: Package dimensions are compatible but not identical. The P1166.473NLT measures 7.54mm x 7.54mm x 4.61mm compared to 7.30mm x 7.30mm x 4.60mm for the 7447789147W. Dimensional variance is minimal and typically accommodates standard PCB layout tolerances for nonstandard surface mount packages. Verify PCB footprint clearances for your specific application.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 7447789147W and P1166.473NLT are ROHS3 compliant with MSL 1 ratings and REACH unaffected status. Regulatory compliance is equivalent for both components.