MPI4040R3-4R7-R Equivalent & Substitute Parts

Part Overview

The MPI4040R3-4R7-R is a 4.7 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 2.3 A continuous current with a DC resistance of 92 mOhm and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design requirements and procurement needs.

Substiute Parts

MPI4040R3-4R7-R

Eaton - Electronics DivisionIn Stock: 3503MPI4040R3-4R7-R Datasheet

Current PartRFQ

MPI4020V2-4R7-R

Eaton - Electronics DivisionIn Stock: 6082MPI4020V2-4R7-R Datasheet

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B82464G4472M000

EPCOS - TDK ElectronicsIn Stock: 9655B82464G4472M000 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MPI4040R3-4R7-R are selected based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value: 4.7 µH (exact match required)
• Inductance tolerance: ±20% (standard tolerance maintained)
• Shielding: Shielded configuration
• Core type: Drum core wirewound construction
• Mounting: Surface mount technology
• Test frequency: 100 kHz

Secondary Compatibility Parameters:

• Operating temperature range: -55°C minimum and 125°C minimum upper limit
• Current rating: Equal to or greater than 2.3 A
• DC resistance: Acceptable within application thermal and efficiency constraints
• Saturation current: Sufficient margin above nominal operating current

The identified substitutes maintain the core inductance specification and shielded drum core architecture while offering variations in current handling capability, DC resistance, and core material composition.

Parameter Comparison

Engineering Selection Recommendations

MPI4020V2-4R7-R (Eaton - Electronics Division)

This substitute maintains identical inductance, tolerance, and operating temperature specifications as the obsolete MPI4040R3-4R7-R. The MPI4020V2-4R7-R offers increased current rating (2.7 A versus 2.3 A) and is classified as active product status with ROHS3 compliance. Physical dimensions are comparable (4.06mm x 4.35mm versus 4.45mm x 4.06mm), with slightly increased height (2.00mm versus 1.85mm). DC resistance increases to 118 mOhm maximum, representing a 28% increase from the original 92 mOhm specification. This substitute is suitable for applications where the higher DC resistance is acceptable and the increased current margin provides design flexibility.

B82464G4472M000 (EPCOS - TDK Electronics)

This substitute provides identical inductance and tolerance with significantly enhanced current handling (4.9 A versus 2.3 A) and substantially lower DC resistance (15 mOhm maximum versus 92 mOhm). The ferrite core material differs from the metal composite core of the original part. Operating temperature extends to 150°C maximum. The component includes AEC-Q200 automotive qualification. Physical dimensions are substantially larger (10.40mm x 10.40mm with 4.80mm height), requiring PCB layout verification. This substitute is appropriate for applications requiring superior thermal performance and higher current capacity, provided space constraints permit the larger package footprint.

Frequently Asked Questions (FAQ)

Q: Can MPI4020V2-4R7-R directly replace MPI4040R3-4R7-R in all applications?

A: The MPI4020V2-4R7-R maintains the same inductance value (4.7 µH), tolerance (±20%), shielding, and operating temperature range. However, DC resistance increases from 92 mOhm to 118 mOhm maximum. Applications sensitive to inductor losses or thermal dissipation must evaluate this 28% resistance increase. Physical dimensions are comparable but not identical, requiring PCB layout verification.

Q: What are the key differences between the two Eaton substitutes?

A: MPI4020V2-4R7-R is the direct Eaton equivalent with minimal specification changes and comparable package size. B82464G4472M000 is a different manufacturer (EPCOS - TDK Electronics) with ferrite core technology, significantly lower DC resistance (15 mOhm), higher current rating (4.9 A), and larger physical dimensions (10.40mm x 10.40mm). Selection depends on thermal requirements, space availability, and current handling needs.

Q: Is the B82464G4472M000 suitable for space-constrained applications?

A: No. The B82464G4472M000 measures 10.40mm x 10.40mm x 4.80mm, substantially larger than the original MPI4040R3-4R7-R (4.45mm x 4.06mm x 1.85mm). This substitute requires significant PCB layout modification and is appropriate only for applications with adequate board space.

Q: How does core material affect substitution compatibility?

A: The original MPI4040R3-4R7-R uses metal composite core material. MPI4020V2-4R7-R maintains metal composite construction. B82464G4472M000 uses ferrite core material. While all three maintain the specified 4.7 µH inductance at 100 kHz test frequency, ferrite cores exhibit different frequency response characteristics and temperature stability. Frequency-dependent circuit behavior must be evaluated when substituting ferrite for metal composite cores.

Q: Are all substitutes RoHS compliant?

A: MPI4020V2-4R7-R and B82464G4472M000 are both ROHS3 compliant. The original MPI4040R3-4R7-R RoHS status is not specified. All three components are REACH unaffected and classified as EAR99 for export control purposes.

Q: What is the saturation current significance in substitution?

A: Saturation current (Isat) indicates the current level at which inductor core saturation begins, causing inductance degradation. MPI4040R3-4R7-R has Isat of 4.8 A with 2.3 A rating. MPI4020V2-4R7-R has Isat of 3.2 A with 2.7 A rating, providing less saturation margin. B82464G4472M000 has Isat of 5.2 A with 4.9 A rating, providing greater margin. Applications with transient current spikes must verify adequate saturation margin in the selected substitute.

Q: Can packaging format differences affect procurement?

A: MPI4020V2-4R7-R and B82464G4472M000 are supplied in Tape & Reel (TR) format. The original MPI4040R3-4R7-R packaging format is not specified. TR packaging is standard for automated assembly processes. Verify compatibility with existing pick-and-place equipment and tape specifications before procurement.