MPI4040R1-3R3-R Equivalent & Substitute Parts

Part Overview

The MPI4040R1-3R3-R is a 3.3 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 2.2 A continuous current with 115mOhm DC resistance and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, necessitating identification of active equivalent components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

MPI4040R1-3R3-R

Eaton - Electronics DivisionIn Stock: 929MPI4040R1-3R3-R Datasheet

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MPI4015V2-3R3-R

Eaton - Electronics DivisionIn Stock: 4631MPI4015V2-3R3-R Datasheet

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B82462G4332M000

EPCOS - TDK ElectronicsIn Stock: 9356B82462G4332M000 Datasheet

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SRP4012TA-3R3M

Bourns Inc.In Stock: 2721SRP4012TA-3R3M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPI4040R1-3R3-R is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 3.3 µH (fixed requirement)
• Inductance tolerance: ±20% (fixed requirement)
• Inductance test frequency: 100 kHz (fixed requirement)
• Core type: Drum core, wirewound (fixed requirement)
• Shielding: Shielded (fixed requirement)
• Mounting type: Surface mount (fixed requirement)
• Operating temperature range: Minimum -55°C, maximum 125°C or higher
• Moisture sensitivity level: MSL 1 (unlimited)

Secondary Compatibility Parameters:

• Current rating: 2.2 A minimum
• DC resistance: Acceptable range based on circuit design tolerance
• Package dimensions: Physical compatibility with PCB layout

The three substitute parts identified (MPI4015V2-3R3-R, B82462G4332M000, SRP4012TA-3R3M) meet all primary substitution criteria. Variations in current rating, DC resistance, and package dimensions are noted for engineering evaluation based on specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

MPI4015V2-3R3-R (Eaton - Electronics Division)

This substitute maintains the same manufacturer lineage as the obsolete MPI4040R1-3R3-R and belongs to the active MPI40-V2 series. It provides identical inductance, tolerance, and operating temperature range. The higher current rating (3 A versus 2.2 A) and lower DC resistance (92mOhm Max versus 115mOhm) offer improved performance margins. The 2-SMD package configuration differs from the original 1816 case, requiring PCB layout verification. ROHS3 compliance and active product status ensure long-term availability. This option is preferred for applications where the original Eaton product line continuity is required.

B82462G4332M000 (EPCOS - TDK Electronics)

This substitute provides the lowest DC resistance (31mOhm Max) among all options, resulting in reduced power dissipation. The ferrite core material differs from the metal composite core of the main part. The nonstandard package (6.30mm x 6.30mm) and significantly greater height (3.00mm) require substantial PCB redesign. The extended operating temperature range (-55°C to 150°C) exceeds the original specification. AEC-Q200 automotive qualification and ROHS3 compliance are provided. This option is suitable only when PCB layout can accommodate the larger footprint and when the lower DCR is a circuit requirement.

SRP4012TA-3R3M (Bourns Inc.)

This substitute maintains identical physical dimensions and height to the original MPI4040R1-3R3-R, enabling direct PCB footprint compatibility. The carbonyl powder core material differs from the metal composite core. DC resistance (97mOhm Max) is comparable to the original specification. The measured Q factor (10 @ 100kHz) and self-resonant frequency (41 MHz) are provided. AEC-Q200 automotive qualification and ROHS3 compliance are included. The extended operating temperature range (-40°C to 150°C) covers the original specification. This option is optimal for applications requiring minimal PCB modification.

Frequently Asked Questions (FAQ)

Q: Can MPI4015V2-3R3-R be used as a direct replacement for MPI4040R1-3R3-R?

A: Electrical substitution is valid. The MPI4015V2-3R3-R maintains identical inductance (3.3 µH), tolerance (±20%), and operating temperature range (-55°C to 125°C). However, the package changes from 1816 (4540 Metric) to 2-SMD, requiring PCB layout verification. The higher current rating (3 A) and lower DC resistance (92mOhm Max) are compatible with circuits designed for the 2.2 A / 115mOhm specification.

Q: What are the key differences between the three substitute parts?

A: The three substitutes differ in core material, package dimensions, and DC resistance. MPI4015V2-3R3-R uses metal composite core with 92mOhm DCR in a 2-SMD package. B82462G4332M000 uses ferrite core with 31mOhm DCR in a larger nonstandard package (6.30mm x 6.30mm). SRP4012TA-3R3M uses carbonyl powder core with 97mOhm DCR and maintains the original 1816 footprint dimensions.

Q: Which substitute requires the least PCB modification?

A: SRP4012TA-3R3M requires no PCB footprint modification. It maintains identical dimensions (0.175" L x 0.160" W) and height (0.047") as the original MPI4040R1-3R3-R, enabling direct component replacement on existing PCB layouts.

Q: Are all substitute parts RoHS compliant?

A: Yes. MPI4015V2-3R3-R, B82462G4332M000, and SRP4012TA-3R3M are all ROHS3 compliant. The original MPI4040R1-3R3-R RoHS status is not specified in the provided data.

Q: What is the impact of different core materials on circuit performance?

A: Core material affects frequency response, temperature stability, and saturation characteristics. The original metal composite core (MPI4040R1-3R3-R) differs from the metal composite (MPI4015V2-3R3-R), ferrite (B82462G4332M000), and carbonyl powder (SRP4012TA-3R3M) cores used in substitutes. Circuit validation is required when core material changes.

Q: Can B82462G4332M000 be used in space-constrained applications?

A: No. B82462G4332M000 has significantly larger dimensions (6.30mm x 6.30mm footprint, 3.00mm height) compared to the original part (4.45mm x 4.06mm footprint, 1.20mm height). This substitute requires substantial PCB redesign and is unsuitable for space-constrained layouts.

Q: What is the saturation current consideration for substitution?

A: Saturation current (Isat) indicates the current level at which inductance begins to degrade. The original MPI4040R1-3R3-R has Isat of 5.1 A. Substitutes have lower Isat values: MPI4015V2-3R3-R (3.2 A), B82462G4332M000 (2.1 A), and SRP4012TA-3R3M (3 A). Circuit peak current must remain below the substitute's Isat rating.

Q: Are automotive-grade certifications available for all substitutes?

A: B82462G4332M000 and SRP4012TA-3R3M carry AEC-Q200 automotive qualification. MPI4015V2-3R3-R does not list AEC-Q200 certification in the provided data. Automotive applications should specify AEC-Q200 requirement during component selection.