MPI4040R4-100-R Equivalent & Substitute Parts

Part Overview

The MPI4040R4-100-R is a 10 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 1.9 A continuous current with a DC resistance of 148 mOhm and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, making identification of suitable equivalent components essential for ongoing design support, production continuity, and system maintenance.

Substiute Parts

MPI4040R4-100-R

Eaton - Electronics DivisionIn Stock: 4794MPI4040R4-100-R Datasheet

Current PartRFQ

MPI4020V2-100-R

Eaton - Electronics DivisionIn Stock: 4632MPI4020V2-100-R Datasheet

DirectRFQ

B82464G4103M000

EPCOS - TDK ElectronicsIn Stock: 3345B82464G4103M000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPI4040R4-100-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 10 µH (fixed requirement)
• Inductance tolerance: ±20% (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 to 125°C coverage

Secondary Compatibility Criteria:

• Current rating: Must support minimum 1.9 A continuous operation
• DC resistance: Lower values preferred to minimize power dissipation
• Saturation current: Must exceed 2.6 A minimum
• Moisture sensitivity: MSL 1 (unlimited) preferred
• Physical footprint: Package dimensions should accommodate board layout constraints

Substitute parts are grouped into two categories: direct manufacturer alternatives from Eaton and cross-manufacturer equivalents from EPCOS - TDK Electronics. Both categories maintain the core electrical specifications while offering variations in current handling capability, DC resistance, and physical packaging.

Parameter Comparison

Engineering Selection Recommendations

MPI4020V2-100-R (Eaton - Electronics Division):

This part is an active product from the same manufacturer as the obsolete MPI4040R4-100-R. It maintains identical inductance (10 µH), tolerance (±20%), core type (drum core, wirewound), shielding, and operating temperature range. The MPI4020V2-100-R is RoHS compliant and carries MSL 1 rating. The primary trade-off is a reduced current rating of 1.7 A versus 1.9 A on the original part, and increased DC resistance of 281 mOhm maximum compared to 148 mOhm. This substitute is suitable for applications where the 1.7 A rating meets system requirements and where the higher DC resistance is acceptable. Physical dimensions are comparable (4.06 x 4.35 x 2.00 mm), though the package is classified as nonstandard.

B82464G4103M000 (EPCOS - TDK Electronics):

This cross-manufacturer equivalent provides superior electrical performance with a 3.4 A current rating and significantly lower DC resistance of 30 mOhm maximum. The part maintains the 10 µH inductance, ±20% tolerance, shielded drum core wirewound construction, and MSL 1 rating. The B82464G4103M000 extends the operating temperature range to 150°C and includes AEC-Q200 automotive qualification. The primary limitation is physical size: at 10.40 x 10.40 x 4.80 mm, this part is substantially larger than the original MPI4040R4-100-R (4.45 x 4.06 x 2.00 mm) and may not fit existing board layouts without redesign. This substitute is recommended for applications requiring higher current capacity, lower power dissipation, or automotive-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can the MPI4020V2-100-R directly replace the MPI4040R4-100-R in all applications?

A: The MPI4020V2-100-R is functionally compatible for applications where the continuous current requirement does not exceed 1.7 A. The saturation current of 2.2 A is lower than the original 2.6 A. If your circuit operates at or near 1.9 A, the MPI4020V2-100-R may not provide adequate margin. The increased DC resistance (281 mOhm maximum versus 148 mOhm) will result in higher power dissipation and heat generation. Verify that thermal management and current headroom are acceptable for your specific application.

Q: Why is the B82464G4103M000 physically larger than the original part?

A: The B82464G4103M000 uses ferrite core material instead of metal composite, and is designed for higher current capacity (3.4 A). The larger physical dimensions (10.40 x 10.40 x 4.80 mm) accommodate the ferrite core geometry and winding requirements for this performance level. This size difference may require PCB layout modifications if space is constrained.

Q: What are the key differences between metal composite and ferrite core materials?

A: The MPI4040R4-100-R and MPI4020V2-100-R use metal composite cores, while the B82464G4103M000 uses ferrite. Both materials provide shielding and support the 10 µH inductance specification. Ferrite cores typically offer lower DC resistance and higher current capacity but may have different frequency response characteristics. The choice depends on your circuit's frequency of operation and thermal requirements.

Q: Is the B82464G4103M000 suitable for automotive applications?

A: Yes. The B82464G4103M000 carries AEC-Q200 qualification and ROHS3 compliance, making it suitable for automotive-grade applications. The MPI4040R4-100-R and MPI4020V2-100-R do not specify AEC-Q200 rating. If your application requires automotive qualification, the B82464G4103M000 is the appropriate choice.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level. Components with MSL 1 have unlimited shelf life and do not require special moisture-controlled storage or baking procedures before soldering. All three parts in this comparison carry MSL 1 rating, so moisture handling is equivalent across all options.

Q: Can I use the B82464G4103M000 in a space-constrained design?

A: The B82464G4103M000 dimensions (10.40 x 10.40 x 4.80 mm) are approximately 2.3 times larger in length and width than the original MPI4040R4-100-R (4.45 x 4.06 x 2.00 mm). If your PCB layout has limited space, this part will not fit without significant redesign. In space-constrained applications, the MPI4020V2-100-R is the better choice due to comparable physical dimensions.

Q: What is the difference between "1816 (4540 Metric)" and "Nonstandard" package designations?

A: The MPI4040R4-100-R uses the standardized 1816 (4540 Metric) package designation. The MPI4020V2-100-R and B82464G4103M000 are listed as nonstandard packages, indicating they do not conform to standard EIA package naming conventions. This may affect footprint availability in design libraries and requires verification of exact pad layouts before PCB design.

Q: Which substitute part should I choose for a direct replacement?

A: For a direct replacement with minimal design changes, select the MPI4020V2-100-R. It is from the same manufacturer, maintains the same inductance and tolerance, and has comparable physical dimensions. For applications requiring higher current capacity and lower power dissipation, select the B82464G4103M000, but plan for PCB layout modifications due to its larger size.