MPIA4040R4-6R8-R Equivalent & Substitute Parts

Part Overview

The MPIA4040R4-6R8-R is a 6.8 µH shielded molded inductor manufactured by Eaton - Electronics Division, rated for 2.4 A continuous current with a maximum DC resistance of 91 mOhm. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -55°C to 125°C and meets AEC-Q200 automotive qualification standards.

Substiute Parts

MPIA4040R4-6R8-R

Eaton - Electronics DivisionIn Stock: 954MPIA4040R4-6R8-R Datasheet

Current PartRFQ

MPIA4020V2-6R8-R

Eaton - Electronics DivisionIn Stock: 2164MPIA4020V2-6R8-R Datasheet

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B82464G4682M000

EPCOS - TDK ElectronicsIn Stock: 9407B82464G4682M000 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MPIA4040R4-6R8-R are identified based on the following critical electrical and mechanical parameters:

Primary Matching Criteria:

• Inductance value: 6.8 µH (±20% tolerance band)
• Inductance test frequency: 100 kHz
• Shielding requirement: Shielded configuration
• Mounting technology: Surface Mount
• AEC-Q200 qualification: Required for automotive applications

Secondary Compatibility Factors:

• Current rating capability: Minimum 2.4 A continuous
• Saturation current (Isat): Minimum 3.2 A
• Operating temperature range: -55°C to 125°C minimum
• DC resistance: Evaluated against application thermal and efficiency requirements

Two substitute parts meet these criteria with variations in core material type, current handling capacity, and DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

MPIA4020V2-6R8-R (Eaton - Electronics Division)

This substitute is the primary equivalent from the same manufacturer family. It maintains identical inductance, tolerance, and operating temperature specifications. The part is currently in active production status with 2100 units in stock inventory. It carries full AEC-Q200 qualification and RoHS compliance certification.

Trade-off consideration: The current rating is reduced to 2.0 A (versus 2.4 A main part) and saturation current to 2.6 A (versus 3.2 A). DC resistance increases to 192 mOhm maximum (versus 91 mOhm). This substitute is suitable for applications where the 2.0 A continuous current rating is sufficient. The higher DC resistance results in increased power dissipation and thermal generation.

B82464G4682M000 (EPCOS - TDK Electronics)

This substitute offers superior electrical performance with 4.3 A current rating and 4.6 A saturation current, providing significant current margin above the original 2.4 A specification. DC resistance is substantially lower at 20 mOhm maximum, reducing thermal losses. The part is in active production with 9373 units in stock and carries AEC-Q200 qualification with ROHS3 compliance.

Trade-off consideration: Physical dimensions are significantly larger (10.40 x 10.40 mm footprint, 4.80 mm height versus 4.45 x 4.06 mm and 2.00 mm for the main part). Core material differs (ferrite drum core wirewound versus metal composite molded). This substitute is suitable for applications with available PCB space and where lower DC resistance and higher current capacity provide system benefits.

Selection Basis:

• Both substitutes maintain the 6.8 µH inductance value and ±20% tolerance specification
• Both are tested at 100 kHz per original specification
• Both provide shielded surface mount configurations
• Both meet AEC-Q200 automotive qualification requirements
• MPIA4020V2-6R8-R is recommended for space-constrained designs requiring minimal footprint change
• B82464G4682M000 is recommended for applications prioritizing lower losses and higher current capacity

Frequently Asked Questions (FAQ)

Q: Can MPIA4020V2-6R8-R directly replace MPIA4040R4-6R8-R in all applications?

A: The MPIA4020V2-6R8-R maintains identical inductance (6.8 µH), tolerance (±20%), and operating temperature range (-55°C to 125°C). However, the current rating is reduced from 2.4 A to 2.0 A, and saturation current decreases from 3.2 A to 2.6 A. Substitution is valid only when the application circuit operates at or below 2.0 A continuous current. DC resistance increases from 91 mOhm to 192 mOhm, resulting in higher power dissipation. Thermal analysis of the application is required to confirm acceptability.

Q: What are the physical compatibility considerations for B82464G4682M000?

A: The B82464G4682M000 has a significantly larger footprint (10.40 x 10.40 mm versus 4.45 x 4.06 mm) and greater height (4.80 mm versus 2.00 mm). PCB layout redesign is necessary. The package is nonstandard, requiring verification of land pattern compatibility with your assembly process. This substitute is suitable only when PCB space permits the larger component dimensions.

Q: Are both substitutes qualified to the same automotive standards as the original part?

A: Yes. Both MPIA4020V2-6R8-R and B82464G4682M000 carry AEC-Q200 qualification, matching the original MPIA4040R4-6R8-R specification. Both are RoHS compliant (MPIA4020V2-6R8-R is RoHS Compliant; B82464G4682M000 is ROHS3 Compliant). Moisture sensitivity level is 1 (Unlimited) for all three parts.

Q: How do the DC resistance differences affect circuit performance?

A: DC resistance directly impacts power dissipation and thermal generation. The original part specifies 91 mOhm maximum. MPIA4020V2-6R8-R increases this to 192 mOhm (2.1× higher), while B82464G4682M000 reduces it to 20 mOhm (0.22× lower). At 2.0 A continuous current, MPIA4020V2-6R8-R dissipates approximately 0.768 W (I²R = 4 × 0.192), compared to 0.364 W for the original part at the same current. B82464G4682M000 dissipates only 0.080 W at 2.0 A. Application thermal budget must accommodate these differences.

Q: What is the inductance test frequency, and does it affect substitution validity?

A: All three parts are tested at 100 kHz per specification. This is the reference frequency for inductance value verification. Substitution is valid at this frequency. Actual inductance behavior at other operating frequencies may differ due to core material properties and self-resonant frequency characteristics (MPIA4020V2-6R8-R: 23 MHz; B82464G4682M000: 28 MHz). Circuit designers must account for frequency-dependent inductance variation in high-frequency applications.

Q: Which substitute offers the best overall compatibility with the original design?

A: MPIA4020V2-6R8-R from Eaton - Electronics Division is the closest functional equivalent, maintaining the same manufacturer family, identical physical height (2.00 mm), similar footprint dimensions, and matching operating temperature range. It is recommended as the primary substitute for designs where the 2.0 A current rating is acceptable. B82464G4682M000 is recommended only when superior electrical performance (lower DCR, higher current capacity) justifies PCB layout redesign and larger component footprint.