MPIA4040R3-6R8-R Equivalent & Substitute Parts

Part Overview

The MPIA4040R3-6R8-R is a 6.8 µH shielded molded inductor manufactured by Eaton - Electronics Division, rated for 2 A continuous current with a maximum DC resistance of 120 mOhm. This component features a metal composite core and is qualified to AEC-Q200 standards for automotive applications. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

MPIA4040R3-6R8-R

Eaton - Electronics DivisionIn Stock: 832MPIA4040R3-6R8-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 MPIA4040R3-6R8-R are selected based on strict equivalence of the following critical parameters:

Primary Equivalence Criteria:

• Inductance value: 6.8 µH (±20% tolerance)
• Current rating: minimum 2 A continuous
• Shielding: shielded construction required
• AEC-Q200 qualification: mandatory for automotive applications
• Operating temperature range: minimum -55°C ~ 125°C
• Mounting type: surface mount

Secondary Compatibility Factors:

• DC resistance within acceptable limits for the application
• Saturation current (Isat) sufficient to prevent core saturation under peak load conditions
• Moisture sensitivity level MSL 1 or equivalent

Two substitute parts meet these criteria with documented equivalence:

1. MPIA4020V2-6R8-R (Eaton - Electronics Division): Active product with identical inductance, current rating, and temperature range. Higher DC resistance (192 mOhm) requires thermal performance verification in the target application.

2. B82464G4682M000 (EPCOS - TDK Electronics): Active product with identical inductance and AEC-Q200 rating. Exceeds current rating (4.3 A) and offers superior DC resistance (20 mOhm). Extended temperature range (-55°C ~ 150°C) and larger package footprint (10.40mm x 10.40mm) require PCB layout compatibility assessment.

Parameter Comparison

Engineering Selection Recommendations

MPIA4020V2-6R8-R Selection Criteria:

This substitute is recommended when PCB layout space is constrained and the original MPIA4040R3-6R8-R footprint must be preserved. The MPIA4020V2-6R8-R maintains identical inductance, current rating, and operating temperature range. Both parts are manufactured by Eaton and share the same metal composite core technology. The increased DC resistance (192 mOhm versus 120 mOhm) results in higher power dissipation; thermal analysis of the target circuit is required to confirm acceptable operating conditions. This part is active and RoHS compliant, supporting long-term supply chain continuity.

B82464G4682M000 Selection Criteria:

This substitute is recommended for applications where superior DC resistance performance and higher current capacity provide design margin. The B82464G4682M000 offers 20 mOhm maximum DC resistance, reducing I²R losses by approximately 83% compared to the original part. The 4.3 A current rating provides 115% margin above the 2 A requirement. Extended operating temperature range (-55°C ~ 150°C) accommodates higher ambient conditions. The ferrite drum core construction differs from the original metal composite design; electromagnetic performance in the target circuit must be validated. The significantly larger footprint (10.40mm x 10.40mm versus 4.45mm x 4.06mm) and height (4.80mm versus 1.80mm) require PCB layout redesign. This part is active, ROHS3 compliant, and REACH unaffected, ensuring regulatory compliance and supply availability.

Product Status Consideration:

Both substitute parts are active products with established supply chains. The MPIA4040R3-6R8-R obsolete status necessitates transition to one of these alternatives for new production or redesign activities.

Frequently Asked Questions (FAQ)

Q: Can MPIA4020V2-6R8-R directly replace MPIA4040R3-6R8-R without circuit modification?

A: Direct replacement is possible if the application tolerates the increased DC resistance (192 mOhm versus 120 mOhm). The higher resistance increases power dissipation by 60%, which may affect thermal performance. Electrical equivalence is maintained for inductance, current rating, and operating temperature. Physical dimensions differ slightly (4.95mm x 4.20mm versus 4.45mm x 4.06mm), requiring PCB footprint verification.

Q: What are the key differences between the B82464G4682M000 and the original MPIA4040R3-6R8-R?

A: The B82464G4682M000 differs in four primary aspects: (1) Core material is ferrite versus metal composite, affecting frequency response and EMI characteristics; (2) DC resistance is 20 mOhm versus 120 mOhm, significantly reducing power loss; (3) Package footprint is substantially larger (10.40mm x 10.40mm versus 4.45mm x 4.06mm), requiring PCB redesign; (4) Current rating is 4.3 A versus 2 A, providing additional design margin. Inductance value, tolerance, and AEC-Q200 rating remain equivalent.

Q: Are both substitute parts AEC-Q200 qualified?

A: Yes. Both MPIA4020V2-6R8-R and B82464G4682M000 carry AEC-Q200 qualification, meeting automotive reliability standards equivalent to the original MPIA4040R3-6R8-R.

Q: Which substitute part is preferred for space-constrained applications?

A: MPIA4020V2-6R8-R is preferred for space-constrained designs. Its footprint (4.95mm x 4.20mm) closely matches the original part (4.45mm x 4.06mm), minimizing PCB layout changes. The B82464G4682M000 footprint (10.40mm x 10.40mm) is approximately 5.6 times larger and requires significant PCB redesign.

Q: What is the impact of increased DC resistance in MPIA4020V2-6R8-R?

A: The 60% increase in DC resistance (from 120 mOhm to 192 mOhm) increases power dissipation according to P = I²R. At 2 A continuous current, dissipation increases from 480 mW to 768 mW. Thermal management and component temperature rise must be evaluated in the target application to ensure reliable operation within the -55°C ~ 125°C operating range.

Q: Can B82464G4682M000 be used in applications requiring the original compact package?

A: No. The B82464G4682M000 package (10.40mm x 10.40mm x 4.80mm height) is incompatible with PCB layouts designed for the original MPIA4040R3-6R8-R (4.45mm x 4.06mm x 1.80mm height). PCB redesign is mandatory if this substitute is selected.

Q: What is the saturation current significance for these parts?

A: Saturation current (Isat) indicates the current level at which core saturation begins, causing inductance degradation. The original part has Isat of 4.5 A (2.25× the 2 A rating), providing adequate margin. MPIA4020V2-6R8-R has Isat of 2.6 A (1.3× the 2 A rating), offering reduced margin; transient current spikes must not exceed this threshold. B82464G4682M000 has Isat of 4.6 A (1.07× its 4.3 A rating), providing comparable margin to the original part.

Q: Are moisture sensitivity levels equivalent across all three parts?

A: Yes. All three parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Storage and handling requirements are identical.