MPIA4040R3-3R3-R Equivalent & Substitute Parts

Part Overview

The MPIA4040R3-3R3-R is a 3.3 µH shielded molded inductor manufactured by Eaton - Electronics Division, rated for 3 A continuous current with 60mOhm DC resistance. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design support and procurement continuity. The part is qualified to AEC-Q200 standards and operates across the -55°C to 125°C temperature range.

Substiute Parts

MPIA4040R3-3R3-R

Eaton - Electronics DivisionIn Stock: 703MPIA4040R3-3R3-R Datasheet

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MPIA4020V2-3R3-R

Eaton - Electronics DivisionIn Stock: 975MPIA4020V2-3R3-R Datasheet

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ETQ-P3M3R3KVN

Panasonic Electronic ComponentsIn Stock: 7182ETQ-P3M3R3KVN Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MPIA4040R3-3R3-R are identified based on the following critical electrical and mechanical parameters:

Primary Matching Criteria:

• Inductance value: 3.3 µH (±20% tolerance)
• Shielding requirement: Shielded construction
• Mounting type: Surface Mount
• Core material: Metal Composite
• AEC-Q200 qualification
• Inductance test frequency: 100 kHz
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Parameters:

• Current rating capability (minimum 3 A)
• DC resistance performance
• Operating temperature range (-55°C to 125°C minimum)
• Package compatibility with surface mount assembly

The MPIA4020V2-3R3-R and ETQ-P3M3R3KVN meet these criteria with variations in current handling capacity, DC resistance, and physical dimensions that remain within acceptable substitution parameters for this inductor category.

Parameter Comparison

Engineering Selection Recommendations

MPIA4020V2-3R3-R (Eaton - Electronics Division):

This substitute maintains manufacturer continuity within the Eaton product line. The part is active and carries ROHS3 compliance certification. Current rating of 3.3 A exceeds the main part requirement of 3 A. DC resistance increases to 85mOhm maximum compared to 60mOhm, representing a 42% increase in resistive losses. Saturation current of 4 A is lower than the main part's 6.6 A. Operating temperature range remains -55°C to 125°C. Physical dimensions increase slightly (0.195" L x 0.165" W vs. 0.175" L x 0.160" W). This substitute is suitable for applications where the higher DC resistance and lower saturation current are acceptable within circuit design margins.

ETQ-P3M3R3KVN (Panasonic Electronic Components):

This substitute provides superior electrical performance with 6.1 A current rating and 26.51mOhm maximum DC resistance, representing a 56% reduction in resistive losses compared to the main part. Saturation current reaches 11.5 A, significantly exceeding the main part specification. The part qualifies to AEC-Q200 and carries ROHS3 compliance. Operating temperature range extends to 155°C, providing additional thermal margin. Physical dimensions are larger (0.252" L x 0.236" W). The wirewound drum core construction differs from the molded type of the main part. This substitute is suitable for applications requiring lower losses and higher current handling capacity, provided PCB layout accommodates the larger footprint.

Both substitutes maintain the critical 3.3 µH inductance value, ±20% tolerance, shielded construction, surface mount configuration, and AEC-Q200 qualification required for functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can MPIA4020V2-3R3-R directly replace MPIA4040R3-3R3-R in existing designs?

A: Direct replacement is possible if circuit design tolerates the increased DC resistance (85mOhm vs. 60mOhm) and lower saturation current (4 A vs. 6.6 A). The inductance value, tolerance, shielding, and operating temperature range are identical. Physical dimensions differ slightly, requiring PCB layout verification.

Q: What are the implications of the higher DC resistance in MPIA4020V2-3R3-R?

A: The 85mOhm maximum DCR increases resistive losses by approximately 42% compared to the 60mOhm main part. In power conversion applications, this results in higher heat dissipation. Circuit designers must verify that thermal management and efficiency specifications remain within acceptable limits.

Q: Why does ETQ-P3M3R3KVN have significantly lower DC resistance?

A: The ETQ-P3M3R3KVN employs wirewound drum core construction with higher current capacity (6.1 A vs. 3 A), resulting in lower resistance characteristics. This design approach prioritizes efficiency and thermal performance at the cost of increased physical size.

Q: Are there package compatibility concerns with the substitute parts?

A: The main part uses a nonstandard package, while both substitutes employ 2-SMD, J-Lead configuration. PCB footprint and assembly process compatibility must be evaluated. The ETQ-P3M3R3KVN has larger physical dimensions (0.252" L x 0.236" W vs. 0.175" L x 0.160" W), potentially requiring PCB layout modifications.

Q: Do all parts meet automotive qualification requirements?

A: All three parts carry AEC-Q200 qualification, meeting automotive-grade reliability standards. The substitute parts additionally carry ROHS3 compliance certification, providing environmental regulatory alignment.

Q: What is the significance of the different saturation current ratings?

A: Saturation current defines the maximum current before inductor core saturation causes inductance collapse. The main part saturates at 6.6 A, MPIA4020V2-3R3-R at 4 A, and ETQ-P3M3R3KVN at 11.5 A. Circuit designs operating near rated current must account for these differences to prevent performance degradation.

Q: Can ETQ-P3M3R3KVN be used in space-constrained applications?

A: No. The ETQ-P3M3R3KVN is physically larger (0.252" L x 0.236" W x 0.118" H) compared to the main part (0.175" L x 0.160" W x 0.071" H). Applications with strict size limitations should prioritize MPIA4020V2-3R3-R, which maintains closer dimensional compatibility.

Q: What is the operational temperature advantage of ETQ-P3M3R3KVN?

A: The ETQ-P3M3R3KVN operates to 155°C maximum, compared to 125°C for both the main part and MPIA4020V2-3R3-R. This 30°C additional margin provides thermal headroom in high-temperature environments, though the main part specifications remain adequate for standard -55°C to 125°C industrial applications.