MPIA4040R1-3R3-R Equivalent & Substitute Parts

Part Overview

The MPIA4040R1-3R3-R is a 3.3 µH shielded molded inductor manufactured by Eaton - Electronics Division. This component is rated for 2.2 A continuous current with a maximum DC resistance of 115mOhm and operates across the temperature range of -55°C to 125°C. The part carries AEC-Q200 automotive qualification and is currently classified as obsolete, necessitating identification of active equivalent alternatives for ongoing design support and procurement.

Substiute Parts

MPIA4040R1-3R3-R

Eaton - Electronics DivisionIn Stock: 1172MPIA4040R1-3R3-R Datasheet

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MPIA4015V2-3R3-R

Eaton - Electronics DivisionIn Stock: 12693MPIA4015V2-3R3-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 MPIA4040R1-3R3-R is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Inductance value: 3.3 µH with ±20% tolerance
• Shielding requirement: Shielded construction
• Surface mount configuration
• AEC-Q200 automotive qualification
• Moisture Sensitivity Level: 1 (Unlimited)
• Operating temperature range: Minimum -55°C to 125°C coverage

Secondary Compatibility Parameters:

• Current rating: Minimum 2.2 A continuous
• DC resistance: Acceptable within application thermal budget
• Physical footprint: Compatible with PCB layout constraints
• Saturation current: Adequate for circuit peak current demands

The three substitute parts listed below meet these criteria with variations in core material, package configuration, and DC resistance characteristics that remain within acceptable engineering tolerances for equivalent circuit performance.

Parameter Comparison

Engineering Selection Recommendations

MPIA4015V2-3R3-R (Eaton - Electronics Division)

This substitute is the primary equivalent from the same manufacturer. It maintains identical inductance, tolerance, and operating temperature range specifications. The MPIA4015V2-3R3-R offers improved current rating (3 A versus 2.2 A) and reduced DC resistance (92 mOhm versus 115 mOhm), resulting in lower thermal dissipation. The part is active in production with RoHS compliance certification. Physical dimensions are slightly larger (0.195" L x 0.165" W versus 0.175" L x 0.160" W), requiring PCB layout verification. This option is recommended for designs where the original MPIA4040R1-3R3-R footprint can accommodate the minor dimensional increase.

B82462G4332M000 (EPCOS - TDK Electronics)

This substitute provides the lowest DC resistance (31 mOhm maximum) among all alternatives, delivering superior thermal performance in current-limited applications. The ferrite drum core construction differs from the original metal composite molded design. The part is active with ROHS3 and REACH compliance. Operating temperature extends to 150°C. Physical dimensions are significantly larger (0.248" L x 0.248" W x 0.118" H), requiring substantial PCB layout modification. Selection of this part is appropriate only when thermal performance is the primary design driver and physical space permits the larger footprint.

SRP4012TA-3R3M (Bourns Inc.)

This substitute matches the original physical footprint exactly (0.175" L x 0.160" W x 0.047" H), enabling direct PCB layout compatibility. The carbonyl powder drum core construction provides a self-resonant frequency of 41 MHz and quality factor of 10 at 100 kHz. DC resistance (97 mOhm) is comparable to the original specification. The part is active with ROHS3 and REACH compliance. Operating temperature range extends to 150°C. This option is recommended for designs requiring identical PCB footprint with active product availability and extended temperature performance.

Frequently Asked Questions (FAQ)

Q: Can MPIA4015V2-3R3-R be used as a direct replacement for MPIA4040R1-3R3-R?

A: MPIA4015V2-3R3-R is functionally equivalent for inductance, tolerance, and operating temperature specifications. However, physical dimensions differ slightly (0.195" L x 0.165" W versus 0.175" L x 0.160" W). PCB layout verification is required to confirm the component fits within the allocated space. The improved current rating and reduced DC resistance make this a suitable upgrade where space permits.

Q: What are the key differences between molded and drum core inductor construction?

A: The MPIA4040R1-3R3-R uses molded metal composite core construction, while B82462G4332M000 and SRP4012TA-3R3M employ drum core wirewound designs. Molded inductors typically offer compact form factors and integrated shielding. Drum core inductors provide lower DC resistance and higher saturation current handling. Both construction types meet the specified 3.3 µH inductance and AEC-Q200 qualification.

Q: Is the B82462G4332M000 suitable for space-constrained applications?

A: No. The B82462G4332M000 has significantly larger dimensions (0.248" L x 0.248" W x 0.118" H) compared to the original part (0.175" L x 0.160" W x 0.047" H). This substitute is appropriate only for applications where thermal performance optimization justifies PCB layout redesign and increased board space allocation.

Q: Which substitute offers the best thermal performance?

A: B82462G4332M000 provides the lowest DC resistance at 31 mOhm maximum, resulting in minimal I²R losses and superior thermal performance. SRP4012TA-3R3M offers moderate thermal improvement (97 mOhm) while maintaining the original footprint. MPIA4015V2-3R3-R provides balanced thermal improvement (92 mOhm) with minimal dimensional change.

Q: Are all substitute parts AEC-Q200 qualified?

A: Yes. All three substitute parts carry AEC-Q200 automotive qualification, matching the original MPIA4040R1-3R3-R specification. This ensures compliance with automotive reliability and quality standards.

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

A: Metal composite (MPIA4040R1-3R3-R, MPIA4015V2-3R3-R), ferrite (B82462G4332M000), and carbonyl powder (SRP4012TA-3R3M) cores exhibit different frequency response characteristics and saturation behavior. All three materials support the specified 3.3 µH inductance and ±20% tolerance. Selection depends on application frequency range, saturation current requirements, and thermal constraints.

Q: Can SRP4012TA-3R3M be used as a direct PCB replacement?

A: Yes. SRP4012TA-3R3M matches the original footprint exactly (0.175" L x 0.160" W x 0.047" H), enabling direct PCB placement without layout modification. This part is recommended for applications requiring identical board-level compatibility with active product availability.

Q: What is the significance of MSL Level 1 (Unlimited) rating?

A: MSL Level 1 indicates unlimited shelf life without moisture bake-out requirements prior to soldering. All substitute parts carry this rating, matching the original specification and simplifying supply chain handling and storage procedures.

Q: How do saturation current ratings affect component selection?

A: Saturation current (Isat) defines the maximum current before inductance degrades significantly. The original part specifies 5.1 A Isat. Substitutes range from 2.1 A to 3.2 A. Applications requiring peak currents exceeding 3.2 A should verify circuit design compatibility or select the original part if available.