MPI4040R3-2R2-R Equivalent & Substitute Parts

Part Overview

The MPI4040R3-2R2-R is a 2.2 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 3.4 A continuous current with a DC resistance of 48 mOhm and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, necessitating identification of active equivalent components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

MPI4040R3-2R2-R

Eaton - Electronics DivisionIn Stock: 4742MPI4040R3-2R2-R Datasheet

Current PartRFQ

MPI4020V2-2R2-R

Eaton - Electronics DivisionIn Stock: 22014MPI4020V2-2R2-R Datasheet

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SRP4020TA-2R2M

Bourns Inc.In Stock: 19150SRP4020TA-2R2M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MPI4040R3-2R2-R are selected based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Primary Matching Parameters:

• Inductance value: 2.2 µH (exact match required)
• Inductance tolerance: ±20% (exact match required)
• Core type: Drum core, wirewound shielded construction
• Mounting type: Surface mount
• Inductance test frequency: 100 kHz

Secondary Compatibility Parameters:

• Current rating: Minimum 3.4 A (equal or higher acceptable)
• DC resistance: Nominal 48 mOhm (variations within component specifications acceptable)
• Operating temperature range: Minimum coverage of -55°C to 125°C
• Moisture sensitivity: MSL 1 or equivalent

Both substitute parts meet these criteria while offering active product status and improved availability compared to the obsolete MPI4040R3-2R2-R.

Parameter Comparison

Engineering Selection Recommendations

MPI4020V2-2R2-R (Eaton - Electronics Division)

This substitute maintains manufacturer continuity with the original MPI4040R3-2R2-R, both sourced from Eaton - Electronics Division. The MPI4020V2-2R2-R is active and widely available with 21,970 units in stock. It provides a current rating of 3.8 A, exceeding the 3.4 A requirement of the main part. The component is ROHS3 compliant and carries REACH unaffected status. Physical dimensions differ slightly (0.160" L x 0.171" W versus 0.175" L x 0.160" W), requiring PCB layout verification. The self-resonant frequency of 33 MHz is specified, providing additional design data not available for the main part.

SRP4020TA-2R2M (Bourns Inc.)

This substitute offers the highest current rating at 4 A and an extended operating temperature range of -40°C to 150°C. The SRP4020TA-2R2M maintains identical physical length (0.175") and width (0.160") to the main part, minimizing PCB layout modifications. The component carries AEC-Q200 automotive qualification and ROHS3 compliance. DC resistance is specified at 61 mOhm maximum, slightly higher than the main part's 48 mOhm. The self-resonant frequency of 45 MHz exceeds that of the MPI4020V2-2R2-R alternative. Core material differs (carbonyl powder versus metal composite), which may affect performance in specific electromagnetic environments.

Both substitutes are active products with established supply chains and full compliance certifications. Selection between them depends on specific application requirements regarding temperature range, physical footprint constraints, and core material compatibility.

Frequently Asked Questions (FAQ)

Q: Can the MPI4020V2-2R2-R directly replace the MPI4040R3-2R2-R without PCB modifications?

A: The MPI4020V2-2R2-R has slightly different physical dimensions (0.160" L x 0.171" W versus 0.175" L x 0.160" W). PCB layout verification is required to confirm pad spacing and component clearance compatibility. Height difference (0.079" versus 0.073") must also be evaluated for assembly clearance.

Q: What is the significance of the DC resistance difference between the main part and substitutes?

A: The MPI4040R3-2R2-R specifies 48 mOhm DCR. The MPI4020V2-2R2-R matches this at 48 Ohm Max, while the SRP4020TA-2R2M specifies 61 mOhm Max. Higher DCR results in increased power dissipation and heat generation. Applications sensitive to thermal performance or efficiency should account for this 13 mOhm difference in the Bourns component.

Q: Are there temperature range limitations when substituting with the SRP4020TA-2R2M?

A: The SRP4020TA-2R2M operates from -40°C to 150°C, which exceeds the original -55°C to 125°C range at the upper limit but does not extend to the lower -55°C specification. Applications requiring operation below -40°C must use the MPI4020V2-2R2-R, which maintains the full -55°C to 125°C range.

Q: What does the ±20% inductance tolerance mean for circuit design?

A: All three components share ±20% inductance tolerance. This means the actual inductance value can vary from 1.76 µH to 2.64 µH. Circuit designs must account for this tolerance range in filter response, impedance matching, and resonant frequency calculations.

Q: How do the different core materials affect electromagnetic performance?

A: The MPI4040R3-2R2-R and MPI4020V2-2R2-R use metal composite cores, while the SRP4020TA-2R2M uses carbonyl powder. Core material affects saturation characteristics, frequency response, and EMI performance. The SRP4020TA-2R2M specifies saturation current (Isat) of 6 A compared to 5.5 A for the MPI4020V2-2R2-R and 7.9 A for the main part. Applications with variable current loads should evaluate saturation behavior.

Q: What is the practical difference between the self-resonant frequencies specified for the substitutes?

A: The MPI4020V2-2R2-R has a self-resonant frequency of 33 MHz, while the SRP4020TA-2R2M specifies 45 MHz. Higher self-resonant frequency indicates better high-frequency performance and reduced parasitic capacitance effects. Applications operating near or above 30 MHz should prioritize the SRP4020TA-2R2M.

Q: Are both substitutes suitable for automotive applications?

A: The SRP4020TA-2R2M carries AEC-Q200 automotive qualification. The MPI4020V2-2R2-R does not specify automotive qualification. Automotive applications requiring AEC-Q200 compliance must use the SRP4020TA-2R2M.

Q: What packaging differences exist between these components?

A: The MPI4040R3-2R2-R uses nonstandard packaging. The MPI4020V2-2R2-R is supplied in Tape & Reel (TR) format. The SRP4020TA-2R2M is supplied in Cut Tape (CT) & Digi-Reel® format. Packaging selection affects procurement, handling, and assembly processes.