MPI4040R1-R22-R Equivalent & Substitute Parts

Part Overview

The MPI4040R1-R22-R is a 230 nH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 5.5 A continuous current with an 18 mOhm DC resistance and operates across the temperature range of -55°C to 125°C. The part carries an obsolete product status, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

MPI4040R1-R22-R

Eaton - Electronics DivisionIn Stock: 1153MPI4040R1-R22-R Datasheet

Current PartRFQ

MPI4020V2-R22-R

Eaton - Electronics DivisionIn Stock: 8579MPI4020V2-R22-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPI4040R1-R22-R is based on the following critical parameters that define functional equivalence:

Inductance Value: The substitute part must operate within the ±20% tolerance band of the primary inductance specification. The MPI4040R1-R22-R specifies 230 nH; acceptable substitutes must fall within 184 nH to 276 nH.

Current Rating: The substitute must support the application's continuous current requirements. The primary part is rated for 5.5 A; substitutes with equal or higher current ratings maintain thermal and operational compatibility.

DC Resistance (DCR): Lower DCR values in substitute parts reduce power dissipation and heat generation, improving efficiency. The primary part specifies 18 mOhm maximum; substitutes with lower DCR provide performance benefits.

Saturation Current (Isat): The substitute must maintain adequate saturation current margin above the application's peak current demands to prevent core saturation and inductance collapse.

Core Type and Shielding: Both the primary and substitute parts utilize shielded drum core wirewound construction with metal composite cores, ensuring electromagnetic compatibility and mechanical consistency.

Operating Temperature Range: The substitute must support the full -55°C to 125°C operating window to ensure reliability across all environmental conditions.

Mounting and Package: Surface mount configuration and nonstandard package dimensions must be compatible with the PCB layout and assembly process.

Parameter Comparison

Engineering Selection Recommendations

The MPI4020V2-R22-R serves as a functional substitute for the obsolete MPI4040R1-R22-R based on the following engineering criteria:

Inductance Compatibility: The substitute's 220 nH inductance falls within the ±20% tolerance band of the primary part's 230 nH specification (acceptable range: 184–276 nH). This 10 nH difference is within tolerance and maintains circuit performance.

Current Handling: The MPI4020V2-R22-R provides a 9.5 A continuous current rating, exceeding the primary part's 5.5 A requirement. This provides additional thermal margin and operational headroom.

Resistance Advantage: The substitute's 6.6 mOhm maximum DCR represents a 63% reduction compared to the primary part's 18 mOhm specification. Lower resistance reduces power dissipation and improves efficiency in the application.

Saturation Current Consideration: The substitute's 12.5 A saturation current is lower than the primary part's 21 A. Applications operating near or above 12.5 A peak current require verification that saturation margin remains adequate.

Product Status and Compliance: The MPI4020V2-R22-R carries active product status with ROHS3 compliance and REACH unaffected designation, ensuring long-term availability and regulatory alignment.

Packaging and Availability: The substitute is supplied in Tape & Reel packaging with 8474 pieces in stock, compared to the primary part's obsolete status with limited remaining inventory.

Frequently Asked Questions (FAQ)

Q: Can the MPI4020V2-R22-R directly replace the MPI4040R1-R22-R in all applications?

A: The MPI4020V2-R22-R is functionally equivalent for applications where the continuous current requirement does not exceed 5.5 A and peak current remains below 12.5 A saturation current. The 220 nH inductance is within the ±20% tolerance of the 230 nH primary specification. Applications with higher current demands or saturation-sensitive designs require circuit analysis to confirm compatibility.

Q: What is the significance of the lower DC resistance in the substitute part?

A: The MPI4020V2-R22-R's 6.6 mOhm DCR compared to the primary part's 18 mOhm represents reduced resistive losses. This lower resistance decreases power dissipation, reduces heat generation, and improves overall circuit efficiency. For current-limited applications, this provides a performance advantage.

Q: Are there physical dimension differences between these parts?

A: Yes. The primary part measures 0.175" L × 0.160" W × 0.047" H (4.45mm × 4.06mm × 1.20mm). The substitute measures 0.160" L × 0.171" W × 0.079" H (4.06mm × 4.35mm × 2.00mm). The substitute is taller by 0.032" (0.80mm). PCB layout and component clearance must accommodate this height difference.

Q: What is the impact of the saturation current difference?

A: The primary part saturates at 21 A; the substitute at 12.5 A. Saturation causes inductance collapse and loss of filtering or energy storage function. Applications with peak currents approaching or exceeding 12.5 A require verification that the substitute maintains adequate saturation margin and circuit performance.

Q: Why is the substitute part listed as active while the primary is obsolete?

A: The MPI4040R1-R22-R is obsolete, indicating Eaton has discontinued production and support. The MPI4020V2-R22-R is an active product with ongoing manufacturing and availability. Substitution ensures access to a supported component with long-term supply continuity.

Q: Does the substitute meet current regulatory requirements?

A: The MPI4020V2-R22-R is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The primary part's compliance status is not specified. For applications requiring regulatory certification, the substitute's documented compliance provides assurance.

Q: How does packaging affect the substitution decision?

A: The primary part uses nonstandard packaging; the substitute is supplied in Tape & Reel (TR) format. TR packaging is standard for automated assembly and provides better handling and storage characteristics. Assembly process compatibility must be verified for your manufacturing environment.