MPC1055L1R0C Equivalent & Substitute Parts

Part Overview

The MPC1055L1R0C is a 1 µH shielded inductor manufactured by KEMET, rated for 18.5 A continuous current with a maximum DC resistance of 2.3 mOhm. This component is designed for surface mount applications in a 2-SMD, J-Lead package configuration. The part is classified as "Not For New Designs," indicating it has been superseded in KEMET's product portfolio. Alternative equivalent parts are available from Eaton - Electronics Division that maintain the same inductance value and core electrical specifications while offering active product status and extended operating temperature ranges.

Substiute Parts

MPC1055L1R0C

KEMETIn Stock: 3004MPC1055L1R0C Datasheet

Current PartRFQ

DR125-1R0-R

Eaton - Electronics DivisionIn Stock: 1791DR125-1R0-R Datasheet

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DRA125-1R0-R

Eaton - Electronics DivisionIn Stock: 1072DRA125-1R0-R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MPC1055L1R0C are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

• Inductance value: 1 µH (exact match required)
• Inductance tolerance: ±20% (matching tolerance band)
• Shielding: Shielded configuration
• Mounting type: Surface Mount
• Core material: Ferrite-based construction
• Inductance test frequency: 100 kHz

Acceptable Variation Parameters:

• Current rating: Substitute parts must meet or exceed the 18.5 A requirement of the main part
• DC resistance: Substitute parts with DCR ≤ 2.3 mOhm are acceptable; lower DCR values represent improved performance
• Saturation current (Isat): Substitute parts must maintain saturation current ≥ 21 A
• Operating temperature range: Extended ranges are acceptable for applications within the original -20°C ~ 120°C specification
• Package configuration: Nonstandard packages are acceptable provided mechanical fit and electrical performance are maintained

The Eaton - Electronics Division parts DR125-1R0-R and DRA125-1R0-R meet these substitution criteria while offering active product status and enhanced specifications.

Parameter Comparison

Engineering Selection Recommendations

MPC1055L1R0C (KEMET): This part carries a "Not For New Designs" status, indicating it is obsolete or superseded. While 2,900 units are currently in stock, this part should not be selected for new circuit designs or long-term production applications.

DR125-1R0-R (Eaton - Electronics Division): This part is classified as Active and maintains full ROHS3 compliance with MSL 1 rating. The DR125-1R0-R provides a continuous current rating of 15 A, which is lower than the MPC1055L1R0C by 3.5 A. The saturation current of 23.6 A exceeds the original specification. The operating temperature range extends to 125°C, providing improved thermal performance. DC resistance of 2.4 mOhm is marginally higher than the original specification. This part is suitable for applications where the 15 A continuous current rating is sufficient.

DRA125-1R0-R (Eaton - Electronics Division): This part is classified as Active with full ROHS3 compliance and MSL 1 rating. The DRA125-1R0-R provides a continuous current rating of 15.94 A, which approaches the original 18.5 A specification more closely than the DR125-1R0-R. The saturation current of 23.71 A exceeds the original specification. The DC resistance of 2.1 mOhm is superior to the original 2.3 mOhm specification. The operating temperature range extends to 165°C, providing exceptional thermal performance. This part includes AEC-Q200 automotive qualification. The DRA125-1R0-R is the preferred substitute for applications requiring performance characteristics closest to the original MPC1055L1R0C.

Frequently Asked Questions (FAQ)

Q: Can the DR125-1R0-R or DRA125-1R0-R be used as direct replacements for the MPC1055L1R0C?

A: Both Eaton parts maintain the same 1 µH inductance value, ±20% tolerance, shielded configuration, and 100 kHz test frequency as the MPC1055L1R0C. Both are surface mount components with ferrite cores and meet ROHS3 compliance. The DRA125-1R0-R is the closer electrical match due to its 15.94 A current rating and superior 2.1 mOhm DCR. The DR125-1R0-R is suitable for applications where 15 A continuous current is acceptable.

Q: What is the primary difference between the DR125-1R0-R and DRA125-1R0-R?

A: The DRA125-1R0-R provides a higher continuous current rating (15.94 A versus 15 A), lower DC resistance (2.1 mOhm versus 2.4 mOhm), and an extended operating temperature range (-40°C ~ 165°C versus -40°C ~ 125°C). The DRA125-1R0-R also includes AEC-Q200 automotive qualification. Both parts have identical inductance, tolerance, and shielding specifications.

Q: Are there package compatibility concerns when substituting these parts?

A: The MPC1055L1R0C uses a 2-SMD, J-Lead package measuring 0.461" L x 0.394" W x 0.217" H. The Eaton substitutes use nonstandard packages measuring 0.492" L x 0.492" W x 0.236" H. Physical dimensions differ, requiring PCB layout verification before substitution. Mechanical fit and clearance must be confirmed for the specific application.

Q: Why is the MPC1055L1R0C marked "Not For New Designs"?

A: This designation indicates that KEMET has discontinued active development and support for this part number. Manufacturers typically apply this status when a product has been superseded by newer alternatives or when production is being phased out. New designs should utilize active product alternatives such as the Eaton DR125-1R0-R or DRA125-1R0-R.

Q: What is the significance of the AEC-Q200 rating on the DRA125-1R0-R?

A: AEC-Q200 is an automotive qualification standard that certifies component reliability under automotive operating conditions. The DRA125-1R0-R meets this qualification, making it suitable for automotive and high-reliability applications. The MPC1055L1R0C and DR125-1R0-R do not carry this certification.

Q: Can the DRA125-1R0-R be used in applications requiring the full 18.5 A rating of the MPC1055L1R0C?

A: The DRA125-1R0-R is rated for 15.94 A continuous current, which is 2.56 A below the original 18.5 A specification. Applications requiring the full 18.5 A continuous current cannot use the DRA125-1R0-R as a direct substitute. Circuit redesign or alternative component selection is required for such applications.

Q: Are all three parts RoHS compliant?

A: Yes. The MPC1055L1R0C, DR125-1R0-R, and DRA125-1R0-R are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings, indicating they meet current environmental and regulatory requirements.