MPIA4040R1-100-R Equivalent & Substitute Parts

Part Overview

The MPIA4040R1-100-R is a 10 µH shielded molded inductor manufactured by Eaton - Electronics Division. This component is rated for 1.2 A continuous current with a maximum DC resistance of 370 mOhm and operates across the temperature range of -55°C to 125°C. The part carries AEC-Q200 qualification and is mounted as a surface mount device in a nonstandard package measuring 4.45mm × 4.06mm × 1.20mm.

The MPIA4040R1-100-R is classified as obsolete. Locating equivalent or substitute components becomes necessary when original inventory is depleted or when design flexibility is required for procurement optimization. Substitute parts must maintain the specified inductance value of 10 µH at 100 kHz test frequency, operate within the required temperature range, and meet the shielding and current rating requirements of the application.

Key Parameters

Parameter	Value	Unit
Inductance	10	µH
Inductance Tolerance	±20	%
Current Rating	1.2	A
DC Resistance (DCR) Maximum	370	mOhm
Saturation Current (Isat)	2.8	A
Shielding	Shielded	—
Operating Temperature Range	-55 to 125	°C
Inductance Test Frequency	100	kHz
Mounting Type	Surface Mount	—
Moisture Sensitivity Level	1	—

Substitute Part Grouping Explanation

Substitution eligibility for the MPIA4040R1-100-R is determined by the following criteria:

Primary Matching Criteria:

Inductance value: 10 µH (fixed)
Inductance tolerance: ±20% (fixed)
Inductance test frequency: 100 kHz (fixed)
Shielding: Shielded (required)
Mounting type: Surface Mount (required)
Operating temperature range: Must encompass -55°C to 125°C minimum
Moisture sensitivity level: 1 (Unlimited)

Secondary Compatibility Criteria:

Current rating: Minimum 1.2 A (application dependent)
DC resistance: Maximum 370 mOhm (application dependent)
Saturation current: Minimum 2.8 A (application dependent)

All three substitute parts listed maintain the core inductance specification of 10 µH at ±20% tolerance and 100 kHz test frequency. All are shielded surface mount devices with MSL 1 rating. Variations in current rating, DC resistance, saturation current, core material, and package dimensions are documented in the parameter comparison table below.

Parameter Comparison

Parameter	MPIA4040R1-100-R (Main)	MPIA4015V2-100-R	74437321100	B82462G4103M000
Manufacturer	Eaton - Electronics Division	Eaton - Electronics Division	Würth Elektronik	EPCOS - TDK Electronics
Product Status	Obsolete	Active	Active	Active
Inductance (µH)	10	10	10	10
Inductance Tolerance	±20%	±20%	±20%	±20%
Current Rating (A)	1.2	1.8	1.2	1.5
Saturation Current - Isat (A)	2.8	2.1	2.2	1.3
DC Resistance Maximum (mOhm)	370	294	463	62
Shielding	Shielded	Shielded	Shielded	Shielded
Core Material	Metal Composite	Metal Composite	Iron Powder	Ferrite
Type	Molded	Molded	Molded	Drum Core, Wirewound
Operating Temperature Range (°C)	-55 to 125	-55 to 125	-40 to 125	-55 to 150
Inductance Test Frequency (kHz)	100	100	100	100
Self Resonant Frequency (MHz)	—	14	23	—
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	Nonstandard	2-SMD, J-Lead	2-SMD	Nonstandard
Size / Dimension (mm)	4.45 × 4.06	4.95 × 4.20	4.06 × 4.06	6.30 × 6.30
Height - Seated Maximum (mm)	1.20	1.50	1.20	3.00
Moisture Sensitivity Level	1	1	1	1
AEC-Q200 Rated	Yes	Yes	No	Yes
RoHS Status	—	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MPIA4015V2-100-R (Eaton - Electronics Division)

This substitute is an active product from the same manufacturer as the main part. It maintains identical inductance (10 µH ±20%), tolerance, test frequency, and operating temperature range (-55°C to 125°C). The MPIA4015V2-100-R offers improved current rating (1.8 A versus 1.2 A) and lower DC resistance (294 mOhm versus 370 mOhm), making it suitable for applications requiring better thermal performance. Both parts carry AEC-Q200 qualification. The substitute features a slightly larger footprint (4.95mm × 4.20mm versus 4.45mm × 4.06mm) and increased height (1.50mm versus 1.20mm). This option is recommended when PCB space permits and enhanced current handling is beneficial.

74437321100 (Würth Elektronik)

This substitute maintains the core inductance specification (10 µH ±20%) and test frequency (100 kHz). It matches the current rating of the main part (1.2 A) and provides identical height (1.20mm). The footprint is slightly smaller (4.06mm × 4.06mm). DC resistance is higher at 463 mOhm compared to 370 mOhm. The operating temperature range is -40°C to 125°C, which does not extend to the lower -55°C specification of the main part. This part is ROHS3 compliant and carries REACH Unaffected status. Selection of this substitute requires verification that the -40°C minimum temperature meets application requirements.

B82462G4103M000 (EPCOS - TDK Electronics)

This substitute maintains the 10 µH inductance at ±20% tolerance and 100 kHz test frequency. It offers the lowest DC resistance (62 mOhm) among all options, providing superior thermal characteristics. The part is rated for 1.5 A continuous current and carries AEC-Q200 qualification. Operating temperature range extends to -55°C to 150°C, exceeding the main part specification. However, the saturation current is lower (1.3 A versus 2.8 A), and the package is significantly larger (6.30mm × 6.30mm × 3.00mm). This option is suitable for applications where thermal performance and extended temperature range are critical, provided PCB layout accommodates the larger footprint.

Frequently Asked Questions (FAQ)

Q: Can MPIA4015V2-100-R be used as a direct replacement for MPIA4040R1-100-R?

A: MPIA4015V2-100-R is functionally compatible for applications requiring 10 µH inductance at 100 kHz with shielding and surface mount configuration. Both parts share identical inductance tolerance (±20%), operating temperature range (-55°C to 125°C), and AEC-Q200 qualification. The substitute offers higher current rating (1.8 A) and lower DC resistance (294 mOhm). Physical dimensions differ: the substitute is larger (4.95mm × 4.20mm × 1.50mm versus 4.45mm × 4.06mm × 1.20mm). PCB layout compatibility must be verified before substitution.

Q: What is the significance of DC resistance differences among these substitutes?

A: DC resistance directly affects power dissipation and thermal performance. The main part specifies 370 mOhm maximum. MPIA4015V2-100-R (294 mOhm) and B82462G4103M000 (62 mOhm) provide lower resistance, reducing heat generation. 74437321100 (463 mOhm) exhibits higher resistance. Selection depends on application thermal budget and current levels. Lower DC resistance is advantageous in high-current or thermally constrained applications.

Q: Why does 74437321100 have a lower minimum operating temperature?

A: 74437321100 specifies -40°C to 125°C operating range, compared to the main part's -55°C to 125°C. This reflects the design characteristics of the Würth Elektronik WE-LHMI series with iron powder core material. Applications requiring operation below -40°C must use alternative substitutes or the original part.

Q: How do core materials affect inductor performance?

A: The main part uses metal composite core material. Substitutes employ different materials: MPIA4015V2-100-R (metal composite), 74437321100 (iron powder), and B82462G4103M000 (ferrite). Core material influences saturation characteristics, frequency response, and thermal stability. All maintain the specified 10 µH inductance at 100 kHz test frequency. Application-specific frequency response requirements should be evaluated.

Q: Is package size a critical factor in substitution?

A: Package size becomes critical in space-constrained PCB layouts. The main part measures 4.45mm × 4.06mm × 1.20mm. MPIA4015V2-100-R is larger (4.95mm × 4.20mm × 1.50mm), 74437321100 is slightly smaller (4.06mm × 4.06mm × 1.20mm), and B82462G4103M000 is significantly larger (6.30mm × 6.30mm × 3.00mm). Verify PCB footprint availability and clearance requirements before selection.

Q: What does AEC-Q200 qualification indicate?

A: AEC-Q200 is an automotive electronics qualification standard. MPIA4040R1-100-R, MPIA4015V2-100-R, and B82462G4103M000 carry this certification, indicating compliance with automotive reliability and quality requirements. 74437321100 does not list AEC-Q200 qualification. Selection for automotive applications should prioritize AEC-Q200 qualified parts.

Q: Can saturation current differences affect circuit operation?

A: Saturation current (Isat) defines the current level at which inductance begins to degrade. The main part specifies 2.8 A Isat. MPIA4015V2-100-R (2.1 A), 74437321100 (2.2 A), and B82462G4103M000 (1.3 A) have lower saturation points. In applications with current transients or peak currents approaching these levels, inductor saturation may occur, reducing effective inductance. Circuit design must ensure operating currents remain below Isat specifications.

Q: What is the importance of moisture sensitivity level (MSL)?

A: All listed parts carry MSL 1 (Unlimited), indicating no moisture sensitivity. These components do not require special moisture control during storage, handling, or assembly. MSL 1 rating simplifies supply chain management and manufacturing processes compared to higher MSL ratings.

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