74405031100 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74405031100 is a 10 µH semi-shielded drum core wirewound inductor rated for 850 mA continuous current with a maximum DC resistance of 474 mOhm. This component is part of the WE-LQSH series and is actively manufactured. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for surface mount applications in the 3012 package footprint.

Key Parameters

Parameter	Value	Unit
Inductance	10	µH
Inductance Tolerance	±20%	-
Current Rating	850	mA
DC Resistance (Max)	474	mOhm
Saturation Current	1.45	A
Core Material	Ferrite	-
Shielding	Semi-Shielded	-
Operating Temperature Range	-40 to 125	°C
Mounting Type	Surface Mount	-
Package Footprint	3012 (Nonstandard)	-
Physical Dimensions	3.00 x 2.70 x 1.20	mm

Substitute Part Grouping Explanation

Substitution eligibility for the 74405031100 is determined by the following critical parameters:

Inductance Value: Must be 10 µH with ±20% tolerance
Current Rating: Minimum 850 mA continuous current capability
DC Resistance: Maximum 474 mOhm to maintain equivalent power dissipation characteristics
Core Material: Ferrite construction required
Shielding: Semi-shielded configuration
Operating Temperature: -40°C to 125°C range
Mounting: Surface mount technology
Package Compatibility: 3012 footprint or mechanically equivalent nonstandard package

The Eaton SDCL1V3012-100M-R meets the inductance, tolerance, core material, shielding, temperature range, and mounting requirements. However, the current rating of 500 mA and saturation current of 600 mA are below the 74405031100 specifications, making this substitute suitable only for applications where the actual circuit current does not exceed 500 mA.

Parameter Comparison

Parameter	74405031100 (Würth Elektronik)	SDCL1V3012-100M-R (Eaton)	Match Status
Inductance	10 µH	10 µH	Equivalent
Inductance Tolerance	±20%	±20%	Equivalent
Current Rating	850 mA	500 mA	Reduced
Saturation Current	1.45 A	600 mA	Reduced
DC Resistance (Max)	474 mOhm	345 mOhm	Better
Core Material	Ferrite	Ferrite	Equivalent
Shielding	Semi-Shielded	Semi-Shielded	Equivalent
Operating Temperature	-40 to 125°C	-40 to 125°C	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package Footprint	3012	3012	Equivalent
Physical Dimensions (L x W x H)	3.00 x 2.70 x 1.20 mm	3.00 x 3.00 x 1.30 mm	Compatible

Engineering Selection Recommendations

The 74405031100 is an active product with full RoHS3 compliance and REACH unaffected status. The Eaton SDCL1V3012-100M-R substitute maintains RoHS compliance and REACH unaffected status, ensuring regulatory alignment.

Selection between these components depends on circuit current requirements. The 74405031100 is specified for applications requiring 850 mA continuous current operation. The SDCL1V3012-100M-R is suitable for circuits where the maximum sustained current does not exceed 500 mA. Both components share identical inductance values, tolerance specifications, core materials, shielding configurations, and operating temperature ranges. The Eaton substitute exhibits lower DC resistance (345 mOhm versus 474 mOhm), which reduces power dissipation in current-limited applications.

Physical dimensions show minor height variation (1.20 mm versus 1.30 mm), which may require PCB layout verification for applications with strict height constraints.

Frequently Asked Questions (FAQ)

Q: Can the SDCL1V3012-100M-R replace the 74405031100 in all applications?

A: No. The SDCL1V3012-100M-R has a maximum current rating of 500 mA compared to the 74405031100's 850 mA rating. Substitution is valid only when the actual circuit current remains below 500 mA continuous operation.

Q: Are the inductance values identical?

A: Yes. Both components provide 10 µH inductance with ±20% tolerance, measured at their respective test frequencies (1 MHz for the 74405031100 and 100 kHz for the SDCL1V3012-100M-R).

Q: Do both parts fit the same PCB footprint?

A: Both components use the 3012 nonstandard package footprint. Physical dimensions are 3.00 x 2.70 x 1.20 mm (74405031100) and 3.00 x 3.00 x 1.30 mm (SDCL1V3012-100M-R). The width and height differences are minor and typically accommodate standard 3012 pad layouts, though PCB layout verification is recommended for height-constrained designs.

Q: What is the difference in DC resistance between these parts?

A: The 74405031100 has a maximum DC resistance of 474 mOhm, while the SDCL1V3012-100M-R has a maximum of 345 mOhm. Lower DC resistance in the Eaton part reduces resistive losses in low-current applications.

Q: Are both parts RoHS compliant?

A: Yes. The 74405031100 is RoHS3 compliant, and the SDCL1V3012-100M-R is RoHS compliant. Both are REACH unaffected.

Q: What is the saturation current difference?

A: The 74405031100 has a saturation current of 1.45 A, while the SDCL1V3012-100M-R saturates at 600 mA. This represents a significant difference in maximum current handling capability before inductance degradation occurs.

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