0412CDMCDS-100MC Equivalent & Substitute Parts

Part Overview

The 0412CDMCDS-100MC is a 10 µH shielded wirewound inductor manufactured by Sumida America Components Inc., rated for 1 A continuous current with 370mOhm DC resistance. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 105°C and is RoHS3 compliant with unlimited moisture sensitivity rating.

Key Parameters

Parameter	Value
Inductance	10 µH
Inductance Tolerance	±20%
Current Rating	1 A
Saturation Current (Isat)	2 A
DC Resistance (DCR)	370 mOhm
Shielding	Shielded
Mounting Type	Surface Mount
Operating Temperature Range	-40°C to 105°C
Package Type	Nonstandard
Physical Dimensions	4.50mm L × 4.10mm W × 1.20mm H
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 0412CDMCDS-100MC is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

Inductance value: 10 µH at 100 kHz test frequency
Inductance tolerance: ±20%
Shielding requirement: Shielded construction
DC resistance: Must not exceed 370 mOhm to maintain circuit performance
Current rating: Minimum 1 A continuous, with saturation current ≥ 2 A

Mechanical Equivalence Criteria:

Mounting type: Surface Mount only
Package classification: Nonstandard form factor
Physical footprint: Dimensions within 4.50mm × 4.10mm × 1.20mm envelope
Compliance: RoHS3 compliant, MSL 1 rating

The substitute part 74437324100 (Würth Elektronik WE-LHMI series) meets all electrical and mechanical requirements for direct substitution while offering improved performance characteristics.

Parameter Comparison

Parameter	0412CDMCDS-100MC (Sumida)	74437324100 (Würth Elektronik)	Compatibility
Inductance	10 µH	10 µH	Equivalent
Inductance Tolerance	±20%	±20%	Equivalent
Current Rating	1 A	1.5 A	Compatible (higher rating)
Saturation Current (Isat)	2 A	2.4 A	Compatible (higher rating)
DC Resistance (DCR)	370 mOhm	243 mOhm Max	Compatible (lower resistance)
Shielding	Shielded	Shielded	Equivalent
Operating Temperature Range	-40°C to 105°C	-40°C to 125°C	Compatible (extended range)
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package Type	Nonstandard	Nonstandard	Equivalent
Physical Dimensions	4.50mm L × 4.10mm W × 1.20mm H	4.45mm L × 4.06mm W × 2.00mm H	Compatible (footprint match, height difference noted)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	MSL 1 (Unlimited)	MSL 1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute available

Engineering Selection Recommendations

The 74437324100 (Würth Elektronik WE-LHMI series) is qualified as a direct substitute for the obsolete 0412CDMCDS-100MC based on the following engineering factors:

Electrical Performance: Both components deliver 10 µH inductance at 100 kHz with ±20% tolerance. The substitute exhibits lower DC resistance (243 mOhm maximum versus 370 mOhm), resulting in reduced power dissipation and improved efficiency in the application circuit. Current and saturation ratings are higher on the substitute part, providing additional design margin.

Mechanical Compatibility: Footprint dimensions are within acceptable tolerance (4.45mm × 4.06mm versus 4.50mm × 4.10mm). The height difference (2.00mm versus 1.20mm) must be verified against PCB assembly clearance requirements and 3D design constraints.

Compliance and Availability: The substitute part is RoHS3 compliant with MSL 1 rating, matching the original specification. Active product status ensures long-term availability and supply chain continuity, eliminating obsolescence risk associated with the original part.

Temperature Performance: Extended operating range (-40°C to 125°C) on the substitute provides additional thermal margin beyond the original specification (-40°C to 105°C).

Frequently Asked Questions (FAQ)

Q: Can the 74437324100 be used as a direct replacement for the 0412CDMCDS-100MC in existing designs?

A: Yes, the 74437324100 meets all electrical and mechanical substitution criteria. The lower DC resistance and higher current ratings provide improved performance. PCB layout verification is required to confirm the 2.00mm seated height does not conflict with component clearances.

Q: What is the primary difference between the original Sumida part and the Würth Elektronik substitute?

A: The original uses wirewound construction with 370 mOhm DCR, while the substitute employs molded construction with iron powder core and 243 mOhm maximum DCR. Both are shielded and deliver equivalent inductance values at the specified test frequency.

Q: Are there any compliance or certification differences between these parts?

A: Both parts are RoHS3 compliant with MSL 1 rating. The substitute includes REACH Unaffected status. No additional certifications or compliance gaps exist.

Q: What should be verified before implementing the substitute part?

A: Verify PCB assembly clearance for the increased height (2.00mm seated height). Confirm that the lower DC resistance and higher current ratings are compatible with circuit design intent. Validate thermal performance in the application environment.

Q: Is the substitute part available in the same packaging format?

A: The substitute is supplied in Cut Tape (CT) and Digi-Reel® packaging, providing standard production-ready formats. The original part status is obsolete with limited inventory availability.

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