Equivalent & Substitute Parts for 0412CDMCDS-3R3MC

Part Overview

The 0412CDMCDS-3R3MC is a 3.3 µH shielded wirewound inductor manufactured by Sumida America Components Inc., rated for 1.8 A continuous current with 115mOhm DC resistance. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives 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.

Substiute Parts

0412CDMCDS-3R3MC

Sumida America Components Inc.In Stock: 8110412CDMCDS-3R3MC Datasheet

Current PartRFQ

74437324033

Würth ElektronikIn Stock: 130074437324033 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0412CDMCDS-3R3MC is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Inductance value: 3.3 µH at 100 kHz test frequency
• Inductance tolerance: ±20%
• Shielding classification: Shielded
• Mounting technology: Surface Mount
• Package footprint compatibility: Nonstandard 4.50mm × 4.10mm form factor

Performance Compatibility Criteria:

• Current rating must equal or exceed 1.8 A continuous
• Saturation current (Isat) must equal or exceed 3.7 A
• DC resistance must not exceed 115mOhm (lower values acceptable)
• Operating temperature range must encompass -40°C to 105°C minimum

Compliance Requirements:

• RoHS3 compliance mandatory
• Moisture Sensitivity Level 1 (Unlimited) acceptable

The substitute part 74437324033 from Würth Elektronik satisfies all mandatory and performance criteria, with enhanced specifications in current rating and reduced DC resistance.

Parameter Comparison

Engineering Selection Recommendations

The 74437324033 (Würth Elektronik WE-LHMI series) is a direct functional substitute for the obsolete 0412CDMCDS-3R3MC. Selection is based on the following engineering factors:

Compliance & Availability: The substitute part maintains ROHS3 compliance and is actively manufactured, ensuring long-term procurement availability. The original part is obsolete, making substitution necessary for production continuity.

Electrical Performance: The substitute meets or exceeds all electrical requirements: inductance value and tolerance are identical, current rating increases from 1.8 A to 2.5 A, saturation current increases from 3.7 A to 4.2 A, and DC resistance decreases from 115mOhm to 76mOhm maximum. These improvements provide enhanced thermal performance and reduced power dissipation in the application circuit.

Thermal Capability: Operating temperature range extends from -40°C to 125°C, exceeding the original specification of -40°C to 105°C. This provides additional margin for industrial and automotive applications.

Physical Considerations: Footprint dimensions are functionally equivalent (4.45 × 4.06 mm versus 4.50 × 4.10 mm). However, the substitute height increases from 1.20 mm to 2.00 mm seated maximum. PCB layout clearance verification is required before implementation.

Packaging: The substitute is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. Moisture sensitivity remains at Level 1 (Unlimited), matching the original specification.

Frequently Asked Questions (FAQ)

Q: Can the 74437324033 be used as a direct replacement for 0412CDMCDS-3R3MC without circuit modification?

A: Yes, from an electrical standpoint. The inductance value, tolerance, and test frequency are identical. However, the increased height (2.00 mm versus 1.20 mm) requires verification of PCB clearance and component placement constraints. No circuit design changes are necessary.

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

A: The substitute's 76mOhm maximum DC resistance compared to the original 115mOhm reduces resistive losses and heat generation during operation. This improves efficiency and thermal performance, particularly in high-current applications approaching the 1.8 A rating.

Q: Why does the substitute have a higher current rating and saturation current?

A: The 74437324033 uses molded construction with iron powder core material, compared to the wirewound design of the original. This construction method enables higher current handling capability (2.5 A versus 1.8 A) and higher saturation current (4.2 A versus 3.7 A) while maintaining the same inductance value and footprint compatibility.

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

A: Both parts are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited). The substitute includes REACH Unaffected status. Both are classified under ECCN EAR99 for export control purposes. No compliance barriers exist for substitution.

Q: What is the impact of the extended operating temperature range (-40 to 125°C versus -40 to 105°C)?

A: The substitute's extended upper temperature limit provides additional thermal margin for applications operating in elevated ambient conditions or with high component density. This does not affect substitution suitability; it represents an improvement in capability.

Q: How should the height difference be managed in PCB design?

A: The 0.80 mm height increase (from 1.20 mm to 2.00 mm) must be evaluated against PCB stackup, component placement density, and any height-constrained enclosures. Verify clearance to adjacent components and shielding structures before finalizing the design layout.

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

A: The substitute is supplied in Tape & Reel (TR) packaging, standard for automated assembly. The original part packaging format is not specified in the provided data. Confirm packaging compatibility with your assembly process requirements.