Molex 0449142003 Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0449142003 is a Micro-Fit 3.0 CPI rectangular connector header designed for through-hole board-to-board or cable applications. This connector features a 20-position, 2-row configuration with 0.118" (3.00mm) pitch and shrouded 4-wall design. The part is classified as obsolete, making identification of active equivalent components essential for ongoing production and maintenance applications across general purpose, medical, military, and telecommunications sectors.

Substiute Parts

0449142003

MolexIn Stock: 11360449142003 Datasheet

Current PartRFQ

0449147003

MolexIn Stock: 9250449147003 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Molex 0449142003 is determined by strict equivalence across the following critical parameters:

• Connector type, contact type, and gender (Header, Male Pin)
• Position count and row configuration (20 positions, 2 rows)
• Mating pitch and row spacing (0.118" / 3.00mm)
• Mounting method (Through Hole)
• Shrouding design (Shrouded - 4 Wall)
• Termination capability (Press-Fit, Solder)
• Insulation and contact materials
• Flammability compliance (UL94 V-0)

The substitute part Molex 0449147003 maintains identical electrical and mechanical specifications across all these parameters, differing only in packaging format and regulatory compliance status. Both components belong to the same Micro-Fit 3.0 CPI 44914 series and are fully interchangeable at the functional level.

Parameter Comparison

Engineering Selection Recommendations

The Molex 0449147003 is the direct functional equivalent of the obsolete 0449142003. Selection of the substitute part is based on the following engineering criteria:

Product Status: The 0449147003 maintains active product status, ensuring continued availability and manufacturer support, whereas the 0449142003 is classified as obsolete.

Regulatory Compliance: The 0449147003 is ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production. The 0449142003 is RoHS non-compliant, presenting compliance risks for applications subject to RoHS directives.

Electrical and Mechanical Equivalence: Both parts share identical specifications across all functional parameters including connector geometry, contact configuration, pitch, mounting method, and material properties. This ensures direct interchangeability without circuit or mechanical redesign.

Contact Finish Specification: The substitute part features tin-plated post contacts with 100.0µin (2.54µm) thickness, compared to the main part's tin-lead plating at 60.0µin (1.52µm). Both finishes are compatible with standard solder processes and provide equivalent electrical performance.

For applications requiring the Micro-Fit 3.0 CPI 44914 series 20-position header with 3.00mm pitch and through-hole mounting, the 0449147003 is the appropriate selection for new production and replacement inventory.

Frequently Asked Questions (FAQ)

Q: Are the 0449142003 and 0449147003 mechanically interchangeable?

A: Yes. Both connectors share identical mechanical specifications including position count (20), row configuration (2 rows), mating pitch (0.118" / 3.00mm), row spacing (0.118" / 3.00mm), mounting type (through-hole), shrouding design (4-wall), and insulation dimensions. They are direct mechanical equivalents.

Q: What is the difference in contact finish between these parts?

A: The 0449142003 features tin-lead plated posts at 60.0µin (1.52µm) thickness. The 0449147003 features tin-plated posts at 100.0µin (2.54µm) thickness. Both finishes are compatible with standard solder processes and provide equivalent electrical performance for the specified applications.

Q: Why is the 0449142003 classified as obsolete?

A: The 0449142003 is no longer in active production. The 0449147003 serves as the current production equivalent within the Micro-Fit 3.0 CPI 44914 series.

Q: Does the packaging difference affect compatibility?

A: No. The 0449142003 packaging is unspecified, while the 0449147003 is supplied in tray packaging. Packaging format does not affect the electrical or mechanical performance of the connector itself. Selection should be based on inventory handling and assembly process requirements.

Q: Is the 0449147003 suitable for medical and military applications?

A: Yes. The 0449147003 is rated for general purpose, medical, military, and telecommunications applications, matching the application scope of the 0449142003. Both parts meet UL94 V-0 flammability requirements.

Q: What is the RoHS compliance status of the substitute part?

A: The 0449147003 is ROHS3 compliant. For applications subject to RoHS directives, the 0449147003 is the appropriate selection. The 0449142003 is RoHS non-compliant and should not be used in new designs requiring RoHS compliance.

Q: Can the 0449147003 be used as a direct replacement in existing assemblies?

A: Yes. The 0449147003 is functionally and mechanically equivalent to the 0449142003 across all specified parameters. Direct substitution is supported without circuit or mechanical modification.