Molex 0449140403 Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0449140403 is a Micro-Fit 3.0 CPI 44914 series rectangular connector header designed for through-hole mounting in board-to-board or cable applications. This connector features a 4-position, 2-row configuration with 0.118" (3.00mm) pitch and shrouded 4-wall design. The part is currently classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure supply chain availability for new production and field service applications.

Substiute Parts

0449140403

MolexIn Stock: 11560449140403 Datasheet

Current PartRFQ

0449145403

MolexIn Stock: 89590449145403 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Molex 0449140403 with the Molex 0449145403 is based on strict equivalence of the following critical parameters:

• Connector type, contact type, and gender (Header, Male Pin)
• Position count and row configuration (4 positions, 2 rows)
• Mating pitch and row spacing (0.118" / 3.00mm)
• Mounting method and termination style (Through Hole, Press-Fit/Solder)
• Shrouding design and fastening mechanism (Shrouded 4-Wall, Locking Ramp)
• Insulation material and contact material composition
• Flammability certification (UL94 V-0)
• Series designation (Micro-Fit 3.0 CPI 44914)

Both parts maintain identical mechanical and electrical interface specifications, ensuring direct functional compatibility in applications designed for the original component.

Parameter Comparison

Engineering Selection Recommendations

The Molex 0449145403 is the direct active equivalent for the obsolete Molex 0449140403. Both components share identical mechanical and electrical interface specifications within the Micro-Fit 3.0 CPI 44914 series.

The primary distinction between these parts is product lifecycle status: the 0449140403 is obsolete, while the 0449145403 is active and currently in production. The 0449145403 offers improved regulatory compliance, meeting ROHS3 requirements compared to the non-compliant status of the original part.

Minor variations exist in post-contact finish specifications: the substitute features tin plating with increased thickness (100.0µin / 2.54µm) versus the original tin-lead plating (60.0µin / 1.52µm). These differences do not affect functional compatibility or electrical performance in standard applications.

The substitute part is supplied in tray packaging, whereas packaging information for the original part is not specified. Both components maintain identical moisture sensitivity levels and REACH/ECCN classifications.

Frequently Asked Questions (FAQ)

Q: Are the Molex 0449140403 and 0449145403 mechanically interchangeable?

A: Yes. Both connectors share identical pitch (0.118" / 3.00mm), row spacing, position count (4 positions, 2 rows), mounting type (through-hole), shrouding design (4-wall), and fastening mechanism (locking ramp). They are direct mechanical equivalents.

Q: What is the primary reason for substitution?

A: The 0449140403 is classified as obsolete. The 0449145403 is the active production equivalent, ensuring continued supply chain availability and manufacturing support.

Q: Does the contact finish difference affect compatibility?

A: No. The post-contact finish variation (tin-lead versus tin, with different thickness specifications) does not impact electrical or mechanical interface compatibility. Both finishes are suitable for solder termination applications.

Q: Is the substitute RoHS compliant?

A: The 0449145403 meets ROHS3 compliance requirements, whereas the original 0449140403 is RoHS non-compliant. This represents an improvement in regulatory alignment for new designs and production.

Q: Does packaging differ between these parts?

A: The 0449145403 is supplied in tray packaging. Packaging information for the 0449140403 is not specified in available documentation.

Q: Are both parts suitable for medical and military applications?

A: Yes. Both the 0449140403 and 0449145403 are listed for general purpose, medical, military, and telecommunications applications. Both maintain UL94 V-0 flammability certification and MSL 1 (unlimited) moisture sensitivity ratings.