Molex 0423760549 Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0423760549 is an active-status rectangular connector header designed for through-hole, right-angle mounting applications. This 4-position connector with 0.100" (2.54mm) pitch serves general-purpose, automotive, medical, and telecommunications applications. Finding equivalent substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate specific application requirements such as shrouding preferences, contact finish specifications, or fastening mechanism needs.

Substiute Parts

0423760549

MolexIn Stock: 11960423760549 Datasheet

Current PartRFQ

78208-104HLF

Amphenol ICC (FCI)In Stock: 152678208-104HLF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Molex 0423760549 is determined by strict alignment of the following core parameters:

• Pitch - Mating: 0.100" (2.54mm) — mandatory for mechanical and electrical compatibility
• Number of Positions: 4 — required for circuit connectivity
• Number of Rows: 1 — defines physical layout
• Contact Type: Male Pin — determines mating interface
• Mounting Type: Through Hole, Right Angle — specifies PCB integration method
• Termination: Solder — defines connection to PCB
• Material Flammability Rating: UL94 V-0 — ensures safety compliance

The Amphenol ICC (FCI) part number 78208-104HLF meets all mandatory substitution criteria. While this substitute introduces differences in shrouding (shrouded vs. unshrouded), fastening mechanism (friction lock vs. push-pull), contact finish (gold vs. tin), and insulation material (PCT vs. polyamide), these variations remain within acceptable engineering tolerances for equivalent functionality in the specified application categories.

Parameter Comparison

Engineering Selection Recommendations

Both the Molex 0423760549 and Amphenol ICC 78208-104HLF maintain active product status and comply with RoHS and UL94 V-0 flammability requirements. Selection between these parts should be based on application-specific requirements:

The Molex 0423760549 is suitable for applications requiring unshrouded headers with push-pull fastening and tin contact finish. The Amphenol ICC 78208-104HLF provides enhanced mechanical protection through 2-wall shrouding, friction-lock fastening, and gold contact finish, which may offer improved durability and contact reliability in demanding environments. Both parts share identical pitch, position count, row configuration, and mounting orientation, ensuring direct functional equivalence at the circuit interface level.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol ICC 78208-104HLF directly replace the Molex 0423760549 in existing designs?

A: Yes, at the electrical and mechanical interface level. Both connectors share identical pitch (0.100"), position count (4), row configuration (1), and through-hole right-angle mounting. However, physical layout differences—including shrouding height (0.203" vs. 0.090"), contact length (0.230" vs. 0.405"), and fastening mechanism (friction lock vs. push-pull)—require PCB layout verification and mating connector compatibility assessment.

Q: What are the key differences between these substitute parts?

A: Primary differences include shrouding configuration (unshrouded vs. 2-wall shrouded), fastening type (push-pull vs. friction lock), contact finish (tin vs. gold), insulation material (polyamide vs. PCT), and contact length specifications. These variations affect mechanical robustness, contact durability, and mating interface design but do not alter electrical functionality for the specified 4-position, 2.54mm pitch application.

Q: Are both parts suitable for automotive, medical, and telecommunications applications?

A: The Molex 0423760549 is explicitly rated for automotive, medical, general-purpose, and telecommunications applications. The Amphenol ICC 78208-104HLF maintains active status and RoHS compliance but does not specify application categories in the provided data. Both parts meet UL94 V-0 flammability requirements and MSL 1 moisture sensitivity specifications, supporting use in controlled industrial environments.

Q: What is the impact of contact finish differences on connector performance?

A: The Molex part features tin contact finish (100.0µin thickness), while the Amphenol ICC part offers gold or gold GXT™ finish (30.0µin thickness). Gold finishes typically provide superior corrosion resistance and contact reliability in high-reliability applications. Tin finishes are suitable for general-purpose applications with standard environmental protection. Selection depends on application-specific reliability and environmental exposure requirements.

Q: How do shrouding differences affect design implementation?

A: The Molex 0423760549 is unshrouded, offering minimal physical footprint and maximum accessibility. The Amphenol ICC 78208-104HLF features 2-wall shrouding, providing mechanical protection and keying slot functionality. Shrouded designs prevent accidental contact and misalignment but require larger PCB clearance. Design selection depends on space constraints, environmental protection needs, and mating connector availability.