Molex 0791077255 Equivalent & Substitute Parts

Part Overview

The Molex 0791077255 is a 12-position receptacle connector from the Milli-Grid 79107 series, designed for board-to-board or cable applications. This through-hole mounted connector features 0.079" (2.00mm) pitch mating contacts with gold plating and is rated for 1A at 125V. The part is currently active in production with 920 units in stock. Alternative components may be required due to inventory constraints, application-specific performance requirements, or design optimization needs.

Substiute Parts

0791077255

MolexIn Stock: 9480791077255 Datasheet

Current PartRFQ

M22-7140642

Harwin Inc.In Stock: 1164M22-7140642 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Harwin Inc. M22-7140642 is identified as a manufacturer-recommended substitute for the Molex 0791077255. Substitution eligibility is determined by the following critical parameters:

Matching Parameters:

• Connector type: Receptacle
• Number of positions: 12
• Pitch - mating: 0.079" (2.00mm)
• Number of rows: 2
• Row spacing - mating: 0.079" (2.00mm)
• Mounting type: Through hole
• Contact type: Female socket
• Termination: Solder
• Fastening type: Push-pull
• Contact finish - mating: Gold
• Insulation color: Black
• Contact shape: Square
• Contact material: Phosphor bronze
• RoHS status: ROHS3 compliant
• MSL rating: 1 (Unlimited)

These parameters ensure mechanical and electrical compatibility for direct substitution in applications where the original part is unavailable.

Parameter Comparison

Engineering Selection Recommendations

Both the Molex 0791077255 and Harwin M22-7140642 are active products with ROHS3 compliance and unlimited moisture sensitivity ratings, making them suitable for production environments. The Harwin substitute provides enhanced electrical performance with 2A current rating and 500VAC voltage rating compared to the Molex original specification of 1A at 125V. The Harwin part features a longer contact post (0.094" vs 0.075") and operates across a narrower temperature range (-40°C to 105°C vs -55°C to 125°C). Selection between these parts should be based on specific application requirements regarding current capacity, voltage tolerance, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the Harwin M22-7140642 be used as a direct replacement for the Molex 0791077255?

A: Yes, the Harwin M22-7140642 is mechanically and electrically compatible for direct substitution. Both connectors share identical pitch (0.079"), position count (12), row configuration (2 rows), mounting type (through hole), and contact finish (gold). The substitute meets or exceeds the original part's electrical specifications.

Q: What are the key differences between these two connectors?

A: The primary differences are: (1) Current rating: Harwin provides 2A versus Molex 1A; (2) Voltage rating: Harwin rated for 500VAC versus Molex 125V; (3) Operating temperature range: Molex supports -55°C to 125°C while Harwin supports -40°C to 105°C; (4) Contact post length: Harwin 0.094" versus Molex 0.075"; (5) Insulation material: Molex uses thermoplastic glass-filled material while Harwin uses liquid crystal polymer (LCP).

Q: Are there any compatibility concerns with PCB layout or footprint?

A: The connectors share identical mating pitch and row spacing, ensuring PCB footprint compatibility. Minor dimensional variations in insulation height (0.175" vs 0.173") and contact post length (0.075" vs 0.094") are within typical manufacturing tolerances and do not affect board-level compatibility.

Q: Which part should be selected for high-current applications?

A: The Harwin M22-7140642 is suitable for applications requiring higher current capacity, rated at 2A compared to the Molex original 1A rating.

Q: Are both parts compliant with environmental and regulatory standards?

A: Yes, both the Molex 0791077255 and Harwin M22-7140642 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.