Molex 0791077257 Equivalent & Substitute Parts

Part Overview

The Molex 0791077257 is a 16-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 active in production and ROHS3 compliant, making it suitable for automotive, general purpose, and telecommunications applications. Equivalent parts may be required due to inventory constraints, design standardization across product lines, or specific performance requirements in operating temperature ranges or current ratings.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	16
Pitch - Mating	0.079" (2.00mm)
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Current Rating	1A
Voltage Rating	125V
Operating Temperature	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

The Harwin Inc. M22-7140842 is identified as a manufacturer-recommended substitute for the Molex 0791077257. Substitution eligibility is determined by the following critical parameters:

Matching Parameters:

Connector Type: Receptacle
Contact Type: Female Socket
Number of Positions: 16
Pitch - Mating: 0.079" (2.00mm)
Number of Rows: 2
Row Spacing - Mating: 0.079" (2.00mm)
Mounting Type: Through Hole
Termination: Solder
Fastening Type: Push-Pull
Contact Finish - Mating: Gold
Contact Material: Phosphor Bronze
Insulation Color: Black

These parameters ensure mechanical and electrical compatibility for direct substitution in board-to-board or cable connection applications.

Parameter Comparison

Parameter	Molex 0791077257	Harwin M22-7140842
Manufacturer	Molex	Harwin Inc.
Series	Milli-Grid 79107	M22
Connector Type	Receptacle	Receptacle
Contact Type	Female Socket	Female Socket
Number of Positions	16	16
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Number of Rows	2	2
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold
Contact Finish - Post	Tin	Tin
Insulation Color	Black	Black
Contact Material	Phosphor Bronze	Phosphor Bronze
Current Rating	1A	2A
Voltage Rating	125V	500VAC
Operating Temperature	-55°C ~ 125°C	-40°C ~ 105°C
Insulation Material	Thermoplastic, Glass Filled	Liquid Crystal Polymer (LCP)
Material Flammability Rating	-	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active

Engineering Selection Recommendations

Both the Molex 0791077257 and Harwin M22-7140842 are active production parts with ROHS3 compliance and MSL 1 rating, indicating equivalent environmental and regulatory standing. The Harwin substitute provides higher current capacity (2A versus 1A) and voltage rating (500VAC versus 125V), making it suitable for applications requiring greater electrical performance margins. The Harwin part features UL94 V-0 flammability certification, whereas the Molex part does not specify a flammability rating. The Harwin M22-7140842 uses Liquid Crystal Polymer insulation compared to the Molex thermoplastic glass-filled material, offering improved dimensional stability and thermal performance. Selection between these parts should be based on application-specific electrical requirements and environmental certifications needed for the end application.

Frequently Asked Questions (FAQ)

Q: Can the Harwin M22-7140842 be used as a direct replacement for the Molex 0791077257?

A: Yes. Both connectors share identical mechanical and mating specifications: 16 positions, 0.079" (2.00mm) pitch, 2-row configuration, through-hole mounting, push-pull fastening, and gold-plated mating contacts. Physical and electrical compatibility is established through these matching parameters.

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

A: The primary differences are current rating (Harwin 2A versus Molex 1A), voltage rating (Harwin 500VAC versus Molex 125V), operating temperature range (Molex -55°C to 125°C versus Harwin -40°C to 105°C), insulation material (Harwin LCP versus Molex thermoplastic glass-filled), and flammability certification (Harwin UL94 V-0 versus Molex unspecified).

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

A: The Molex 0791077257 supports operation to 125°C, exceeding the Harwin M22-7140842 maximum of 105°C. For applications requiring sustained operation above 105°C, the Molex part is the appropriate choice.

Q: Are both parts suitable for automotive applications?

A: The Molex 0791077257 is explicitly listed for automotive applications. The Harwin M22-7140842 is specified for general purpose, industrial, and telecommunications applications. Application suitability should be confirmed against specific automotive qualification requirements.

Q: What is the packaging difference between these parts?

A: The Molex 0791077257 packaging is not specified in available data. The Harwin M22-7140842 is supplied in tube packaging.

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