Molex 0791077254 Equivalent & Substitute Parts

Part Overview

The Molex 0791077254 is a 10-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 with 792 units currently in stock. Alternative components may be required due to inventory constraints, application-specific performance requirements, or design optimization needs.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	10
Pitch - Mating	0.079" (2.00mm)
Number of Rows	2
Mounting Type	Through Hole
Contact Type	Female Socket
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. M22-7140542 qualifies as a substitute based on the following critical parameters:

Matching Parameters:

Connector type: Receptacle
Number of positions: 10
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 type: Female socket
Contact finish - mating: Gold
Insulation color: Black
Contact shape: Square
Contact material: Phosphor bronze
Style: Board to board or cable
RoHS status: ROHS3 compliant
MSL rating: 1 (Unlimited)
REACH status: REACH unaffected

Substitution is valid when the application requirements fall within the overlapping electrical and mechanical specifications of both components.

Parameter Comparison

Parameter	Molex 0791077254	Harwin M22-7140542
Manufacturer	Molex	Harwin Inc.
Series	Milli-Grid 79107	M22
Connector Type	Receptacle	Receptacle
Number of Positions	10	10
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 Type	Female Socket	Female Socket
Contact Finish - Mating	Gold	Gold
Insulation Color	Black	Black
Insulation Height	0.175" (4.45mm)	0.173" (4.40mm)
Contact Length - Post	0.075" (1.91mm)	0.094" (2.40mm)
Operating Temperature	-55°C ~ 125°C	-40°C ~ 105°C
Current Rating	1A	2A
Voltage Rating	125V	500VAC
Contact Shape	Square	Square
Contact Material	Phosphor Bronze	Phosphor Bronze
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
Inventory Status	792 Pcs In Stock	10214 Pcs In Stock

Engineering Selection Recommendations

Both the Molex 0791077254 and Harwin M22-7140542 are active production components with ROHS3 compliance and REACH unaffected status, making them suitable for regulated applications.

The Harwin M22-7140542 provides higher current capacity (2A versus 1A) and voltage rating (500VAC versus 125V), offering greater electrical headroom for applications requiring enhanced performance margins. The Harwin component also features UL94 V-0 material flammability rating, providing additional safety certification.

The Molex 0791077254 maintains a wider operating temperature range (-55°C to 125°C versus -40°C to 105°C), making it preferable for extreme low-temperature environments.

Both components share identical pitch, row configuration, mounting method, and contact geometry, ensuring mechanical and electrical compatibility at the mating interface.

Frequently Asked Questions (FAQ)

Q: Can the Harwin M22-7140542 directly replace the Molex 0791077254?

A: Yes, for applications within the overlapping electrical specifications. Both connectors share identical pitch (0.079"), row count (2), position count (10), mounting type (through hole), and contact configuration (female socket, gold-plated, square shape). Mechanical compatibility is assured. Electrical compatibility depends on application requirements; the Harwin component supports higher current (2A) and voltage (500VAC) ratings.

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

A: The primary differences are: operating temperature range (Molex: -55°C to 125°C; Harwin: -40°C to 105°C), current rating (Molex: 1A; Harwin: 2A), voltage rating (Molex: 125V; Harwin: 500VAC), insulation material (Molex: thermoplastic glass-filled; Harwin: liquid crystal polymer), and material flammability certification (Harwin: UL94 V-0). Contact post length also differs slightly (Molex: 0.075"; Harwin: 0.094").

Q: Are there any PCB layout considerations when substituting these parts?

A: Both connectors use identical pitch and row spacing, so PCB footprints are compatible. However, the slight difference in insulation height (Molex: 0.175"; Harwin: 0.173") and contact post length (Molex: 0.075"; Harwin: 0.094") should be verified against specific board design clearances and solder joint requirements.

Q: Which connector should I select for high-temperature applications?

A: The Molex 0791077254 supports operation to 125°C, compared to the Harwin M22-7140542 maximum of 105°C. For applications requiring sustained operation above 105°C, the Molex component is the appropriate choice.

Q: Are both connectors suitable for automotive applications?

A: The Molex 0791077254 lists automotive as an application category. The Harwin M22-7140542 lists general purpose, industrial, and telecommunications applications. Automotive-specific qualification should be verified against individual application requirements and OEM specifications.

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