Molex 0791070019 Equivalent & Substitute Parts

Part Overview

The Molex 0791070019 is a 40-position receptacle connector with 0.079" (2.00mm) pitch, designed for through-hole solder termination in board-to-board or cable applications. This connector belongs to the Milli-Grid 79107 series and features gold-plated mating contacts with tin-lead post finish. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility across pitch, position count, voltage, and current ratings while accommodating mechanical form factor variations.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	40
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
Contact Material	Phosphor Bronze
Insulation Material	Thermoplastic, Glass Filled

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict electrical and mechanical compatibility criteria. All substitute parts must maintain the following core parameters identical to the main part:

40-position configuration with 2-row layout
0.079" (2.00mm) mating pitch and row spacing
Through-hole solder termination
Push-pull fastening mechanism
Gold-plated mating contacts
Square contact geometry
Phosphor bronze contact material
Black insulation color

Acceptable variations within substitute parts include:

Contact finish thickness on mating surfaces (10.0µin to 30.0µin)
Post contact finish (tin or gold acceptable)
Insulation height tolerance (0.173" to 0.177")
Contact length post variation (0.094" to 0.118")
Operating temperature range (minimum -40°C, maximum 105°C or higher)
Current rating (1A minimum; higher ratings acceptable)
Voltage rating (125V minimum; higher ratings acceptable)
Insulation material composition (thermoplastic, glass-filled, LCP, or PCT acceptable)
Flammability rating (UL94 V-0 acceptable)
RoHS compliance status

Substitute parts with reduced position loading (39 of 40 positions) are not electrically equivalent and require application-specific validation.

Parameter Comparison

Parameter	0791070019 (Main)	0791077019 (Molex)	150240-6002-RB (3M)	4-1734506-3 (TE)	63453-140LF (Amphenol)	M22-7142042 (Harwin)	MMS-120-01-F-DV (Samtec)
Connector Type	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle
Number of Positions	40	40	40	40	40	40	40
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Number of Rows	2	2	2	2	2	2	2
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Contact Finish Thickness - Mating	15.0µin (0.38µm)	15.0µin (0.38µm)	30.0µin (0.76µm)	10.0µin (0.25µm)	30.0µin (0.76µm)	Not specified	3.00µin (0.076µm)
Insulation Height	0.175" (4.45mm)	0.175" (4.45mm)	0.177" (4.50mm)	0.177" (4.50mm)	0.177" (4.50mm)	0.173" (4.40mm)	0.175" (4.45mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)	0.100" (2.54mm)	0.102" (2.60mm)	0.098" (2.50mm)	0.094" (2.40mm)	0.115" (2.92mm)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 125°C	-40°C ~ 105°C	-55°C ~ 125°C
Contact Material	Phosphor Bronze	Phosphor Bronze	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin	Tin	Tin
Current Rating	1A	1A	1A	Not specified	2A	2A	3.9A per Contact
Voltage Rating	125V	125V	500VDC	250VAC	200V	500VAC	Not specified
Insulation Material	Thermoplastic, Glass Filled	Thermoplastic, Glass Filled	Thermoplastic	Thermoplastic	PCT, Glass Filled	LCP	LCP
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitute: Molex 0791077019

The Molex 0791077019 is the direct successor to the obsolete 0791070019 within the same Milli-Grid 79107 series. It maintains identical electrical and mechanical specifications with the exception of post contact finish (tin instead of tin-lead) and RoHS3 compliance. This part offers the highest compatibility with existing designs and PCB layouts. With 10,776 units in stock, supply continuity is assured.

Secondary Substitutes for RoHS-Compliant Applications:

The TE Connectivity 4-1734506-3 (AMPMODU series) and Amphenol ICC 63453-140LF (Minitek 2.00mm series) provide full electrical equivalence with enhanced current ratings (2A and 3.9A respectively) and RoHS compliance. Both maintain the 40-position, 2.00mm pitch configuration with through-hole solder termination. The Amphenol part offers superior temperature range (-55°C to 125°C) matching the original specification.

Alternative for Extended Voltage Requirements:

The 3M 150240-6002-RB (1502 series) supports 500VDC operation, exceeding the original 125V rating. This part is suitable for applications requiring higher voltage isolation. Contact length variation (0.100" vs. 0.118") requires PCB footprint validation.

Samtec MMS Series Options:

The Samtec MMS-120-01-F-DV and related variants (MMS-120-01-H-DV, MMS-120-01-L-DV series) provide the highest current capacity (3.9A per contact) with LCP insulation material. These parts are suitable for high-reliability applications. Note that MMS-120-01-L-DV variants feature 39-position loading and require application-specific compatibility assessment.

Harwin M22-7142042:

The Harwin M22-7142042 (M22 series) offers 500VAC operation with 2A current rating and LCP insulation. Operating temperature range (-40°C to 105°C) is reduced compared to the original specification. This part is suitable for industrial and telecommunications applications where the reduced temperature range is acceptable.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different current rating?

A: Yes. Substitute parts with equal or higher current ratings are electrically compatible. The original 0791070019 is rated at 1A. Substitutes rated at 2A or 3.9A per contact provide additional margin and are directly interchangeable from an electrical standpoint. However, PCB trace sizing and power distribution design must accommodate the original 1A specification unless the system design is updated.

Q: What is the impact of post contact finish differences (tin vs. tin-lead)?

A: Post contact finish affects solder joint reliability and thermal cycling performance. Tin-lead finishes (original part) provide superior wetting and joint strength in traditional lead-based solder processes. Tin finishes (most substitutes) are lead-free compliant and perform adequately in lead-free solder processes. Selection depends on your manufacturing process and soldering specifications.

Q: Are the Samtec MMS-120-01-L-DV variants with 39-position loading compatible?

A: No. These variants are not electrically equivalent to the 40-position original. They feature one position omitted and require application-specific validation to confirm that the missing position does not carry critical signals. Use only if your application design explicitly accommodates 39-position loading.

Q: What is the significance of insulation material differences (thermoplastic vs. LCP)?

A: Insulation material affects thermal stability, dimensional consistency, and moisture absorption. Liquid Crystal Polymer (LCP) materials used in Samtec and Harwin parts offer superior thermal and dimensional stability compared to thermoplastic materials. LCP is preferred for high-reliability and high-temperature applications. Thermoplastic materials are adequate for general-purpose and automotive applications within the specified temperature range.

Q: Can I substitute the 3M 150240-6002-RB if my application only requires 125V?

A: Yes. The 3M part is rated for 500VDC, which exceeds your 125V requirement. However, the contact length post is 0.100" compared to the original 0.118". This 0.018" difference requires PCB footprint validation to ensure proper solder joint formation and mechanical engagement with mating connectors.

Q: Which substitute offers the best supply availability?

A: The Molex 0791077019 offers the highest inventory (10,776 units) and is the direct series successor. For long-term supply assurance, this is the recommended primary choice. Secondary options include TE Connectivity 4-1734506-3 (6,053 units) and Amphenol ICC 63453-140LF (1,272 units).

Q: Are all substitutes RoHS compliant?

A: No. The original Molex 0791070019 is RoHS non-compliant. All listed substitutes except the direct successor Molex 0791077019 are ROHS3 compliant or RoHS compliant. If RoHS compliance is required for your application, the Molex 0791077019 is the recommended choice as the direct compliant successor.

Q: What packaging formats are available for these substitutes?

A: Packaging varies by manufacturer. Molex 0791077019 is supplied in tubes. The 3M 150240-6002-RB and TE Connectivity 4-1734506-3 are supplied in trays. Amphenol ICC 63453-140LF and Samtec MMS-120-01-F-DV are supplied in tubes. Harwin M22-7142042 is supplied in tubes. Confirm packaging requirements with your procurement process.

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