Molex 0791070021 Equivalent & Substitute Parts

Part Overview

The Molex 0791070021 is a 44-position receptacle connector with 0.079" (2.00mm) pitch, designed for board-to-board or cable applications. This connector features gold-plated mating contacts, through-hole solder termination, and push-pull fastening. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support. Active alternatives from Amphenol ICC, Hirose Electric, and Samtec provide functional equivalence while offering improved product status and compliance certifications.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	44
Pitch - Mating	0.079" (2.00mm)
Number of Rows	2
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Operating Temperature	-55°C ~ 125°C
Current Rating	1A
Voltage Rating	125V
Contact Material	Phosphor Bronze
Insulation Color	Black
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict parameter matching across electrical and mechanical dimensions:

Primary Substitution Criteria:

Connector type: Receptacle
Contact type: Female socket
Number of positions: 44
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 shape: Square
Contact material: Phosphor bronze

Secondary Compatibility Parameters:

Operating temperature range: -55°C ~ 125°C (primary part specification)
Insulation color: Black
Insulation material: Thermoplastic or equivalent glass-filled polymer

All listed substitute parts meet these core criteria. Variations in contact finish thickness, post finish material, insulation height, and current rating do not preclude functional substitution when electrical and mechanical interfaces remain compatible.

Parameter Comparison

Parameter	Molex 0791070021	Amphenol ICC 63453-044LF	Amphenol ICC 63453-144LF	Hirose A3D-44DA-2DSE(71)	Samtec MMS-122-01-F-DV	Samtec MMS-122-01-H-DV
Manufacturer	Molex	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Hirose Electric Co Ltd	Samtec Inc.	Samtec Inc.
Series	Milli-Grid 79107	Minitek® 2.00mm	Minitek® 2.00mm	A3	MMS	MMS
Connector Type	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle
Contact Type	Female Socket	Female Socket	Female Socket	Female Socket	Female Socket	Female Socket
Number of Positions	44	44	44	44	44	44
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)
Number of Rows	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)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold
Insulation Color	Black	Black	Black	Black	Black	Black
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	1A	2A	2A	1A	3.9A per Contact	3.9A per Contact
Voltage Rating	125V	200V	200V	200VAC	—	—
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Shape	Square	Square	Square	Square	Square	Square
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

Amphenol ICC 63453-044LF and 63453-144LF (Minitek® 2.00mm Series)

These connectors provide direct functional equivalence with enhanced electrical ratings (2A current, 200V voltage) and active product status. Both parts are RoHS compliant and feature UL94 V-0 flammability rating. The Minitek® series offers improved insulation material (PCT glass-filled) compared to the obsolete Molex part. Inventory availability is strong (775 and 1670 units respectively). These are primary recommendations for new designs requiring RoHS compliance.

Hirose A3D-44DA-2DSE(71) (A3 Series)

This connector maintains the 44-position, 2.00mm pitch configuration with active product status and RoHS compliance. The A3 series features PBT insulation material and UL94 V-0 rating. Operating temperature range is limited to -55°C ~ 85°C, which is narrower than the primary part. Current rating matches the original specification at 1A. This option is suitable for applications where the reduced temperature range is acceptable and board-to-board or cable connectivity is required.

Samtec MMS-122-01-F-DV, MMS-122-01-H-DV, and MMS-122-01-L-DV variants (MMS Series)

The Samtec MMS series provides the highest current capacity (3.9A per contact) with active product status and ROHS3 compliance. These connectors feature Liquid Crystal Polymer (LCP) insulation and maintain full -55°C ~ 125°C operating range. Multiple variants (F-DV, H-DV, L-DV with position-loaded options) accommodate specific design requirements. The MMS-122-01-F-DV and MMS-122-01-H-DV are fully loaded (44 positions), while L-DV variants are loaded with 43 positions. These options are optimal for high-current applications and designs requiring maximum thermal performance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace Molex 0791070021 with any of these substitute parts?

A: Yes, all listed substitutes maintain the critical mechanical and electrical interface parameters: 44 positions, 0.079" (2.00mm) pitch, 2-row configuration, through-hole solder termination, and push-pull fastening. Mating with corresponding plug connectors designed for 2.00mm pitch will function identically.

Q: What are the key differences between the Amphenol ICC and Samtec options?

A: Amphenol ICC 63453-044LF and 63453-144LF (Minitek® series) offer 2A current rating and 200V voltage rating with PCT insulation. Samtec MMS series provides higher current capacity (3.9A per contact) with LCP insulation. Both meet RoHS requirements. Selection depends on application current demands and thermal environment.

Q: Why is the Hirose A3D-44DA-2DSE(71) limited to -55°C ~ 85°C?

A: The Hirose A3 series is specified with an 85°C maximum operating temperature. Applications requiring the full -55°C ~ 125°C range should select Amphenol ICC or Samtec alternatives.

Q: What does "Number of Positions Loaded" mean in the Samtec MMS-122-01-L-DV variants?

A: These variants are manufactured with 43 contact positions loaded instead of all 44. This configuration is used when one position is intentionally left empty for keying or design-specific purposes. Verify your application requires this configuration before selection.

Q: Are all substitute parts RoHS compliant?

A: Yes. Amphenol ICC parts are RoHS Compliant, Hirose is RoHS Compliant, and Samtec parts are ROHS3 Compliant. The original Molex 0791070021 is RoHS non-compliant, making these substitutes necessary for new designs subject to RoHS regulations.

Q: Which substitute offers the best inventory availability?

A: Amphenol ICC 63453-144LF has the highest inventory at 1670 units. Samtec MMS-122-01-L-DV-10 has 963 units, and Hirose A3D-44DA-2DSE(71) has 1109 units. All options provide adequate stock for production requirements.

Q: Can I mix and match plug and receptacle connectors from different manufacturers?

A: No. Connectors must be from the same manufacturer series to ensure proper mating, contact alignment, and fastening compatibility. Use Molex plugs with Molex receptacles, Amphenol plugs with Amphenol receptacles, and so forth.

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