Molex 0791090021 Equivalent & Substitute Parts

Part Overview

The Molex 0791090021 is a 44-position receptacle connector with 0.079" (2.00mm) pitch, designed for surface mount applications in board-to-board or cable interconnections. This connector features gold-plated mating contacts, push-pull fastening, and operates across -55°C to 125°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	44
Pitch - Mating	0.079" (2.00mm)
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Surface Mount
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Current Rating	1A
Voltage Rating	125V
Operating Temperature	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the Molex 0791090021 is determined by strict equivalence across the following critical parameters:

Connector Type & Contact Configuration: Receptacle with female socket contacts
Position Count & Pitch: 44 positions at 0.079" (2.00mm) mating pitch
Row Configuration: 2 rows with 0.079" (2.00mm) row spacing
Mounting & Termination: Surface mount with solder termination
Fastening Mechanism: Push-pull fastening system
Contact Material & Finish: Gold-plated mating surface
Electrical Ratings: Minimum 1A current, 125V voltage
Environmental Compliance: UL94 V-0 flammability rating

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalent (Molex Series): The Molex 0791091021 maintains identical mechanical and electrical specifications with improved RoHS3 compliance and active product status.

Cross-Manufacturer Alternatives: 3M 1502 series (150244-2000-RB, 150244-2000-RB-WF, 150244-2020-RB), Amphenol ICC Minitek® 2.00mm series (55510-044LF, 55510-144TRLF, 55510-344LF, 55510-344TRLF), and Sullins Connector Solutions header variants (NPPN222FFKP-RC, NPPN222FFKS-RC) meet core dimensional and electrical compatibility criteria.

Parameter Comparison

Parameter	Molex 0791090021	Molex 0791091021	3M 150244-2000-RB	3M 150244-2020-RB	Amphenol 55510-044LF	Amphenol 55510-144TRLF	Sullins NPPN222FFKP-RC
Manufacturer	Molex	Molex	3M	3M	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Sullins
Connector Type	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle	Header
Number of Positions	44	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)	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	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
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
Current Rating (Amps)	1A	1A	1A	1A	2A	2A	2A
Voltage Rating	125V	125V	500VDC	500VDC	200V	200V	—
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Packaging	—	Tube	Tray	Bulk	Tube	Tape & Reel (TR)	Tube

Engineering Selection Recommendations

Primary Recommendation: Molex 0791091021

The Molex 0791091021 is the direct successor to the obsolete 0791090021, maintaining identical mechanical dimensions, electrical ratings, and operating temperature range. The primary distinction is ROHS3 compliance and active product status with 6347 units in stock. This part is the optimal choice for designs requiring exact form-fit-function replacement with modern regulatory compliance.

Secondary Recommendations: 3M 1502 Series

The 3M 150244-2000-RB, 150244-2000-RB-WF, and 150244-2020-RB variants provide RoHS-compliant alternatives with enhanced voltage rating (500VDC) and active product status. These parts are suitable for applications where higher voltage margins are beneficial. The 150244-2020-RB includes board guide features for improved mechanical stability.

Tertiary Recommendations: Amphenol ICC Minitek® 2.00mm Series

The Amphenol 55510-044LF, 55510-144TRLF, 55510-344LF, and 55510-344TRLF connectors maintain full dimensional and pitch compatibility with enhanced current rating (2A) and RoHS compliance. These parts support the full operating temperature range (-55°C ~ 125°C) matching the original specification. Tape & Reel packaging variants (55510-144TRLF, 55510-344TRLF) are available for automated assembly.

Alternative Consideration: Sullins Connector Solutions NPPN222 Series

The NPPN222FFKP-RC and NPPN222FFKS-RC are header-type connectors with identical pitch and position count. These parts feature ROHS3 compliance and 2A current rating but operate at reduced temperature range (-40°C ~ 105°C). Selection of header variants requires confirmation that mating connector compatibility is maintained in the application.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0791090021 be directly replaced with the Molex 0791091021?

A: Yes. The 0791091021 is the direct active equivalent with identical mechanical and electrical specifications. The primary difference is ROHS3 compliance and active manufacturing status. No design modifications are required.

Q: What are the key differences between Molex and 3M alternatives?

A: The 3M 1502 series provides higher voltage rating (500VDC vs. 125V) and RoHS compliance. Operating temperature is reduced to -55°C ~ 105°C. Insulation material differs (Thermoplastic vs. Liquid Crystal Polymer). These parts are mechanically and electrically compatible for applications within the specified temperature range.

Q: Are Amphenol Minitek® connectors fully compatible?

A: Amphenol 55510 series connectors maintain pitch, position count, and row spacing compatibility. Current rating is enhanced to 2A. Operating temperature matches the original (-55°C ~ 125°C). Confirm mating connector compatibility before selection, as cross-manufacturer mating may require verification.

Q: What is the difference between packaging options?

A: Tube packaging is suitable for manual assembly and lower-volume applications. Tape & Reel (TR) packaging is optimized for automated pick-and-place assembly. Tray and Bulk packaging are available for specific inventory and handling requirements. Packaging does not affect electrical or mechanical performance.

Q: Can header-type connectors (Sullins NPPN222) be used as direct replacements?

A: Header connectors differ in contact type and mating interface. While pitch and position count are identical, the mating connector must be compatible with header-type receptacles. Confirm application requirements before substitution. Operating temperature range is reduced to -40°C ~ 105°C.

Q: Which substitute part offers the best compliance profile?

A: The Molex 0791091021 provides ROHS3 compliance with identical specifications. The 3M 1502 series and Amphenol 55510 series offer RoHS compliance with enhanced electrical ratings. Sullins NPPN222 series provides ROHS3 compliance. Selection depends on specific regulatory requirements and application constraints.

Q: Are there inventory considerations for substitute selection?

A: Molex 0791091021 has 6347 units in stock. 3M alternatives range from 879 to 1497 units. Amphenol variants range from 672 to 977 units. Sullins parts have 731 to 807 units available. Inventory levels support production requirements across all recommended alternatives.

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