Molex 0791090001 Equivalent & Substitute Parts

Part Overview

The Molex 0791090001 is a 4-position receptacle connector with 0.079" (2.00mm) pitch, designed for surface mount applications in board-to-board or cable interconnections. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support, maintenance, and production continuity. The part operates across automotive, general purpose, and telecommunications applications with a 1A current rating and 125V voltage specification.

Substiute Parts

0791090001

MolexIn Stock: 10990791090001 Datasheet

Current PartRFQ

0791091001

MolexIn Stock: 139900791091001 Datasheet

DirectRFQ

150204-2000-RB

3MIn Stock: 693150204-2000-RB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0791090001 is determined by strict alignment of the following critical parameters:

• Connector geometry: 4-position receptacle with 0.079" (2.00mm) pitch and 2-row configuration
• Mounting interface: Surface mount with solder termination
• Electrical performance: 1A current rating minimum and voltage rating of 125V or greater
• Mechanical compatibility: Push-pull fastening type and female socket contact type
• Environmental rating: Operating temperature range of -55°C to 125°C or broader
• Compliance status: RoHS and REACH certifications where applicable

The Molex 0791091001 qualifies as a direct equivalent within the same manufacturer series (Milli-Grid 79109), differing only in product status (active vs. obsolete) and contact finish post material (tin vs. tin-lead). The 3M 150204-2000-RB represents a cross-manufacturer substitute meeting all critical electrical and mechanical parameters, though with minor variations in insulation height and contact finish thickness specifications.

Parameter Comparison

Engineering Selection Recommendations

Molex 0791091001 is the primary substitute for the obsolete Molex 0791090001. Both components share identical electrical and mechanical specifications within the Milli-Grid 79109 series. The 0791091001 carries active product status with ROHS3 compliance, providing supply continuity and regulatory alignment for new designs and production restocking. The only material difference is the contact finish post composition (tin versus tin-lead), which does not affect functional compatibility in standard applications.

3M 150204-2000-RB serves as a cross-manufacturer alternative when Molex supply is constrained. This part meets all critical substitution criteria: identical pitch, row configuration, mounting type, and electrical ratings. The 3M component offers enhanced voltage rating (500VDC versus 125V) and increased contact finish thickness on mating surfaces (30.0µin versus 15.0µin), providing additional margin in high-reliability applications. The maximum operating temperature is 105°C, which is 20°C lower than the Molex parts; this limitation applies only to applications requiring sustained operation above 105°C. Insulation height variance (0.183" versus 0.175") is within typical PCB layout tolerances for board-to-board spacing.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0791091001 be used as a direct replacement for the 0791090001 in existing designs?

A: Yes. Both parts are mechanically and electrically identical within the Milli-Grid 79109 series. The 0791091001 is the active production equivalent and is suitable for direct substitution in all applications previously using the 0791090001.

Q: What are the key differences between the Molex 0791091001 and the 3M 150204-2000-RB?

A: The primary differences are manufacturer series (Milli-Grid 79109 versus 1502), maximum operating temperature (125°C versus 105°C), contact finish thickness on mating surfaces (15.0µin versus 30.0µin), and insulation height (0.175" versus 0.183"). All other electrical and mechanical parameters are equivalent.

Q: Is the 3M 150204-2000-RB suitable for applications requiring operation above 105°C?

A: No. The 3M part is rated to -55°C ~ 105°C maximum. For applications requiring sustained operation above 105°C, the Molex 0791091001 (-55°C ~ 125°C) is the appropriate selection.

Q: Does the increased contact finish thickness on the 3M part affect compatibility?

A: No. The increased gold plating thickness (30.0µin on 3M versus 15.0µin on Molex) on mating surfaces provides additional corrosion resistance and wear margin without affecting mechanical or electrical compatibility.

Q: Are there packaging differences between these parts?

A: Yes. The Molex 0791090001 and 0791091001 are supplied in tube packaging, while the 3M 150204-2000-RB is supplied in bulk packaging. Packaging selection should align with production volume and handling requirements.

Q: What is the impact of the insulation height difference (0.175" versus 0.183")?

A: The 0.008" (0.20mm) difference is negligible for standard board-to-board spacing applications. PCB layout should accommodate the taller 3M profile if used in space-constrained designs, but this difference does not affect electrical performance or mating compatibility.

Q: Are all three parts RoHS compliant?

A: The Molex 0791090001 is RoHS non-compliant. The Molex 0791091001 is ROHS3 compliant. The 3M 150204-2000-RB is RoHS compliant. For new designs subject to RoHS requirements, either the Molex 0791091001 or 3M 150204-2000-RB is appropriate.