Equivalent & Substitute Parts for Molex 0900750139

Part Overview

The Molex 0900750139 is a modular connector plug designed for 8-position 8-contact (8P8C) RJ45 Ethernet applications. This unshielded IDC connector features a translucent polycarbonate housing with gold-plated phosphor bronze contacts rated for 1.5A at 125V. The product is classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and component procurement.

Substiute Parts

0900750139

MolexIn Stock: 10000900750139 Datasheet

Current PartRFQ

A-MO 8/8-F50

Assmann WSW ComponentsIn Stock: 15210A-MO 8/8-F50 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0900750139 is determined by the following critical parameters:

• Connector Type: Must be Plug configuration
• Contact Configuration: Must be 8P8C (RJ45, Ethernet) standard
• Shielding: Must be Unshielded to match original specification
• Termination Method: Must be IDC (Insulation Displacement Contact)
• Housing Material: Must be Polycarbonate (PC)
• Contact Finish: Must be Gold-plated
• Electrical Ratings: Substitute must meet or exceed 1.5A current and 125V voltage requirements
• Compliance: Must maintain ROHS3 compliance and REACH unaffected status

The Assmann WSW Components A-MO 8/8-F50 satisfies all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The Assmann WSW Components A-MO 8/8-F50 is a direct functional equivalent to the obsolete Molex 0900750139. Both components maintain identical compliance certifications (ROHS3 and REACH unaffected status) and share all critical electrical and mechanical parameters. The substitute part demonstrates superior electrical ratings (2A at 250V versus 1.5A at 125V), providing enhanced performance margin within the same physical form factor and termination interface.

The A-MO 8/8-F50 is classified as active product status with substantial inventory availability (15,115 units), ensuring reliable procurement for replacement and new applications. The contact material composition differs (copper alloy versus phosphor bronze), though both materials provide equivalent performance within the specified electrical parameters and gold plating thickness.

Frequently Asked Questions (FAQ)

Q: Can the Assmann A-MO 8/8-F50 be used as a direct replacement for the Molex 0900750139?

A: Yes. Both connectors share identical 8P8C RJ45 configuration, unshielded design, IDC termination method, polycarbonate housing, and gold contact finish. Electrical ratings of the substitute meet or exceed the original specification.

Q: What is the physical length difference between these connectors?

A: The Molex 0900750139 measures 0.524" (13.30mm) in length, while the Assmann A-MO 8/8-F50 measures 0.978" (24.84mm). This dimensional difference must be evaluated within the specific application context to ensure mechanical fit within cable assemblies and connector housings.

Q: Are there compliance differences between the two parts?

A: No. Both components maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity levels are identical at MSL 1 (unlimited).

Q: What is the difference in contact material composition?

A: The Molex part uses phosphor bronze contacts, while the Assmann substitute uses copper alloy contacts. Both materials are gold-plated to 50.0µin (1.27µm) thickness and perform equivalently within the specified electrical parameters.

Q: Does the cable type specification affect substitution eligibility?

A: The Molex 0900750139 specifies flat oval cable (not specified for stranded/solid), while the Assmann A-MO 8/8-F50 is rated for flat oval cable with stranded wires. Both are compatible with standard IDC termination processes for 8P8C connectors.

Q: What are the electrical performance differences?

A: The Assmann substitute is rated for 2A at 250V, compared to the original 1.5A at 125V specification. The higher ratings provide additional safety margin and are fully compatible with applications designed for the original part's electrical requirements.