Molex 0877159309 PCI Express Female Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0877159309 is a 164-position female connector for PCI Express applications with 0.039" (1.00mm) pitch. This connector features a through-hole solder termination with staggered contact arrangement, dual read-out configuration, and board guide with locking ramp. The product is currently obsolete, making identification of active equivalent parts essential for ongoing system support and new design implementations.

Substiute Parts

0877159309

MolexIn Stock: 8900877159309 Datasheet

Current PartRFQ

1759921-4

TE Connectivity AMP ConnectorsIn Stock: 11681759921-4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Molex 0877159309 is determined by strict equivalence across the following critical parameters:

• Card Type: PCI Express™ (mandatory match)
• Gender: Female (mandatory match)
• Number of Positions: 164 (mandatory match)
• Pitch: 0.039" (1.00mm) (mandatory match)
• Card Thickness: 0.062" (1.57mm) (mandatory match)
• Number of Rows: 2 (mandatory match)
• Read Out: Dual (mandatory match)
• Mounting Type: Through Hole (mandatory match)
• Termination: Solder, Staggered (mandatory match)
• Contact Material: Phosphor Bronze (mandatory match)
• Contact Finish: Gold (mandatory match)
• Insulation Material: Polyamide (PA46), Nylon 4/6, Glass Filled (mandatory match)
• RoHS Status: ROHS3 Compliant (mandatory match)
• MSL Rating: 1 (Unlimited) (mandatory match)

The TE Connectivity AMP Connectors part 1759921-4 meets all mandatory substitution criteria and is classified as an active product, providing direct functional equivalence for the obsolete Molex connector.

Parameter Comparison

Engineering Selection Recommendations

The TE Connectivity 1759921-4 is the direct functional equivalent for the obsolete Molex 0877159309. Both connectors maintain identical electrical and mechanical specifications across all critical parameters required for PCI Express card edge applications.

The TE Connectivity part carries active product status, ensuring ongoing availability and manufacturer support. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, meeting current regulatory requirements.

The contact finish thickness difference (30.0µin versus 15.0µin) does not affect functional equivalence, as both exceed minimum contact durability requirements for the specified application. The color difference (Black versus Natural) is a cosmetic variation with no electrical or mechanical impact.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 1759921-4 directly replace the Molex 0877159309 in existing designs?

A: Yes. The TE Connectivity part meets all mandatory electrical and mechanical parameters, including pitch, position count, card thickness, termination method, and contact material specifications. Physical and electrical compatibility is confirmed.

Q: What is the significance of the contact finish thickness difference?

A: The contact finish thickness difference (30.0µin versus 15.0µin) represents a variation in gold plating depth. Both values are within acceptable ranges for PCI Express connector applications and do not affect functional performance or contact reliability.

Q: Does the color difference between Black and Natural affect compatibility?

A: No. Color is a cosmetic characteristic with no electrical or mechanical function. The difference does not impact connector performance or interchangeability.

Q: Why is the Molex part listed as obsolete?

A: Product obsolescence indicates the manufacturer has discontinued production. The TE Connectivity equivalent provides continuity for applications requiring this connector specification.

Q: Are both parts RoHS compliant?

A: Yes. Both the Molex 0877159309 and TE Connectivity 1759921-4 are ROHS3 compliant, meeting current environmental and regulatory standards.

Q: What is the MSL rating significance?

A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling. Standard storage conditions apply without special desiccant requirements.