Molex 0879781021 DDR2 SDRAM DIMM Socket - Equivalent & Substitute Parts

Part Overview

The Molex 0879781021 is a 240-position DIMM socket connector designed for DDR2 SDRAM memory applications. This through-hole mounted connector features board lock and latch mechanisms, with gold-plated contacts and MO-237 standard compliance. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

0879781021

MolexIn Stock: 10470879781021 Datasheet

Current PartRFQ

10005639-11107LF

Amphenol ICC (FCI)In Stock: 197710005639-11107LF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Molex 0879781021 is determined by strict equivalence across the following critical parameters:

• Connector Style & Position Count: Both parts must be DIMM connectors with exactly 240 positions to ensure mechanical and electrical compatibility with DDR2 SDRAM modules.
• Memory Type: DDR2 SDRAM specification is mandatory for signal integrity and timing compliance.
• Mounting Configuration: Through-hole mounting with standard top-mounted orientation ensures PCB assembly compatibility.
• Standards Compliance: MO-237 standard adherence guarantees pin assignment and mechanical envelope conformity.
• Physical Dimensions: Card thickness of 0.050" (1.27mm) and contact specifications must match to prevent module insertion issues.
• Contact Properties: Gold plating at 15.0µin thickness provides equivalent electrical performance and corrosion resistance.
• Functional Features: Board lock and latch mechanisms must be present for secure module retention.

The Amphenol ICC (FCI) part 10005639-11107LF meets all these criteria and is identified as the manufacturer-recommended substitute.

Parameter Comparison

Engineering Selection Recommendations

The Amphenol ICC (FCI) 10005639-11107LF is the direct functional equivalent for the obsolete Molex 0879781021. Selection of this substitute is supported by:

• Complete Parameter Equivalence: All electrical, mechanical, and dimensional specifications match the original part without deviation.
• Active Product Status: The substitute maintains active manufacturing and distribution status, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: Both RoHS and REACH compliance certifications are maintained, with identical ECCN and HTSUS classifications confirming regulatory equivalence.
• Moisture Sensitivity: Identical MSL rating of 1 (Unlimited) eliminates moisture handling and storage requirement changes.
• Manufacturer Recommendation: This part is designated as the manufacturer-recommended substitute, confirming engineering validation.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol ICC 10005639-11107LF be used as a direct replacement for the Molex 0879781021 in existing PCB designs?

A: Yes. All critical parameters—connector style, position count, memory type, mounting configuration, standards compliance, and physical dimensions—are identical. No PCB layout modifications are required.

Q: What is the significance of the product status change from Obsolete to Active?

A: The Molex part is no longer manufactured. The Amphenol ICC substitute is actively produced and distributed, ensuring component availability for new production runs and field replacements.

Q: Are there any differences in packaging between these parts?

A: The Molex 0879781021 packaging is not specified in the available data. The Amphenol ICC 10005639-11107LF is supplied in Tray packaging. Confirm packaging requirements with your procurement process.

Q: Do the RoHS compliance levels differ between these parts?

A: The Molex part is ROHS3 Compliant, while the Amphenol ICC part is RoHS Compliant. Both meet current regulatory requirements. Verify your specific RoHS compliance requirement (ROHS2 or ROHS3) with your quality or compliance department.

Q: Are the contact finish specifications identical?

A: Yes. Both parts feature gold plating at 15.0µin (0.38µm) thickness, providing equivalent electrical performance, signal integrity, and corrosion resistance for DDR2 SDRAM applications.

Q: What should be verified before implementing this substitution in production?

A: Confirm that your PCB assembly process, test procedures, and quality acceptance criteria are compatible with the Amphenol ICC part. Verify packaging and delivery requirements with your supplier.