Molex 0787301152 DDR4 DIMM Memory Connector Equivalent & Substitute Parts

Part Overview

The Molex 0787301152 is a 288-position DDR4 SDRAM DIMM socket connector designed for surface mount applications. This connector features a 0.85mm pitch design with gold-plated contacts and integrated latches for secure memory module retention. The part is classified as Last Time Buy, indicating discontinued production status. Identification of equivalent and substitute components is necessary to support ongoing design requirements, system maintenance, and procurement continuity for applications utilizing DDR4 memory architecture.

Key Parameters

Parameter	Value
Connector Style	DIMM
Number of Positions	288
Memory Type	DDR4 SDRAM
Mounting Type	Surface Mount
Contact Pitch	0.85mm
Contact Finish	Gold
Contact Finish Thickness	15.0µin (0.38µm)
Standards Compliance	MO-309
Mounting Feature	Normal, Standard - Top
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution of the Molex 0787301152 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Connector Style: DIMM
Number of Positions: 288
Memory Type: DDR4 SDRAM
Mounting Type: Surface Mount
Contact Pitch: 0.85mm
Contact Finish: Gold
Contact Finish Thickness: 15.0µin (0.38µm)
Standards Compliance: MO-309
Mounting Feature: Normal, Standard - Top

The Molex 2128254003 satisfies all mandatory equivalence criteria and is classified as an Active product, providing continued availability and manufacturing support. This part represents a direct functional substitute with enhanced features including Board Lock capability in addition to latches.

Parameter Comparison

Parameter	Molex 0787301152 (Main Part)	Molex 2128254003 (Substitute)	Equivalence Status
Manufacturer	Molex	Molex	Equivalent
Connector Style	DIMM	DIMM	Equivalent
Number of Positions	288	288	Equivalent
Memory Type	DDR4 SDRAM	DDR4 SDRAM	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Contact Finish	Gold	Gold	Equivalent
Contact Finish Thickness	15.0µin (0.38µm)	15.0µin (0.38µm)	Equivalent
Standards Compliance	MO-309	MO-309	Equivalent
Mounting Feature	Normal, Standard - Top	Normal, Standard - Top	Equivalent
Features	Latches	Board Lock, Latches	Substitute Enhanced
Product Status	Last Time Buy	Active	Substitute Active
RoHS Status	RoHS Compliant	Not Specified	Main Part Compliant

Engineering Selection Recommendations

Primary Substitute: Molex 2128254003

The Molex 2128254003 is designated as the manufacturer-recommended substitute for the 0787301152. This selection is based on the following engineering factors:

Functional Equivalence: All critical electrical and mechanical parameters are identical, including 288-position configuration, DDR4 SDRAM compatibility, 0.85mm pitch, and MO-309 standards compliance.
Product Status: The 2128254003 maintains Active product status with ongoing manufacturing support, ensuring long-term availability and supply chain continuity. The 0787301152 is classified as Last Time Buy, indicating end-of-life status.
Standards Compliance: Both parts comply with MO-309 standards for DDR4 DIMM socket connectors, ensuring compatibility with DDR4 memory module specifications.
Enhanced Features: The substitute part includes Board Lock functionality in addition to latches, providing additional mechanical retention capability without compromising backward compatibility.
Contact Specifications: Identical gold contact finish with 15.0µin (0.38µm) thickness ensures equivalent electrical performance and signal integrity.

Frequently Asked Questions (FAQ)

Q: Can the Molex 2128254003 directly replace the 0787301152 in existing designs?

A: Yes. The 2128254003 satisfies all mandatory equivalence criteria for DDR4 DIMM socket applications. Both parts feature identical 288-position configuration, 0.85mm pitch, gold contact finish, and MO-309 standards compliance. The substitute part is electrically and mechanically compatible with DDR4 memory modules designed for the original part.

Q: What is the difference between the latch features on these two parts?

A: The 0787301152 includes latches for memory module retention. The 2128254003 includes both Board Lock and latches, providing dual retention mechanisms. This enhancement does not affect compatibility with standard DDR4 DIMM modules.

Q: Why is the 0787301152 classified as Last Time Buy?

A: Last Time Buy status indicates that the manufacturer has discontinued production of this part number. The 2128254003 represents the active production alternative, ensuring continued availability for new designs and system maintenance.

Q: Are there any differences in mounting or PCB layout requirements?

A: No. Both parts feature identical Surface Mount mounting type with Normal, Standard - Top mounting feature. PCB layout and footprint requirements remain unchanged between the two part numbers.

Q: What is the inventory status for each part?

A: The 0787301152 has 1096 pieces in stock as new original inventory. The 2128254003 has 869 pieces in stock as new original inventory. Inventory levels are subject to change based on current demand and supply conditions.

Q: Do both parts comply with RoHS requirements?

A: The 0787301152 is explicitly RoHS Compliant. RoHS compliance status for the 2128254003 is not specified in the provided technical data.

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