Molex 0553595078 CompactFlash Card Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0553595078 is a 50-position CompactFlash Type I/II surface mount right-angle card connector with gold plating, designed for memory card applications requiring push-in/pull-out insertion. This connector features board and card guides with a mounting height of 6.00mm above the board. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing design support, legacy system maintenance, and component procurement.

Substiute Parts

0553595078

MolexIn Stock: 16660553595078 Datasheet

Current PartRFQ

N7E50-N516RB-40-WF

3MIn Stock: 3075N7E50-N516RB-40-WF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0553595078 is determined by strict alignment of the following parameters:

• Card Type: CompactFlash® Type I/II compatibility
• Number of Positions: 50-position configuration
• Mounting Type: Surface mount, right-angle orientation
• Insertion Method: Push-in/pull-out mechanism
• Contact Finish: Gold plating
• Mounting Feature: Reverse-bottom configuration
• Board Guide and Card Guide: Both features present

The 3M N7E50-N516RB-40-WF meets all substitution criteria. Both connectors share identical functional specifications for card type, position count, mounting orientation, and insertion mechanism. Minor variations in mounting height (6.00mm vs. 6.30mm) and contact finish thickness remain within acceptable tolerance ranges for CompactFlash applications and do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 3M N7E50-N516RB-40-WF is the qualified substitute for the obsolete Molex 0553595078. Selection is based on:

• Functional Equivalence: Both connectors support identical CompactFlash Type I/II card specifications with 50-position configurations and right-angle surface mount orientation.
• Compliance Alignment: The 3M part maintains RoHS compliance (RoHS Compliant vs. ROHS3 Compliant), ensuring regulatory compatibility for new designs and legacy system updates.
• Active Product Status: The 3M connector is currently in active production, providing reliable long-term availability and supply chain continuity compared to the obsolete Molex part.
• Mechanical Compatibility: Both connectors feature identical board and card guides with reverse-bottom mounting, supporting direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 3M N7E50-N516RB-40-WF be used as a direct replacement for the Molex 0553595078?

A: Yes. Both connectors meet the core substitution criteria: 50-position CompactFlash Type I/II configuration, surface mount right-angle orientation, push-in/pull-out insertion, gold contact finish, and reverse-bottom mounting with board and card guides.

Q: What is the significance of the 0.30mm height difference between the two connectors?

A: The Molex part measures 6.00mm above the board while the 3M part measures 6.30mm. This 0.30mm difference is within standard PCB design tolerances for CompactFlash applications and does not affect electrical performance or card insertion/ejection mechanics.

Q: Are there any compliance differences between the two parts?

A: The Molex 0553595078 is ROHS3 Compliant, while the 3M N7E50-N516RB-40-WF is RoHS Compliant. Both meet regulatory requirements for their respective product generations. The 3M part's active status ensures ongoing compliance support.

Q: What packaging format is available for the 3M substitute?

A: The 3M N7E50-N516RB-40-WF is supplied in Cut Tape (CT) packaging, matching the original Molex part's packaging format.

Q: Why is the Molex part listed as obsolete?

A: Product obsolescence reflects end-of-life status from the manufacturer. The 3M equivalent remains in active production, providing a viable path for component sourcing and design continuity.