Amphenol ICC 51940-075 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51940-075 is a 28-position receptacle connector featuring female sockets and blade sockets for through-hole mounting on printed circuit boards. This connector is part of the PwrBlade® series and combines 24 signal contacts with 4 power contacts in a blade power configuration. The part is currently classified as obsolete, making identification of suitable substitutes essential for ongoing system support and component procurement.

Substiute Parts

51940-075

Amphenol ICC (FCI)In Stock: 101151940-075 Datasheet

Current PartRFQ

51940-075LF

Amphenol ICC (FCI)In Stock: 94651940-075LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 51940-075 is determined by strict equivalence across the following critical parameters:

• Connector Type & Configuration: Receptacle with female sockets and blade sockets
• Position Count & Layout: 28 positions with 24 signal and 4 power contacts
• Pitch & Geometry: 0.100" (2.54mm) pitch with 4-row arrangement
• Mounting & Termination: Through-hole mounting with press-fit and solder termination capability
• Contact Specifications: Gold or Gold, GXT™ finish at 30.0µin thickness
• Environmental Ratings: UL94 V-0 flammability, -20°C to 105°C operating range
• Mechanical Features: Board lock and guide pin functionality

The substitute part 51940-075LF maintains identical electrical and mechanical specifications while offering improved compliance status and active product availability.

Parameter Comparison

Engineering Selection Recommendations

The 51940-075LF is the direct functional equivalent of the 51940-075. Both parts share identical electrical and mechanical specifications, including connector type, position count, pitch, mounting method, contact finish, and environmental ratings.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The 51940-075 is obsolete and RoHS non-compliant, while the 51940-075LF is an active product that meets RoHS requirements and includes REACH compliance documentation. The 51940-075LF is supplied in tray packaging, providing standardized handling and storage.

For new designs or component replenishment, the 51940-075LF is the appropriate selection. For legacy system maintenance where the original 51940-075 specification must be maintained, the 51940-075LF provides full compatibility while offering improved compliance status and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Are the 51940-075 and 51940-075LF mechanically interchangeable?

A: Yes. Both parts are identical in connector type, position count, pitch, mounting configuration, and physical dimensions. They are direct mechanical substitutes.

Q: What is the difference between these two part numbers?

A: The primary differences are product status and regulatory compliance. The 51940-075 is obsolete and RoHS non-compliant. The 51940-075LF is an active product that meets RoHS requirements and includes REACH compliance. Both maintain identical electrical and mechanical specifications.

Q: Can the 51940-075LF be used as a replacement in existing assemblies designed for the 51940-075?

A: Yes. The 51940-075LF provides full functional and physical compatibility with the 51940-075. No design modifications are required.

Q: What does the "LF" suffix in 51940-075LF indicate?

A: The "LF" suffix typically indicates lead-free compliance and RoHS compliance in Amphenol ICC part numbering conventions.

Q: Are there any packaging differences between these parts?

A: The 51940-075 packaging is not specified in available documentation. The 51940-075LF is supplied in tray packaging. Confirm packaging requirements with your procurement specifications.

Q: What is the contact finish specification for both parts?

A: Both parts feature gold or gold, GXT™ contact finish with a thickness of 30.0µin (0.76µm), ensuring consistent electrical performance and reliability.