Amphenol ICC 51731-001 Backplane Connector Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51731-001 is a 40-position blade power header connector designed for board edge, through-hole, right-angle mounting applications. This connector features male pins and blades with a 0.100" (2.54mm) pitch, organized in 4 rows with 28 signal and 12 power contacts. The connector incorporates board lock and mating guide features for secure assembly.

The 51731-001 carries an obsolete product status, making identification of active equivalent parts essential for ongoing design support and procurement. The substitute part 51731-001LF provides functional equivalence while maintaining active product status and improved compliance characteristics.

Substiute Parts

51731-001

Amphenol ICC (FCI)In Stock: 106551731-001 Datasheet

Current PartRFQ

51731-001LF

Amphenol ICC (FCI)In Stock: 91851731-001LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the 51731-001 and 51731-001LF is valid based on identical electrical and mechanical parameters:

Critical Matching Parameters:

• Connector type, position count, and pitch (40 positions at 0.100" spacing)
• Physical configuration: 4-row blade power header with right-angle board edge mounting
• Contact layout: 28 signal and 12 power contacts
• Termination method: Solder attachment
• Contact finish specification: Gold or Gold, GXT™
• Operating temperature range: -20°C ~ 105°C
• Material flammability: UL94 V-0
• Moisture sensitivity: MSL 1

The primary distinction between these parts is product status and compliance posture. The 51731-001LF represents the active production equivalent with RoHS compliance and REACH applicability, while the 51731-001 is obsolete and RoHS non-compliant.

Parameter Comparison

Engineering Selection Recommendations

The 51731-001LF is the appropriate selection for new designs and ongoing procurement due to its active product status and RoHS compliance. This part maintains full electrical and mechanical compatibility with the obsolete 51731-001 while providing regulatory compliance for modern supply chain requirements.

For existing designs currently using the 51731-001, direct substitution with the 51731-001LF is supported without circuit modification or re-qualification, provided that RoHS compliance and REACH applicability align with system requirements.

The identical contact layout, pitch, mounting configuration, and operating specifications ensure functional interchangeability. Both parts are supplied in the PwrBlade® series with equivalent performance characteristics across the specified temperature range.

Frequently Asked Questions (FAQ)

Q: Can the 51731-001LF directly replace the 51731-001 in existing assemblies?

A: Yes. The 51731-001LF provides direct functional equivalence. All electrical and mechanical parameters are identical, including connector type, position count, pitch, contact layout, mounting method, and operating temperature range. No circuit redesign is required.

Q: What is the primary difference between these two parts?

A: The 51731-001 is obsolete and RoHS non-compliant, while the 51731-001LF is an active product with RoHS compliance and REACH applicability. The functional specifications are identical.

Q: Are there packaging differences between the 51731-001 and 51731-001LF?

A: The 51731-001LF is supplied in Tray packaging. Packaging information for the 51731-001 is not specified in the available data.

Q: Do both parts support the same contact finish specifications?

A: Yes. Both parts feature Gold or Gold, GXT™ contact finish with 30.0µin (0.76µm) thickness, ensuring equivalent electrical performance and reliability.

Q: What is the moisture sensitivity level for these connectors?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Are there any compliance considerations when selecting between these parts?

A: The 51731-001LF is RoHS compliant and REACH affected, making it suitable for applications with regulatory compliance requirements. The obsolete 51731-001 is RoHS non-compliant and should not be used in new designs subject to RoHS regulations.