Amphenol ICC 51751-007 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51751-007 is a 43-position receptacle connector featuring female sockets and blade sockets for through-hole PCB mounting in blade power applications. This connector is part of the PwrBlade® series and provides a contact layout of 32 signal and 11 power positions with gold-plated contacts and board lock features.

The 51751-007 is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support legacy system maintenance where this connector type is specified.

Key Parameters

Parameter	Value
Connector Type	Receptacle, Female Sockets and Blade Sockets
Number of Positions	43
Pitch	0.100" (2.54mm)
Number of Rows	4
Mounting Type	Through Hole
Termination	Solder
Contact Layout	32 Signal, 11 Power
Features	Board Lock, Guide Pin
Contact Finish	Gold, 30.0µin (0.76µm)
Color	Black
Operating Temperature	-20°C ~ 105°C
Material Flammability Rating	UL94 V-0
Series	PwrBlade®

Substitute Part Grouping Explanation

Substitution eligibility for the 51751-007 is determined by strict equivalence across the following critical parameters:

Connector type: Receptacle with female sockets and blade sockets
Position count: 43 positions
Pitch specification: 0.100" (2.54mm)
Row configuration: 4 rows
Mounting method: Through hole solder termination
Contact layout: 32 signal and 11 power positions
Physical features: Board lock and guide pin
Contact material and finish: Gold plating at 30.0µin thickness
Connector color: Black
Operating temperature range: -20°C ~ 105°C
Flammability rating: UL94 V-0

The substitute part 51751-007LF maintains full electrical and mechanical compatibility with the original 51751-007 across all specified parameters. The primary distinction is product status and compliance certification.

Parameter Comparison

Parameter	51751-007	51751-007LF
Connector Type	Receptacle, Female Sockets and Blade Sockets	Receptacle, Female Sockets and Blade Sockets
Number of Positions	43	43
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	4	4
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Contact Layout	32 Signal, 11 Power	32 Signal, 11 Power
Features	Board Lock, Guide Pin	Board Lock, Guide Pin
Contact Finish	Gold, 30.0µin (0.76µm)	Gold, 30.0µin (0.76µm)
Color	Black	Black
Operating Temperature	-20°C ~ 105°C	-20°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Series	PwrBlade®	PwrBlade®
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS Compliant
Packaging	Bulk	Tray

Engineering Selection Recommendations

The 51751-007LF is the direct substitute for the obsolete 51751-007. Both connectors are electrically and mechanically identical across all specified parameters. The 51751-007LF offers the following advantages for new designs and legacy system support:

Active product status ensures ongoing availability and supply chain support
RoHS compliance certification meets current environmental and regulatory requirements
Tray packaging provides improved handling and inventory management compared to bulk packaging
REACH compliance status provides additional regulatory documentation for international applications

For applications where RoHS compliance is not a requirement, the 51751-007 and 51751-007LF are functionally interchangeable. For new designs or systems requiring regulatory compliance, the 51751-007LF is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the 51751-007LF be used as a direct replacement for the 51751-007?

A: Yes. The 51751-007LF maintains full electrical and mechanical compatibility with the 51751-007. All connector specifications, including position count, pitch, contact layout, and operating parameters, are identical.

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

A: The 51751-007 is obsolete, while the 51751-007LF is active. The 51751-007LF is RoHS compliant and REACH affected, whereas the 51751-007 is RoHS non-compliant. Packaging differs: the 51751-007 is supplied in bulk, while the 51751-007LF is supplied in trays.

Q: Are there any electrical performance differences between the two parts?

A: No. Both parts have identical electrical specifications: 43 positions, 0.100" pitch, 32 signal and 11 power contact layout, gold contact finish at 30.0µin thickness, and -20°C ~ 105°C operating temperature range.

Q: Does the packaging difference affect connector performance?

A: No. Packaging format (bulk versus tray) affects handling, storage, and logistics only. Connector electrical and mechanical performance is unaffected.

Q: Which part should be specified for new designs?

A: The 51751-007LF should be specified for new designs. It provides active product status, RoHS compliance, and regulatory documentation support.

Q: Can the 51751-007 be used in applications requiring RoHS compliance?

A: No. The 51751-007 is RoHS non-compliant. Applications requiring RoHS certification must use the 51751-007LF.

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