Amphenol ICC 51940-179 Backplane Connector Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51940-179 is a 36-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 12 signal and 24 power positions with gold-plated contacts rated for -20°C to 105°C operation.

The 51940-179 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications requiring this connector specification.

Substiute Parts

51940-179

Amphenol ICC (FCI)In Stock: 72751940-179 Datasheet

Current PartRFQ

51940-179LF

Amphenol ICC (FCI)In Stock: 89451940-179LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 51940-179 is determined by strict equivalence across the following critical parameters:

• Connector type: Receptacle with female sockets and blade sockets
• Position count: 36 positions
• Pitch specification: 0.100" (2.54mm)
• Row configuration: 4 rows
• Contact layout: 12 signal, 24 power
• Mounting method: Through hole with solder termination
• Contact finish: Gold or Gold, GXT™ at 30.0µin thickness
• Flammability rating: UL94 V-0
• Operating temperature: -20°C to 105°C

The substitute part 51940-179LF maintains identical electrical and mechanical specifications across all these parameters, ensuring direct functional equivalence for PCB-level integration.

Parameter Comparison

Engineering Selection Recommendations

The 51940-179LF is the direct active substitute for the obsolete 51940-179. Both parts maintain identical electrical and mechanical specifications, ensuring pin-for-pin and footprint compatibility.

The 51940-179LF offers the following advantages for new designs and production continuity:

• Active product status with ongoing manufacturer support and supply availability
• RoHS compliance, meeting current environmental and regulatory requirements
• Tray packaging suitable for automated assembly processes
• Identical contact specifications, flammability rating, and temperature operating range

For applications currently using the 51940-179, transition to the 51940-179LF requires no design modifications. PCB layouts, connector mating interfaces, and electrical performance remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can the 51940-179LF be used as a direct replacement for the 51940-179?

A: Yes. The 51940-179LF is electrically and mechanically equivalent to the 51940-179 across all specified parameters. No design changes are required for substitution.

Q: What is the difference between the 51940-179 and 51940-179LF?

A: The primary differences are product status, RoHS compliance, and packaging. The 51940-179 is obsolete and RoHS non-compliant, while the 51940-179LF is active and RoHS compliant. The 51940-179LF uses tray packaging instead of bulk packaging.

Q: Are the contact specifications identical between these parts?

A: Yes. Both parts feature 36 positions with 12 signal and 24 power contacts, 0.100" pitch, gold plating at 30.0µin thickness, and identical operating temperature range of -20°C to 105°C.

Q: Does the packaging difference affect PCB assembly?

A: The 51940-179LF tray packaging is compatible with standard automated pick-and-place assembly equipment. Bulk packaging of the 51940-179 required manual handling. Tray packaging improves assembly efficiency and reduces handling damage.

Q: Is the 51940-179LF suitable for new product designs?

A: Yes. The 51940-179LF is the recommended choice for new designs. Its active status, RoHS compliance, and modern packaging make it the appropriate selection for current manufacturing processes.