Amphenol ICC 51929-003 Backplane Connector Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51929-003 is a 33-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 utilizes a 0.100" (2.54mm) pitch configuration with 4 rows of contacts arranged in a 24 signal, 9 power contact layout.

The 51929-003 carries an 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 remains in use.

Substiute Parts

51929-003

Amphenol ICC (FCI)In Stock: 102851929-003 Datasheet

Current PartRFQ

51929-003LF

Amphenol ICC (FCI)In Stock: 115151929-003LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 51929-003 is determined by strict equivalence across the following critical parameters:

• Connector Type & Style: Receptacle with female sockets and blade sockets for blade power applications
• Position Count & Layout: 33 positions with 24 signal and 9 power contacts
• Pitch & Row Configuration: 0.100" (2.54mm) pitch with 4-row arrangement
• Mounting & Termination: Through-hole PCB mounting with press-fit, quick connect, and solder termination options
• Contact Specifications: Gold or Gold, GXT™ finish at 30.0µin (0.76µm) thickness
• Environmental Ratings: UL94 V-0 flammability, -20°C to 105°C operating range, MSL 1

The substitute part 51929-003LF maintains full electrical and mechanical compatibility with the original 51929-003 while offering improved compliance status and active product availability.

Parameter Comparison

Engineering Selection Recommendations

The 51929-003LF is the direct substitute for the obsolete 51929-003. Both connectors are electrically and mechanically identical across all functional parameters, including connector type, position count, pitch, contact layout, mounting method, and environmental ratings.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The 51929-003LF carries active product status with RoHS compliance and REACH applicability, whereas the 51929-003 is obsolete and RoHS non-compliant. For new designs or ongoing production requiring this connector type, the 51929-003LF is the appropriate selection. For legacy system maintenance where the original 51929-003 is specified, the 51929-003LF provides full functional equivalence with improved compliance posture.

Frequently Asked Questions (FAQ)

Q: Are the 51929-003 and 51929-003LF electrically interchangeable?

A: Yes. Both connectors share identical electrical specifications including contact type, contact finish, contact layout (24 signal, 9 power), and operating temperature range (-20°C to 105°C). They are fully interchangeable in electrical function.

Q: Are the 51929-003 and 51929-003LF mechanically interchangeable?

A: Yes. Both connectors have identical mechanical specifications: 33 positions, 0.100" (2.54mm) pitch, 4-row configuration, through-hole mounting, and black color. PCB footprints and mounting requirements are identical.

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

A: The 51929-003LF differs from the 51929-003 in three aspects: product status (active versus obsolete), RoHS compliance (compliant versus non-compliant), and packaging format (tray versus bulk). The connector itself is functionally identical.

Q: Why should I use the 51929-003LF instead of the 51929-003?

A: The 51929-003LF is the active product offering with current manufacturing support and RoHS compliance. The 51929-003 is obsolete and no longer actively produced. For supply chain continuity and regulatory compliance, the 51929-003LF is the recommended selection.

Q: Can I use the 51929-003LF in a design originally specified for the 51929-003?

A: Yes. The 51929-003LF is a direct substitute with full electrical and mechanical compatibility. No design changes are required.

Q: What packaging formats are available?

A: The 51929-003 was supplied in bulk packaging. The 51929-003LF is supplied in tray packaging, which provides improved protection and handling during storage and transport.