| Part Number | 2057960-1 | 2057990-1 |
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| Manufacturer | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors |
| Category | Backplane Connectors - Specialized | Backplane Connectors - Specialized |
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| Product Status | Active | Active |
| Connector Usage | Daughtercard | Daughtercard |
| Connector Type | Receptacle, Female Sockets | Receptacle, Female Sockets |
| Connector Style | Impact, Guide Right | Impact, Guide Right |
| Number of Positions | 144 | 252 |
| Number of Positions Loaded | All | All |
| Pitch | 0.075" (1.91mm) | 0.075" (1.91mm) |
| Number of Rows | 12 | 18 |
| Number of Columns | 12 | 14 |
| Mounting Type | Board Edge, Through Hole, Right Angle | Board Edge, Through Hole, Right Angle |
| Termination | Press-Fit | Press-Fit |
| Contact Layout, Typical | - | - |
| Features | Board Guide | Board Guide |
| Contact Finish | Gold | Gold |
| Contact Finish Thickness | 30.0µin (0.76µm) | 30.0µin (0.76µm) |
| Color | Black | Black |