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| PartNumber | 71991-421LF | 71991-422LF | 71991-420LF |
| Description | Board to Board & Mezzanine Connectors 42P BtB RECPT DR TMT TIN/NI VERTICAL | Board to Board & Mezzanine Connectors 44P BtB RECPT DR TMT TIN/NI VERTICAL | Board to Board & Mezzanine Connectors 40P BtB RECPT DR TMT TIN/NI VERTICAL |
| Manufacturer | FCI / Amphenol | FCI / Amphenol | - |
| Product Category | Board to Board & Mezzanine Connectors | Board to Board & Mezzanine Connectors | - |
| RoHS | Y | Y | - |
| Product | Receptacles | Receptacles | - |
| Number of Positions | 42 Position | 44 Position | - |
| Pitch | 2.54 mm | 2.54 mm | - |
| Number of Rows | 2 Row | 2 Row | - |
| Mounting Angle | Vertical | Vertical | - |
| Current Rating | 3 A | 3 A | - |
| Voltage Rating | 1 kV | 1 kV | - |
| Series | Dubox | Dubox | - |
| Packaging | Tube | Tube | - |
| Contact Plating | Tin | Tin | - |
| Housing Material | Thermoplastic | Thermoplastic | - |
| Brand | Amphenol FCI | Amphenol FCI | - |
| Contact Material | Phosphor Bronze | Phosphor Bronze | - |
| Product Type | Board to Board & Mezzanine Connectors | Board to Board & Mezzanine Connectors | - |
| Factory Pack Quantity | 11 | 10 | - |
| Subcategory | Board to Board & Mezzanine Connectors | Board to Board & Mezzanine Connectors | - |
| Tradename | DUBOX | DUBOX | - |
| Part # Aliases | 71991421LF | 71991422LF | - |