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| PartNumber | 20021831-04020T8LF | 20021831-04006T4LF | 20021831-04020T4LF |
| Description | Headers & Wire Housings 20021831-04020T8LF-1.27 BTB STACK HD VT SMT | Headers & Wire Housings VERT SMT TYPE HDR | Headers & Wire Housings VERT SMT TYPE HDR |
| Manufacturer | FCI / Amphenol | FCI / Amphenol | Amphenol FCI |
| Product Category | Headers & Wire Housings | Headers & Wire Housings | Rectangular - Board to Board Connectors - Board Spacers, Stackers |
| Packaging | Tube | Tube | Tube |
| Brand | Amphenol FCI | Amphenol FCI | - |
| Product Type | Headers & Wire Housings | Headers & Wire Housings | - |
| Factory Pack Quantity | 1848 | 2993 | - |
| Subcategory | Headers & Wire Housings | Headers & Wire Housings | - |
| Color | - | - | Black |
| Series | - | - | 20021831 |
| Termination | - | - | Solder |
| Mounting Type | - | - | Surface Mount |
| Number of Positions | - | - | 20 |
| Pitch | - | - | 0.050" (1.27mm) |
| Number of Rows | - | - | 2 |
| Row Spacing | - | - | 0.050" (1.27mm) |
| Length Overall | - | - | 0.323" (8.20mm) |
| Length Post Mating | - | - | 0.138" (3.50mm) |
| Length Stack Height | - | - | 0.157" (4.00mm) |
| Length Tail | - | - | - |
| Contact Finish Post Mating | - | - | Gold |
| Contact Finish Thickness Post Mating | - | - | 10μin (0.25μm) |