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| PartNumber | 66951-020LF | 66951-021 | 66951-020 |
| Description | Headers & Wire Housings PCB CONNECTOR 20P | Headers & Wire Housings | Headers & Wire Housings PCB CONNECTOR 20P |
| Manufacturer | FCI / Amphenol | Amphenol FCI | - |
| Product Category | Headers & Wire Housings | Rectangular Connectors - Headers, Receptacles, Female Sockets | - |
| RoHS | Y | - | - |
| Product | Headers | - | - |
| Type | Socket Assembly | - | - |
| Number of Positions | 20 Position | 21 | - |
| Pitch | 2.54 mm | 0.100" (2.54mm) | - |
| Number of Rows | 1 Row | 1 | - |
| Mounting Style | - | - | - |
| Termination Style | Through Hole | - | - |
| Mounting Angle | Vertical | - | - |
| Contact Gender | Socket (Female) | - | - |
| Contact Plating | Gold | - | - |
| Series | Dubox | BERCON PV | - |
| Tradename | DUBOX | - | - |
| Packaging | Tube | Tube | - |
| Current Rating | 3 A | - | - |
| Housing Material | Thermoplastic | - | - |
| Voltage Rating | 1.25 kV | - | - |
| Brand | Amphenol FCI | - | - |
| Contact Material | Beryllium Copper | - | - |
| Latching Type | Unlatched | - | - |
| Product Type | Headers & Wire Housings | - | - |
| Factory Pack Quantity | 11 | - | - |
| Subcategory | Headers & Wire Housings | - | - |
| Part # Aliases | 66951020LF | - | - |
| Color | - | Black | - |
| Termination | - | Solder | - |
| Mounting Type | - | Through Hole | - |
| Features | - | - | - |
| Connector Type | - | Receptacle | - |
| Contact Finish | - | Gold | - |
| Contact Finish Thickness | - | 30μin (0.76μm) | - |
| Number of Positions Loaded | - | All | - |
| Contact Type | - | Female Socket | - |
| Row Spacing | - | - | - |
| Fastening Type | - | - | - |