| PartNumber | 4-640861-8 | 4-640866-8 | 4-640859-2 |
| Description | Standard Card Edge Connectors 18P MTA156 EDGE CONN ASSY LF | Standard Card Edge Connectors 18CIR MTA156 P/M EDG/CONN LF | Standard Card Edge Connectors 12CIR MTA156 EDGE CONN LF |
| Manufacturer | TE Connectivity | TE Connectivity | TE Connectivity |
| Product Category | Standard Card Edge Connectors | Standard Card Edge Connectors | Standard Card Edge Connectors |
| RoHS | Y | - | - |
| Product | IDC | IDC | IDC |
| Number of Positions | 18 Position | 18 Position | 12 Position |
| Pitch | 3.96 mm | 3.96 mm | 3.96 mm |
| Mounting Style | Wire | Wire | Wire |
| Mounting Angle | Vertical | Horizontal | Horizontal |
| Contact Plating | Tin | Tin | Tin |
| Series | MTA-156 | MTA-156 | MTA-156 |
| Housing Material | Polyester | Polyester | Polyester |
| Brand | TE Connectivity / AMP | TE Connectivity / AMP | TE Connectivity / AMP |
| Contact Material | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze |
| Product Type | Standard Card Edge Connectors | Standard Card Edge Connectors | Standard Card Edge Connectors |
| Factory Pack Quantity | 1 | - | - |
| Subcategory | Card Edge Connectors | Card Edge Connectors | Card Edge Connectors |
| Tradename | MTA | - | - |
| Part # Aliases | 4-640861-8 | - | - |