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| PartNumber | 4-1977948-0 | 4-1977950-0 | 4-1977949-0 |
| Description | Headers & Wire Housings 40 MODII HDR SRST B/A .100CL 30 PD/NI | Headers & Wire Housings 40 MODII HDR SRST B/A .100CL 30 PD/NI | CONN HEADER VERT 40POS 2.54MM |
| Manufacturer | TE Connectivity | TE Connectivity | - |
| Product Category | Headers & Wire Housings | Headers & Wire Housings | - |
| RoHS | Y | Y | - |
| Product | Headers | Headers | - |
| Type | Breakaway | Breakaway | - |
| Number of Positions | 40 Position | 40 Position | - |
| Pitch | 2.54 mm | 2.54 mm | - |
| Number of Rows | 1 Row | 1 Row | - |
| Termination Style | Through Hole | Through Hole | - |
| Mounting Angle | Straight | Straight | - |
| Contact Plating | Gold | Gold | - |
| Mating Post Length | 8.08 mm | 5.84 mm | - |
| Series | AMPMODU MOD II | AMPMODU MOD II | - |
| Tradename | AMPMODU | AMPMODU | - |
| Packaging | Bulk | Bulk | - |
| Housing Material | Liquid Crystal Polymer (LCP) | Liquid Crystal Polymer (LCP) | - |
| Brand | TE Connectivity / AMP | TE Connectivity / AMP | - |
| Contact Material | Phosphor Bronze | Phosphor Bronze | - |
| Flammability Rating | UL 94 V-0 | UL 94 V-0 | - |
| Row Spacing | 2.54 mm | 2.54 mm | - |
| Product Type | Headers & Wire Housings | Headers & Wire Housings | - |
| Factory Pack Quantity | 100 | 100 | - |
| Subcategory | Headers & Wire Housings | Headers & Wire Housings | - |
| Part # Aliases | 4-1977948-0 | 4-1977950-0 | - |