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| PartNumber | 4-1977960-0 | 4-1977964-0 | 4-1977961-0 |
| Description | Headers & Wire Housings 40 MODII HDR SRRA B/A 30 PD/NI .100CL | Headers & Wire Housings 40 MODII HD SRRA B/A 30 PD/NI 100 W/HDLF | CONN HEADER R/A 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 | Right Angle | Right Angle | - |
| Contact Plating | Gold | Gold | - |
| Mating Post Length | 5.84 mm | 8.08 mm | - |
| Series | AMPMODU MOD II | AMPMODU MOD II | - |
| Tradename | AMPMODU | AMPMODU | - |
| Packaging | Bulk | Bulk | - |
| Housing Material | Thermoplastic | Thermoplastic | - |
| 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 | 25 | 25 | - |
| Subcategory | Headers & Wire Housings | Headers & Wire Housings | - |
| Part # Aliases | 4-1977960-0 | 4-1977964-0 | - |