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| Part Number | 4-102978-0-21 | 4-102978-0-22 | 4-102978-0-23 | 4-102978-0-24 | 4-102978-0-25 | 4-102978-0-26 | 4-102978-0-27 | 4-102978-0-28 | 4-102978-0-29 | 4-102978-0-31 | 4-102979-0-21 | 4-102976-0-21 | 4-102977-0-21 | 4-102978-0-01 | 4-102978-0-11 | 4-102978-0-20 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors |
| Product Status | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | Active | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key |
| Connector Type | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway | Header, Breakaway |
| Contact Type | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin | Male Pin |
| Pitch - Mating | 0.100" (2.54mm) | 0.100" (2.54mm) | 0.100" (2.54mm) | 0.100" (2.54mm) | 0.100" (2.54mm) | 0.100" (2.54mm) | 0.100" (2.54mm) | 0.100" (2.54mm) | 0.100" (2.54mm) | 0.100" (2.54mm) | 0.100" (2.54mm) | 0.100" (2.54mm) | 0.100" (2.54mm) | - | 0.100" (2.54mm) | 0.100" (2.54mm) |
| Number of Positions | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 31 | 42 | 21 | 42 | 1 | 11 | 20 |
| Number of Rows | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 2 | 1 | 1 | 1 |
| Row Spacing - Mating | - | - | - | - | - | - | - | - | - | - | 0.100" (2.54mm) | - | 0.100" (2.54mm) | - | - | - |
| Number of Positions Loaded | All | All | All | All | All | All | All | All | All | All | All | All | All | All | All | All |
| Style | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable | Board to Board or Cable |
| Shrouding | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded | Unshrouded |
| Mounting Type | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole | Through Hole | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole, Right Angle |
| Termination | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder |
| Fastening Type | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull |
| Contact Length - Mating | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) |
| Contact Length - Post | 0.110" (2.79mm) | 0.110" (2.79mm) | 0.110" (2.79mm) | 0.110" (2.79mm) | 0.110" (2.79mm) | 0.110" (2.79mm) | 0.110" (2.79mm) | 0.110" (2.79mm) | 0.110" (2.79mm) | 0.110" (2.79mm) | 0.110" (2.79mm) | 0.125" (3.18mm) | 0.125" (3.18mm) | 0.110" (2.79mm) | 0.110" (2.79mm) | 0.110" (2.79mm) |
| Overall Contact Length | - | - | - | - | - | - | - | - | - | - | - | 0.533" (13.55mm) | 0.533" (13.55mm) | - | - | - |
| Insulation Height | 0.138" (3.50mm) | 0.138" (3.50mm) | 0.138" (3.50mm) | 0.138" (3.50mm) | 0.138" (3.50mm) | 0.138" (3.50mm) | 0.138" (3.50mm) | 0.138" (3.50mm) | 0.138" (3.50mm) | 0.138" (3.50mm) | 0.238" (6.05mm) | 0.090" (2.29mm) | 0.090" (2.29mm) | 0.138" (3.50mm) | 0.138" (3.50mm) | 0.138" (3.50mm) |
| Contact Shape | Square | Square | Square | Square | Square | Square | Square | Square | Square | Square | Square | Square | Square | Square | Square | Square |
| Contact Finish - Mating | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold |
| Contact Finish Thickness - Mating | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) |
| Contact Finish - Post | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead | Tin-Lead |
| Contact Material | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy | Copper Alloy |
| Insulation Material | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic | Thermoplastic |
| Features | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Operating Temperature | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C | -65°C ~ 105°C |
| Ingress Protection | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Material Flammability Rating | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 |
| Insulation Color | Black | Black | Black | Black | Black | Black | Black | Black | Black | Black | Black | Black | Black | Black | Black | Black |
| Current Rating (Amps) | 3A | 3A | 3A | 3A | 3A | 3A | 3A | 3A | 3A | 3A | 3A | 3A | 3A | 3A | 3A | 3A |
| Voltage Rating | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
