| PartNumber | BUT12TU | BUT12ATU |
| Description | Bipolar Transistors - BJT NPN Si Transistor | Bipolar Transistors - BJT NPN Si Transistor |
| Manufacturer | ON Semiconductor | ON Semiconductor |
| Product Category | Bipolar Transistors - BJT | Bipolar Transistors - BJT |
| RoHS | Y | Y |
| Mounting Style | Through Hole | Through Hole |
| Package / Case | TO-220-3 | TO-220-3 |
| Transistor Polarity | NPN | NPN |
| Configuration | Single | Single |
| Collector Emitter Voltage VCEO Max | 400 V | 450 V |
| Collector Base Voltage VCBO | 850 V | 1 kV |
| Maximum DC Collector Current | 8 A | 8 A |
| Minimum Operating Temperature | - 65 C | - 65 C |
| Maximum Operating Temperature | + 150 C | + 150 C |
| Height | 9.4 mm (Max) | 9.4 mm (Max) |
| Length | 10.1 mm (Max) | 10.1 mm (Max) |
| Packaging | Tube | Tube |
| Width | 4.7 mm (Max) | 4.7 mm (Max) |
| Brand | ON Semiconductor / Fairchild | ON Semiconductor / Fairchild |
| Continuous Collector Current | 8 A | 8 A |
| Pd Power Dissipation | 100 W | 100 W |
| Product Type | BJTs - Bipolar Transistors | BJTs - Bipolar Transistors |
| Factory Pack Quantity | 50 | 50 |
| Subcategory | Transistors | Transistors |
| Unit Weight | 0.080072 oz | 0.080072 oz |
| Collector Emitter Saturation Voltage | - | 1.5 V |