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| PartNumber | BULK128D-B | BULK128 | BULK128D |
| Description | Bipolar Transistors - BJT High Voltage NPN 700V PWR Trans | Bipolar Transistors - BJT HI-VOLT FAST SWITCH NPN PWR TRANSISTR | |
| Manufacturer | STMicroelectronics | STMicroelectronics | - |
| Product Category | Bipolar Transistors - BJT | Bipolar Transistors - BJT | - |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | SOT-82-3 | SOT-82-3 | - |
| Transistor Polarity | NPN | NPN | - |
| Configuration | Single | Single | - |
| Collector Emitter Voltage VCEO Max | 400 V | 400 V | - |
| Collector Base Voltage VCBO | 700 V | - | - |
| Emitter Base Voltage VEBO | 9 V | 9 V | - |
| Maximum DC Collector Current | 4 A | 4 A | - |
| Minimum Operating Temperature | - 65 C | - 65 C | - |
| Maximum Operating Temperature | + 150 C | + 150 C | - |
| Series | BULK128 | BULK128 | - |
| Height | 10.8 mm (Max) | 10.8 mm | - |
| Length | 7.8 mm (Max) | 7.8 mm | - |
| Packaging | Tube | Tube | - |
| Width | 2.7 mm (Max) | 2.7 mm | - |
| Brand | STMicroelectronics | STMicroelectronics | - |
| Pd Power Dissipation | 55000 mW | 55 W | - |
| Product Type | BJTs - Bipolar Transistors | BJTs - Bipolar Transistors | - |
| Factory Pack Quantity | 4000 | 50 | - |
| Subcategory | Transistors | Transistors | - |
| Unit Weight | 0.070548 oz | - | - |
| Continuous Collector Current | - | 4 A | - |