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| Part Number | BD681STU |
| Datasheet | BD681STU datasheet |
| Description | TRANS NPN DARL 100V 4A TO-126 |
| Manufacturer | ON Semiconductor |
| Series | - |
| Part Status | Active |
| Transistor Type | NPN - Darlington |
| Current - Collector (Ic) (Max) | 4A |
| Voltage - Collector Emitter Breakdown (Max) | 100V |
| Vce Saturation (Max) @ Ib, Ic | 2.5V @ 30mA, 1.5A |
| Current - Collector Cutoff (Max) | 500µA |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 750 @ 1.5A, 3V |
| Power - Max | 40W |
| Frequency - Transition | - |
| Operating Temperature | 150°C (TJ) |
| Mounting Type | Through Hole |
| Package / Case | TO-225AA, TO-126-3 |
| Supplier Device Package | TO-126-3 |