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| Part Number | BD681S | BD682S | BD681 | BD681G |
|---|---|---|---|---|
| Manufacturer | Fairchild Semiconductor | onsemi | STMicroelectronics | onsemi |
| Product Status | Active | Obsolete | Active | Active |
| Transistor Type | NPN - Darlington | PNP - Darlington | NPN - Darlington | NPN - Darlington |
| Current - Collector (Ic) (Max) | 4 A | 4 A | 4 A | 4 A |
| Voltage - Collector Emitter Breakdown (Max) | 100 V | 100 V | 100 V | 100 V |
| Vce Saturation (Max) @ Ib, Ic | 2.5V @ 30mA, 1.5A | 2.5V @ 30mA, 1.5A | 2.5V @ 30mA, 1.5A | 2.5V @ 30mA, 1.5A |
| Current - Collector Cutoff (Max) | 500µA | 500µA | 500µA | 500µA |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 750 @ 1.5A, 3V | 750 @ 1.5A, 3V | 750 @ 1.5A, 3V | 750 @ 1.5A, 3V |
| Power - Max | 40 W | 14 W | 40 W | 40 W |
| Frequency - Transition | - | - | - | - |
| Operating Temperature | 150°C (TJ) | 150°C (TJ) | 150°C (TJ) | -55°C ~ 150°C (TJ) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 |
| Supplier Device Package | TO-126-3 | TO-126-3 | SOT-32-3 | TO-126 |
