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| Part Number | BD645-S | BD648-S | BD649-S | BD647-S | BD745-S | BD646-S | BD545-S |
|---|---|---|---|---|---|---|---|
| Manufacturer | Bourns Inc. | Bourns Inc. | Bourns Inc. | Bourns Inc. | Bourns Inc. | Bourns Inc. | Bourns Inc. |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Transistor Type | NPN - Darlington | PNP - Darlington | NPN - Darlington | NPN - Darlington | NPN | PNP - Darlington | NPN |
| Current - Collector (Ic) (Max) | 8 A | 8 A | 8 A | 8 A | 20 A | 8 A | 15 A |
| Voltage - Collector Emitter Breakdown (Max) | 60 V | 80 V | 100 V | 80 V | 45 V | 60 V | 40 V |
| Vce Saturation (Max) @ Ib, Ic | 2.5V @ 50mA, 5A | 2.5V @ 50mA, 5A | 2.5V @ 50mA, 5A | 2.5V @ 50mA, 5A | 3V @ 5A, 20A | 2.5V @ 50mA, 5A | 1V @ 2A, 10A |
| Current - Collector Cutoff (Max) | 500µA | 500µA | 500µA | 500µA | 1µA | 500µA | 700µA |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 750 @ 3A, 3V | 750 @ 3A, 3V | 750 @ 3A, 3V | 750 @ 3A, 3V | 20 @ 5A, 4V | 750 @ 3A, 3V | 10 @ 10A, 4V |
| Power - Max | 2 W | 2 W | 2 W | 2 W | 3.5 W | 2 W | 3.5 W |
| Frequency - Transition | - | - | - | - | - | - | - |
| Operating Temperature | -65°C ~ 150°C (TJ) | -65°C ~ 150°C (TJ) | -65°C ~ 150°C (TJ) | -65°C ~ 150°C (TJ) | -65°C ~ 150°C (TJ) | -65°C ~ 150°C (TJ) | -65°C ~ 150°C (TJ) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | TO-220-3 | TO-220-3 | TO-220-3 | TO-220-3 | TO-218-3 | TO-220-3 | TO-218-3 |
| Supplier Device Package | TO-220 | TO-220 | TO-220 | TO-220 | SOT-93 | TO-220 | SOT-93 |
