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| Part Number | BD544C-S | BD545C-S | BD546C-S | BD540C-S | BD543C-S | BD544-S | BD544A-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 | PNP | NPN - Darlington | PNP | PNP | NPN | PNP | PNP |
| Current - Collector (Ic) (Max) | 8 A | 15 A | 15 A | 5 A | 8 A | 8 A | 8 A |
| Voltage - Collector Emitter Breakdown (Max) | 100 V | 100 V | 100 V | 100 V | 100 V | 40 V | 60 V |
| Vce Saturation (Max) @ Ib, Ic | 1V @ 1.6A, 8A | 1V @ 2A, 10A | 1V @ 2A, 10A | 1.5V @ 1A, 5A | 1V @ 1.6A, 8A | 1V @ 1.6A, 8A | 1V @ 1.6A, 8A |
| Current - Collector Cutoff (Max) | 700µA | 700µA | 700µA | 300µA | 700µA | 700µA | 700µA |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 15 @ 5A, 4V | 10 @ 10A, 4V | 10 @ 10A, 4V | 12 @ 3A, 4V | 15 @ 5A, 4V | 15 @ 5A, 4V | 15 @ 5A, 4V |
| Power - Max | 2 W | 3.5 W | 3.5 W | 2 W | 2 W | 2 W | 2 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-218-3 | TO-218-3 | TO-220-3 | TO-220-3 | TO-220-3 | TO-220-3 |
| Supplier Device Package | TO-220 | SOT-93 | SOT-93 | TO-220 | TO-220 | TO-220 | TO-220 |
