| Part Numbers | Manufacturer Name | Datasheet | Transistor Type | Current - Collector (Ic) (Max) | Voltage - Collector Emitter Breakdown (Max) | Vce Saturation (Max) @ Ib, Ic | Current - Collector Cutoff (Max) | DC Current Gain (hFE) (Min) @ Ic, Vce | Power - Max | Frequency - Transition | Mounting Type | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ULQ2804A | STMICROELECTRONICS | 8 NPN Darlington | 500mA | 50V | - | - | 1000 @ 350mA, 2V | 1W | - | Through Hole | 18-DIP (0.300", 7.62mm) | |
| 2N4923 | STMICROELECTRONICS | NPN | 1A | 80V | - | - | - | - | - | Through Hole | TO-225AA, TO-126-3 | |
| ULQ2802A | STMICROELECTRONICS | 8 NPN Darlington | 500mA | - | - | - | 1000 @ 350mA, 2V | 1W | - | Through Hole | 18-DIP (0.300", 7.62mm) | |
| L6221AD | STMICROELECTRONICS | 4 NPN Darlington (Quad) | 1.8A | 50V | - | - | - | 1W | - | Surface Mount | 20-SOIC (0.295", 7.50mm Width) | |
| STD127DT4 | STMICROELECTRONICS | - | - | - | - | - | - | - | - | - | - | |
| BULB903EDT4 | STMICROELECTRONICS | NPN | - | - | - | - | - | - | - | - | - | |
| BULD128DT4 | STMICROELECTRONICS | NPN | - | - | - | - | - | - | - | Surface Mount | TO-252-3, DPak (2 Leads + Tab), SC-63 | |
| MJE521 | STMICROELECTRONICS | NPN | 4A | 40V | - | - | 40 @ 1A, 1V | 40W | - | Through Hole | TO-225AA, TO-126-3 | |
| ST5027 | STMICROELECTRONICS | NPN | 3A | 800V | - | - | - | 90W | - | Through Hole | TO-220-3 | |
| BD434 | STMICROELECTRONICS | - | - | - | - | - | - | - | - | - | - |
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