| PartNumber | FCX491ATA | FCX491TA | FCX491QTA |
| Description | Bipolar Transistors - BJT NPN Medium Power | Bipolar Transistors - BJT NPN Medium Power | Bipolar Transistors - BJT Pwr Mid Perf Transistor SOT89 T&R 1K |
| Manufacturer | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| Product Category | Bipolar Transistors - BJT | Bipolar Transistors - BJT | Bipolar Transistors - BJT |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOT-89-3 | SOT-89-3 | SOT-89-3 |
| Transistor Polarity | NPN | NPN | NPN |
| Configuration | Single | Single | Single |
| Collector Emitter Voltage VCEO Max | 40 V | 60 V | 60 V |
| Collector Base Voltage VCBO | 40 V | 80 V | 80 V |
| Emitter Base Voltage VEBO | 5 V | 5 V | 7 V |
| Collector Emitter Saturation Voltage | 0.5 V | 0.5 V | 160 mV |
| Maximum DC Collector Current | 1 A | 1 A | 2 A |
| Gain Bandwidth Product fT | 150 MHz | 150 MHz | 150 MHz |
| Minimum Operating Temperature | - 65 C | - 65 C | - 65 C |
| Maximum Operating Temperature | + 150 C | + 150 C | + 150 C |
| Series | FCX49 | FCX49 | - |
| DC Current Gain hFE Max | 300 at 1 mA, 5 V | - | - |
| Height | 1.5 mm | 1.5 mm | - |
| Length | 4.5 mm | 4.5 mm | - |
| Packaging | Reel | Reel | Reel |
| Width | 2.5 mm | 2.5 mm | - |
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| Continuous Collector Current | 1 A | 1 A | 1 A |
| DC Collector/Base Gain hfe Min | 300 at 1 mA, 5 V, 300 at 500 mA, 5 V, 200 at 1 A, 5 V, 35 at 2 A, 5 V | - | 100 at 1 mA, 5 V |
| Pd Power Dissipation | 1 W | 1 W | 2 W |
| Product Type | BJTs - Bipolar Transistors | BJTs - Bipolar Transistors | BJTs - Bipolar Transistors |
| Factory Pack Quantity | 1000 | 1000 | 1000 |
| Subcategory | Transistors | Transistors | Transistors |
| Unit Weight | 0.001834 oz | 0.001834 oz | - |
| Technology | - | - | Si |