| PartNumber | FZT491AQTA | FZT491ATA | FZT491TA |
| Description | Bipolar Transistors - BJT Pwr Mid Perf Transistor | Bipolar Transistors - BJT NPN Medium Power | Bipolar Transistors - BJT NPN Medium Power |
| Manufacturer | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| Product Category | Bipolar Transistors - BJT | Bipolar Transistors - BJT | Bipolar Transistors - BJT |
| Technology | Si | - | - |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOT-223-3 | SOT-223-4 | SOT-223-4 |
| Transistor Polarity | NPN | NPN | NPN |
| Configuration | Single | Single | Single |
| Collector Emitter Voltage VCEO Max | 40 V | 40 V | 60 V |
| Collector Base Voltage VCBO | 40 V | 40 V | 80 V |
| Emitter Base Voltage VEBO | 7 V | 5 V | 5 V |
| Collector Emitter Saturation Voltage | 0.5 V | 0.5 V | 160 mV |
| Gain Bandwidth Product fT | 150 MHz | 150 MHz | 150 MHz |
| Minimum Operating Temperature | - 55 C | - 55 C | - 55 C |
| Maximum Operating Temperature | + 150 C | + 150 C | + 150 C |
| DC Current Gain hFE Max | 900 | 300 | - |
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| Continuous Collector Current | 1 A | 1 A | 1 A |
| Pd Power Dissipation | 3 W | 2 W | 2 W |
| Product Type | BJTs - Bipolar Transistors | BJTs - Bipolar Transistors | BJTs - Bipolar Transistors |
| Qualification | AEC-Q101 | - | - |
| Factory Pack Quantity | 1000 | 1000 | 1000 |
| Subcategory | Transistors | Transistors | Transistors |
| RoHS | - | Y | Y |
| Maximum DC Collector Current | - | 1 A | 1 A |
| Series | - | FZT491 | FZT491 |
| Height | - | 1.65 mm | 1.65 mm |
| Length | - | 6.7 mm | 6.7 mm |
| Packaging | - | Reel | Reel |
| Width | - | 3.7 mm | 3.7 mm |
| 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 | - |
| Unit Weight | - | 0.003951 oz | 0.003951 oz |