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| PartNumber | FMMT634QTA | FMMT634TA | FMMT634 |
| Description | Bipolar Transistors - BJT SS Mid-Perf Transistor | Darlington Transistors NPN Darlington | |
| Manufacturer | Diodes Incorporated | Diodes Incorporated | - |
| Product Category | Bipolar Transistors - BJT | Darlington Transistors | - |
| Technology | Si | - | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | SOT-23-3 | SOT-23 | - |
| Transistor Polarity | NPN | NPN | - |
| Configuration | Dual | Single | - |
| Collector Emitter Voltage VCEO Max | 100 V | 100 V | - |
| Collector Base Voltage VCBO | 120 V | 120 V | - |
| Emitter Base Voltage VEBO | 12 V | 12 V | - |
| Collector Emitter Saturation Voltage | 0.85 V | - | - |
| Maximum DC Collector Current | 900 mA | 0.9 A | - |
| Gain Bandwidth Product fT | 140 MHz | - | - |
| Minimum Operating Temperature | - 55 C | - 55 C | - |
| Maximum Operating Temperature | + 150 C | + 150 C | - |
| Packaging | Reel | Reel | - |
| Brand | Diodes Incorporated | Diodes Incorporated | - |
| Continuous Collector Current | 900 mA | 0.9 A | - |
| DC Collector/Base Gain hfe Min | 20000 | 20000 at 100 mA at 5 V, 15000 at 1 A at 5 V, 5000 at 2 A at 5 V | - |
| Pd Power Dissipation | 806 mW | 625 mW | - |
| Product Type | BJTs - Bipolar Transistors | Darlington Transistors | - |
| Qualification | AEC-Q101 | - | - |
| Factory Pack Quantity | 3000 | 3000 | - |
| Subcategory | Transistors | Transistors | - |
| RoHS | - | Y | - |
| Maximum Collector Cut off Current | - | 0.01 uA | - |
| Series | - | FMMT63 | - |
| DC Current Gain hFE Max | - | 20000 | - |
| Height | - | 1 mm | - |
| Length | - | 3.05 mm | - |
| Width | - | 1.4 mm | - |
| Unit Weight | - | 0.000282 oz | - |