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| PartNumber | 2N5581 | 2N5581/TR | 2N5578 |
| Description | Bipolar Transistors - BJT Small-Signal BJT | Bipolar Transistors - BJT | |
| Manufacturer | Microchip | Microchip | Microsemi Corporation |
| Product Category | Bipolar Transistors - BJT | Bipolar Transistors - BJT | Transistors (BJT) - Single |
| RoHS | N | N | - |
| Packaging | Foil Bag | Reel | - |
| Brand | Microchip / Microsemi | Microchip / Microsemi | - |
| Product Type | BJTs - Bipolar Transistors | BJTs - Bipolar Transistors | - |
| Factory Pack Quantity | 1 | 100 | - |
| Subcategory | Transistors | Transistors | - |
| Technology | - | Si | - |
| Mounting Style | - | Through Hole | - |
| Package / Case | - | TO-206AB-3 | - |
| Transistor Polarity | - | NPN | - |
| Configuration | - | Single | - |
| Collector Emitter Voltage VCEO Max | - | 50 V | - |
| Collector Base Voltage VCBO | - | 75 V | - |
| Emitter Base Voltage VEBO | - | 6 V | - |
| Collector Emitter Saturation Voltage | - | 0.3 V | - |
| Maximum DC Collector Current | - | 800 mA | - |
| Minimum Operating Temperature | - | - 55 C | - |
| Maximum Operating Temperature | - | + 200 C | - |
| DC Current Gain hFE Max | - | 120 at 150 mA, 10 V | - |
| DC Collector/Base Gain hfe Min | - | 20 at 500 mA, 10 V | - |
| Pd Power Dissipation | - | 2 W | - |
| Series | - | - | - |
| Package Case | - | - | - |
| Mounting Type | - | - | - |
| Supplier Device Package | - | - | - |
| Power Max | - | - | - |
| Transistor Type | - | - | - |
| Current Collector Ic Max | - | - | - |
| Voltage Collector Emitter Breakdown Max | - | - | - |
| DC Current Gain hFE Min Ic Vce | - | - | - |
| Vce Saturation Max Ib Ic | - | - | - |
| Current Collector Cutoff Max | - | - | - |
| Frequency Transition | - | - | - |