| PartNumber | 2SC4957-T1-A | 2SC4957-A | 2SC4953 |
| Description | RF Bipolar Transistors NPN High Frequency | RF Bipolar Transistors NPN Silicon 12GHz NF 1.5dB | TRANS NPN 400V 3A TO-220D |
| Manufacturer | CEL | CEL | PANASONIC |
| Product Category | RF Bipolar Transistors | Transistors - Bipolar (BJT) - RF | Transistors (BJT) - Single |
| RoHS | Y | - | - |
| Technology | Si | - | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | MiniMold-4 | - | - |
| Packaging | Reel | Cut Strip | - |
| Height | 1.1 mm | - | - |
| Length | 2.9 mm | - | - |
| Width | 1.5 mm | - | - |
| Brand | CEL | - | - |
| Product Type | RF Bipolar Transistors | - | - |
| Factory Pack Quantity | 3000 | - | - |
| Subcategory | Transistors | - | - |
| Part # Aliases | NE68539-T1-A | - | - |
| Series | - | - | - |
| Part Aliases | - | NE68539-A | - |
| Package Case | - | TO-253-4, TO-253AA | - |
| Mounting Type | - | Surface Mount | - |
| Supplier Device Package | - | - | - |
| Power Max | - | 180mW | - |
| Transistor Type | - | NPN | - |
| Current Collector Ic Max | - | 30mA | - |
| Voltage Collector Emitter Breakdown Max | - | 6V | - |
| DC Current Gain hFE Min Ic Vce | - | 75 @ 10mA, 3V | - |
| Frequency Transition | - | 12GHz | - |
| Noise Figure dB Typ f | - | 1.5dB @ 2GHz | - |
| Gain | - | 11dB | - |