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| PartNumber | 2N4857A | 2N4857 | 2N4857AE3 |
| Description | JFET 40V N-Ch 40Vdg 40Vgsr 50mA 360mW | JFET JFET N-Channel -30V 1.8W 10mW 50mA | |
| Manufacturer | Central Semiconductor | InterFET | - |
| Product Category | JFET | JFET | - |
| RoHS | Y | Y | - |
| Mounting Style | Through Hole | Through Hole | - |
| Package / Case | TO-18 | TO-18-3 | - |
| Transistor Polarity | N-Channel | N-Channel | - |
| Configuration | Single | Single | - |
| Vds Drain Source Breakdown Voltage | 40 V | 15 V | - |
| Vgs Gate Source Breakdown Voltage | 40 V | - 40 V | - |
| Drain Source Current at Vgs=0 | 20 mA to 100 mA | 100 mA | - |
| Rds On Drain Source Resistance | 40 Ohms | 40 Ohms | - |
| Pd Power Dissipation | 360 mW | 1.8 W | - |
| Minimum Operating Temperature | - 65 C | - | - |
| Maximum Operating Temperature | + 200 C | - | - |
| Series | 2N4857 | 2N485 | - |
| Packaging | Bulk | Bulk | - |
| Type | JFET | JFET | - |
| Brand | Central Semiconductor | InterFET | - |
| Gate Source Cutoff Voltage | 2 V to 6 V | - 6 V | - |
| Maximum Drain Gate Voltage | 40 V | - | - |
| Factory Pack Quantity | 2000 | 1 | - |
| Unit Weight | 0.011020 oz | - | - |
| Technology | - | Si | - |
| Id Continuous Drain Current | - | 500 pA | - |