| PartNumber | IFN3957 | IFN3954 | IFN3956 |
| Description | JFET N-Channel JFET 50mA | JFET N-Channel JFET 50mA | JFET N-Channel JFET 50mA |
| Manufacturer | InterFET | InterFET | InterFET |
| Product Category | JFET | JFET | JFET |
| RoHS | Y | Y | Y |
| Package / Case | TO-71-6 | TO-71-6 | TO-71-6 |
| Series | IFN39 | IFN39 | IFN39 |
| Packaging | Bulk | Bulk | Bulk |
| Type | JFET | JFET | JFET |
| Brand | InterFET | InterFET | InterFET |
| Factory Pack Quantity | 1 | 1 | 1 |
| Part # Aliases | 2N3957 | 2N3954 | 2N3956 |