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| Part Number | 2N4858UB |
| Description | JFET N-CHAN 40V 3SMD |
| Manufacturer | Microsemi Corporation |
| Series | - |
| Part Status | Active |
| FET Type | N-Channel |
| Voltage - Breakdown (V(BR)GSS) | 40V |
| Drain to Source Voltage (Vdss) | 40V |
| Current - Drain (Idss) @ Vds (Vgs=0) | 8mA @ 15V |
| Current Drain (Id) - Max | - |
| Voltage - Cutoff (VGS off) @ Id | - |
| Input Capacitance (Ciss) (Max) @ Vds | 18pF @ 10V (VGS) |
| Resistance - RDS(On) | 60 Ohms |
| Power - Max | 360mW |
| Operating Temperature | -65°C ~ 200°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | 3-SMD, No Lead |
| Supplier Device Package | 3-UB (3.09x2.45) |