| Part Number | IRF830B | IRF840B | 
|---|---|---|
| Manufacturer | Fairchild Semiconductor | onsemi | 
| Category | Transistors - FETs, MOSFETs - Single | Transistors - FETs, MOSFETs - Single | 
|   |   | |
| Product Status | Active | Obsolete | 
| FET Type | N-Channel | N-Channel | 
| Technology | MOSFET (Metal Oxide) | MOSFET (Metal Oxide) | 
| Drain to Source Voltage (Vdss) | 500 V | 500 V | 
| Current - Continuous Drain (Id) @ 25°C | 4.5A (Tc) | 8A (Tc) | 
| Drive Voltage (Max Rds On, Min Rds On) | 10V | 10V | 
| Rds On (Max) @ Id, Vgs | 1.5Ohm @ 2.25A, 10V | 800mOhm @ 4A, 10V | 
| Vgs(th) (Max) @ Id | 4V @ 250µA | 4V @ 250µA | 
| Gate Charge (Qg) (Max) @ Vgs | 35 nC @ 10 V | 53 nC @ 10 V | 
| Vgs (Max) | ±30V | ±30V | 
| Input Capacitance (Ciss) (Max) @ Vds | 1050 pF @ 25 V | 1800 pF @ 25 V | 
| FET Feature | - | - | 
| Power Dissipation (Max) | 73W (Tc) | 134W (Tc) | 
| Operating Temperature | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) | 
| Mounting Type | Through Hole | Through Hole | 
| Supplier Device Package | TO-220 | TO-220-3 | 
| Package / Case | TO-220-3 | TO-220-3 |