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| Part Number | FQP18N50V2 | FQP18N20V2 | 
|---|---|---|
| Manufacturer | Fairchild Semiconductor | onsemi | 
| Product Status | Obsolete | Obsolete | 
| FET Type | N-Channel | N-Channel | 
| Technology | MOSFET (Metal Oxide) | MOSFET (Metal Oxide) | 
| Drain to Source Voltage (Vdss) | 500 V | 200 V | 
| Current - Continuous Drain (Id) @ 25°C | 18A (Tc) | 18A (Tc) | 
| Drive Voltage (Max Rds On, Min Rds On) | 10V | 10V | 
| Rds On (Max) @ Id, Vgs | 265mOhm @ 9A, 10V | 140mOhm @ 9A, 10V | 
| Vgs(th) (Max) @ Id | 5V @ 250µA | 5V @ 250µA | 
| Gate Charge (Qg) (Max) @ Vgs | 55 nC @ 10 V | 26 nC @ 10 V | 
| Vgs (Max) | ±30V | ±30V | 
| Input Capacitance (Ciss) (Max) @ Vds | 3290 pF @ 25 V | 1080 pF @ 25 V | 
| FET Feature | - | - | 
| Power Dissipation (Max) | 208W (Tc) | 123W (Tc) | 
| Operating Temperature | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) | 
| Mounting Type | Through Hole | Through Hole | 
| Supplier Device Package | TO-220-3 | TO-220-3 | 
| Package / Case | TO-220-3 | TO-220-3 |