| Part Number | FQD3N40TM | FQD6N40TM | 
|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | 
| Category | Transistors - FETs, MOSFETs - Single | Transistors - FETs, MOSFETs - Single | 
|   |   | |
| Product Status | Obsolete | Obsolete | 
| FET Type | N-Channel | N-Channel | 
| Technology | MOSFET (Metal Oxide) | MOSFET (Metal Oxide) | 
| Drain to Source Voltage (Vdss) | 400 V | 400 V | 
| Current - Continuous Drain (Id) @ 25°C | 2A (Tc) | 4.2A (Tc) | 
| Drive Voltage (Max Rds On, Min Rds On) | 10V | 10V | 
| Rds On (Max) @ Id, Vgs | 3.4Ohm @ 1A, 10V | 1.15Ohm @ 2.1A, 10V | 
| Vgs(th) (Max) @ Id | 5V @ 250µA | 5V @ 250µA | 
| Gate Charge (Qg) (Max) @ Vgs | 7.5 nC @ 10 V | 17 nC @ 10 V | 
| Vgs (Max) | ±30V | ±30V | 
| Input Capacitance (Ciss) (Max) @ Vds | 230 pF @ 25 V | 620 pF @ 25 V | 
| FET Feature | - | - | 
| Power Dissipation (Max) | 2.5W (Ta), 30W (Tc) | 2.5W (Ta), 50W (Tc) | 
| Operating Temperature | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Supplier Device Package | TO-252, (D-Pak) | TO-252, (D-Pak) | 
| Package / Case | TO-252-3, DPak (2 Leads + Tab), SC-63 | TO-252-3, DPak (2 Leads + Tab), SC-63 |