| Part Number | FDB8444 | FDB8441 | 
|---|---|---|
| Manufacturer | onsemi | onsemi | 
| Category | Transistors - FETs, MOSFETs - Single | Transistors - FETs, MOSFETs - Single | 
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| Product Status | Last Time Buy | Last Time Buy | 
| FET Type | N-Channel | N-Channel | 
| Technology | MOSFET (Metal Oxide) | MOSFET (Metal Oxide) | 
| Drain to Source Voltage (Vdss) | 40 V | 40 V | 
| Current - Continuous Drain (Id) @ 25°C | 70A (Tc) | 28A (Ta), 120A (Tc) | 
| Drive Voltage (Max Rds On, Min Rds On) | 10V | 10V | 
| Rds On (Max) @ Id, Vgs | 5.5mOhm @ 70A, 10V | 2.5mOhm @ 80A, 10V | 
| Vgs(th) (Max) @ Id | 4V @ 250µA | 4V @ 250µA | 
| Gate Charge (Qg) (Max) @ Vgs | 128 nC @ 10 V | 280 nC @ 10 V | 
| Vgs (Max) | ±20V | ±20V | 
| Input Capacitance (Ciss) (Max) @ Vds | 8035 pF @ 25 V | 15000 pF @ 25 V | 
| FET Feature | - | - | 
| Power Dissipation (Max) | 167W (Tc) | 300W (Tc) | 
| Operating Temperature | -55°C ~ 175°C (TJ) | -55°C ~ 175°C (TJ) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Supplier Device Package | D²PAK (TO-263) | D²PAK (TO-263) | 
| Package / Case | TO-263-3, D²Pak (2 Leads + Tab), TO-263AB | TO-263-3, D²Pak (2 Leads + Tab), TO-263AB |