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IRL3803

IRL3803 Description

The IRL3803 from Infineon Technologies is a N-channel HEXFET® MOSFET designed for high-power switching applications. With a 30V drain-to-source voltage (Vdss) and 140A continuous drain current (Id), it delivers robust performance in demanding circuits. Its ultra-low on-resistance (Rds(on)) of just 6mΩ at 10V Vgs ensures minimal conduction losses, making it highly efficient for power management. Though marked as obsolete, its specifications remain competitive for legacy designs requiring high current handling in a TO-220AB through-hole package.

IRL3803 Features

• High Current Capacity: Supports 140A (Tc) at 25°C, ideal for heavy-load applications.
• Low Rds(on): 6mΩ @ 71A, 10V Vgs reduces heat dissipation and improves efficiency.
• Fast Switching: Gate charge (Qg) of 140nC @ 4.5V and input capacitance (Ciss) of 5000pF ensure quick transitions.
• Wide Vgs Range: ±16V maximum gate-source voltage offers flexibility in drive circuitry.
• Thermal Performance: 200W power dissipation (Tc) enables reliable operation under high thermal stress.
• Robust Construction: TO-220AB package provides mechanical durability and ease of heatsinking.

IRL3803 Applications

• Power Supplies: Efficient DC-DC converters and voltage regulators.
• Motor Control: High-current drivers for industrial and automotive systems.
• Battery Management: Load switching in high-capacity Li-ion/power tool packs.
• Inverters/Converters: Used in UPS, solar inverters, and welding equipment.
• Automotive Systems: Ideal for 12/24V applications like starter relays or LED drivers.

Conclusion of IRL3803

The IRL3803 excels in high-current, low-loss switching scenarios, leveraging Infineon’s HEXFET® technology for reliability. While obsolete, its low Rds(on), high Id rating, and thermal resilience make it a viable choice for legacy or cost-sensitive designs. Engineers valuing efficiency, durability, and ease of integration in through-hole packages will find it suitable for power electronics, automotive, and industrial systems. For modern alternatives, consider Infineon’s latest MOSFETs with improved specs.