Description
IRLR7843 30V 161A 140W SMD MOSFET Transistors N-Channel TO-252-2(DPAK)
Description
The IRLR7843 is a logic-level N-channel MOSFET designed for low-voltage, high-current applications. It features a very low R<sub>DS(on)</sub>, high current capability, and is optimized for use with logic-level gate drive (as low as 4.5V). Packaged in DPAK / TO-252, it is ideal for DC-DC converters, motor control, battery-powered circuits, and synchronous rectification.
Specifications
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Type: N-Channel MOSFET (Logic-Level)
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Package: TO-252 / DPAK (SMD)
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Drain-Source Voltage (V<sub>DSS</sub>): 30 V
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Continuous Drain Current (I<sub>D</sub>):
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Pulsed Drain Current (I<sub>DM</sub>): 310 A
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Gate-Source Voltage (V<sub>GS</sub>): ±16 V
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R<sub>DS(on)</sub> (max):
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2.5 mΩ @ V<sub>GS</sub> = 4.5 V, I<sub>D</sub> = 20 A
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1.7 mΩ @ V<sub>GS</sub> = 10 V, I<sub>D</sub> = 30 A
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Total Gate Charge (Q<sub>g</sub>): 67 nC (typical @ V<sub>GS</sub> = 10 V)
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Power Dissipation (P<sub>D</sub>): 96 W (T<sub>C</sub> = 25 °C)
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Junction Temperature (T<sub>j</sub>): −55 °C to +175 °C
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Thermal Resistance (R<sub>θJC</sub>): 1.56 °C/W
Key Features
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Logic-level gate drive (works directly with 5V microcontrollers like Arduino, ESP32, STM32, etc.)
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Ultra-low R<sub>DS(on)</sub> for high efficiency
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High current handling (up to 78A continuous, 310A pulsed)
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Rugged and reliable design
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Suitable for high-frequency switching
Applications
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Motor control (DC motors, robotics, drones)
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DC-DC converters and switching regulators
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Battery-powered systems (Li-ion packs, BMS)
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Synchronous rectification in SMPS and inverters
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Power switching and load drivers
This MOSFET is often chosen as a direct replacement for IRLZ44N in compact SMD designs because of its lower R<sub>DS(on)</sub> and higher current handling.
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