LR7843 High-Power MOSFET Trigger Switch Module 30V

Description

LR7843 High-Power MOSFET Trigger Switch Module 30V

Specifications for a LR7843 High-Power MOSFET Trigger Switch Module (30 V):

📦 General Information

• MOSFET type: LR7843 (N-channel, logic-level)

• Module type: High-power MOSFET trigger switch

• Control type: Low-level or high-level trigger (logic input)

• Application: Switching high-current DC loads using microcontroller logic signals

⚡ Electrical Characteristics (MOSFET: LR7843)

• Drain-Source Voltage (Vds): 30 V max

• Continuous Drain Current (Id):

  • Up to 100 A (with adequate heatsinking)

  • Practical limit on module PCB: ~10–15 A continuous without extra cooling

• Rds(on):

  • ~1.7 mΩ at Vgs = 10 V

  • ~2.5 mΩ at Vgs = 4.5 V

• Gate Threshold Voltage (Vgs(th)): 1–3 V

• Pulsed Drain Current: 300 A max (very short pulses)

• Gate Voltage (Vgs) range: ±20 V

📡 Module Control Characteristics

• Control voltage: 3.3 V or 5 V logic compatible (direct from Arduino, ESP32, STM32, etc.)

• Trigger type:

  • Low-level trigger: Connect control pin to GND to turn ON load

  • High-level trigger: Connect control pin to Vcc to turn ON load (depends on board version)

• Power supply for control circuit (Vcc): Usually same as logic voltage (3.3–5 V)

🌡 Environmental Ratings

• Operating temperature: −55 °C to +150 °C (MOSFET junction)

• Storage temperature: −55 °C to +150 °C

🔧 Typical Applications

• Driving high-current DC motors

• Switching LED strips or other resistive loads

• Controlling heating elements

• Battery-powered projects needing high-efficiency switching

💡 Notes

• The LR7843 MOSFET has extremely low on-resistance, meaning very low heat dissipation at high currents.

• For currents above ~15 A continuous, external heatsink or thicker copper PCB is strongly recommended.

• Be sure to include a flyback diode when switching inductive loads (motors, solenoids, relays).