The LR7843 80A Isolated FET Module is a compact and reliable solid-state switching solution designed for controlling high-current DC loads. Built around the LR7843 MOSFET with optocoupler isolation, this module ensures that control signals remain electrically separated from the power circuit, providing robust interference protection and enhanced safety. It’s an excellent choice for hobbyists, educators, and professionals working on robotics, motor control, automation projects, and PWM-based applications where clean signal isolation and high switching capability are essential.
Key Features:
- Optocoupler Isolation: Control signal and power circuit are electrically isolated, greatly increasing interference immunity and system safety.
- Compatible with MCU and Arduino: Accepts 3V or 5V logic signals, making it ideal for integration with microcontroller projects.
- High-Level Trigger: Activates on high signal, deactivates on low signal, with support for PWM speed regulation.
- Compact Design: Module dimensions of 23mm x 16mm with two 2mm diameter mounting holes spaced 8mm apart for easy installation.
- Flexible Connectivity: Signal input side can be soldered to terminal blocks or pins for breadboard compatibility; output side can be soldered to terminals or direct wire connections.
- Green and Blue Screw Terminals: Colour-coded terminals for power input and output, simplifying wiring and reducing connection errors.
- Wide Application Range: Suitable for controlling motors, solenoid valves, LED strips, and other DC equipment requiring on/off or PWM control.
- MOSFET Specifications: LR7843 rated at 30V and 161A peak current.
- Safe Operating Current: Recommended maximum continuous load of 10A for reliable, long-term operation.
- Low Voltage Drop: Efficient MOSFET switching with minimal heat generation under normal operating conditions.
- Logic Control: High-level start, low-level stop operation for straightforward digital control.
- PWM Capable: Supports pulse-width modulation for variable speed control and dimming applications.
- Onboard Components: Features optocoupler isolation chip, support resistors, and indicator LED for status monitoring.
- Mounting Options: Pre-drilled holes allow secure mounting in enclosures or onto project chassis.
Applications
- Motor Control: Ideal for controlling DC motors in robotics, RC vehicles, and automation systems with PWM speed regulation.
- Solenoid Valve Control: Switch solenoid valves in irrigation systems, pneumatic equipment, and industrial automation.
- LED Strip Control: Manage high-power LED strips with dimming capability through PWM signals.
- DIY Electronics: Perfect for hobbyist projects requiring isolated high-current switching with microcontroller control.
- Educational Use: Excellent teaching tool for demonstrating optocoupler isolation, MOSFET switching, and PWM control principles.
Why Choose the LR7843 80A Isolated FET Module? The LR7843 80A Isolated FET Module combines high switching capacity with essential optocoupler isolation in a compact, easy-to-integrate package. Its compatibility with popular microcontroller platforms, flexible mounting options, and PWM support make it a versatile solution for a wide range of control applications. Whether you’re building a robot, automating your home, or exploring power electronics, this module delivers dependable performance with the safety and reliability your projects deserve.
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