MOSFET Electronic Switch Module | Optocoupler Isolated DC Control
MOSFET Electronic Switch Module | Optocoupler Isolated DC Control
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Short Product Description
Short Product Description
The F5305S MOSFET Electronic Switch Module provides safe, isolated control of high-power DC devices using low-voltage signals. Featuring full optocoupler isolation, it accepts 3V-24V trigger signals from microcontrollers like Arduino or PLCs to control loads up to 36V and 5A (up to 20A with a heatsink). Perfect for driving DC motors, LED strips, micro water pumps, and solenoid valves with PWM support. Available in-stock at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po.
Key Features
Key Features
- Optocoupler Isolation: Completely separates the low-voltage control signal from the high-power output, protecting your microcontroller from voltage spikes.
- Wide Trigger Range: Accepts digital high/low signals from 3V to 24V, making it compatible with 3.3V/5V Arduino logic and 24V industrial PLCs.
- High Power Output: Controls DC devices from 5V to 36V. Handles up to 5A bare, or up to 20A with an added heatsink.
- PWM Compatible: Supports Pulse Width Modulation for precise motor speed control and LED dimming.
- Original F5305S MOSFET: Utilizes a genuine, high-quality power MOSFET for reliable, low-resistance switching.
- Screw Terminal Blocks: Features heavy-duty green screw terminals for secure, solderless wire connections.
Full Product Description
Full Product Description
Safe and Isolated High-Power DC Control
This electronic switch module is engineered to safely bridge the gap between delicate low-voltage microcontrollers and high-power DC equipment. Utilizing a high-quality optocoupler, the input trigger signal is completely electrically isolated from the output load. This prevents dangerous voltage spikes or back-EMF from heavy inductive loads (like motors or solenoids) from feeding back and destroying your Arduino, Raspberry Pi, or PLC.
Versatile F5305S MOSFET with PWM Support
At the heart of this module is the original F5305S power MOSFET, capable of handling output voltages from 5V to 36V. Out of the box, it can comfortably drive continuous loads up to 5A without any active cooling. For extreme applications, adding a heatsink allows it to handle up to 20A. Furthermore, the module fully supports PWM (Pulse Width Modulation) input, allowing you to smoothly control the speed of DC motors or precisely dim high-power LED strips.
Technician Tip
When wiring this module, pay close attention to the trigger logic. If you connect the signal positive terminal permanently to VCC, the module will trigger on a low-level (Ground) signal. Conversely, if you connect the signal negative terminal permanently to Ground, it will trigger on a high-level signal. If you plan to drive inductive loads like motors or solenoids near the 5A limit, we highly recommend adding a flyback diode across the load and attaching a small aluminum heatsink to the MOSFET. Visit our physical store at Sun Cheong Computer Co. Ltd. in Sham Shui Po to pick up compatible heatsinks and wiring accessories.
Technical Specifications
Technical Specifications
- Main Component: Original F5305S Power MOSFET
- Isolation Type: Optocoupler Isolation
- Input Signal Voltage: 3V - 24V DC (Digital High/Low Level)
- Input Signal Current: Approx. 5mA
- Output Controlled Voltage: 5V - 36V DC
- Output Current: Up to 5A (Without heatsink) / Up to 20A (With adequate heatsink)
- PWM Support: Yes (For motor speed and LED brightness control)
- Dimensions: 46mm x 25.5mm x 14mm
Delivery Options
Delivery Options
- Local delivery within Hong Kong and in-store pickup.
- Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
- Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
- Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
- In-store pickup details (location and time) will be confirmed by email or phone message.
- Delivery times are estimates and may be affected by weather or unforeseen circumstances.
FAQ Section
FAQ Section
Can I control this module directly with a 3.3V Raspberry Pi or ESP32?
Yes, the input signal voltage range is 3V to 24V. A 3.3V logic signal from a Raspberry Pi or ESP32 is perfectly sufficient to trigger the optocoupler and activate the MOSFET switch.
Do I need to add a heatsink to the MOSFET?
If your continuous load draws less than 5A, the module will operate safely without a heatsink. However, if you are driving heavy loads between 5A and 20A, you must attach an appropriately sized aluminum heatsink to the F5305S MOSFET to prevent thermal failure.
Can this module control AC power (like a wall outlet)?
No, this module uses a DC MOSFET and is strictly designed for controlling Direct Current (DC) loads between 5V and 36V. Attempting to switch AC mains power will instantly destroy the module and pose a severe safety hazard. Use a mechanical relay or SSR for AC loads.
How do I configure it for High-Level or Low-Level triggering?
The module has separate terminals for Signal Positive and Signal Negative. If you wire Signal Negative to Ground, applying a High voltage to Signal Positive will trigger the switch. If you wire Signal Positive to VCC, applying a Low (Ground) signal to Signal Negative will trigger it.
Is this MOSFET switch module available at your Sham Shui Po store?
Yes, we stock this F5305S MOSFET isolated switch module at our Sham Shui Po physical store. You can order it online for delivery or visit us during business hours for immediate pickup.
Target Users / Applications
Target Users / Applications
- Arduino/Raspberry Pi Makers: Safely controlling high-current 12V/24V DC motors or water pumps without risking damage to the 5V microcontroller.
- Industrial Automation Techs: Using 24V PLC signals to switch heavy DC solenoid valves in manufacturing setups.
- Custom Lighting Installers: Utilizing the PWM capability to create smooth, high-power dimming effects for long 12V/24V LED strips.
- Smart Home DIYers: Building automated irrigation systems by controlling 12V micro water pumps via ESP8266/ESP32 Wi-Fi modules.
