Submersible 3V Mini DC Water Pump with Wire

Submersible 3V Mini DC Water Pump with Wire is an ultra-compact, quiet, low-power centrifugal water pump designed for low-voltage fluid transfer applications. Engineered to operate entirely submerged underwater, this micro pump utilizes a brushless DC motor driver that delivers reliable water flow with minimal power consumption and noise. Its small form factor, integrated connecting wires, and low operating voltage (2.5V to 6V DC) make it an essential component for automated plant watering systems, aquaponics, mini fountains, electronic bidets, and microcontroller-driven IoT irrigation projects.

Features

• Ultra-compact submersible design operating silently underwater
• Low operating voltage (2.5V to 6V DC), easily powered by 3.7V 18650 batteries or 5V USB supplies
• Efficient brushless DC motor core ensuring low power draw and long continuous operation
• Pre-attached insulated lead wires for rapid connection to breadboards or relay modules
• Smooth liquid flow rate capable of pumping up to 80–120 liters per hour
• Fully waterproof epoxy-encapsulated motor housing preventing water ingress and short circuits
• Removable front filter nozzle for easy cleaning and debris removal
• Seamless integration with microcontrollers (Arduino, ESP32, ESP8266) via transistor/relay switches or driver boards

Applications

• Automatic smart plant watering and drip irrigation systems (soil moisture sensor activated)
• Desktop mini aquariums, fish tanks, and pet water fountains
• Hydroponics, aquaponics, and indoor vertical farming prototypes
• Solar-powered water circulation and miniature decorative water fountains
• Cooling fluid pumps for DIY thermoelectric (Peltier) refrigeration units
• Academic, polytechnic diploma, and university engineering IoT and robotics projects

Important Notes:

• Submersion Required: Always submerge the pump completely in water before applying power; running the pump dry (without water) creates friction heat that rapidly damages the internal impeller and motor bearings.
• This pump is designed for clean freshwater; avoid pumping thick fluids, acids, or liquids with suspended particles that could clog the impeller.
• Observe correct DC polarity (Red wire = Positive +, Black wire = Negative -); reverse polarity will cause the impeller to rotate backward or fail to pump water effectively.
• Do not connect this pump directly to AC mains power; use a regulated 3V–5V DC power source, battery pack, or motor driver circuit.
• Control the pump using a MOSFET (e.g., IRF520 module), NPN transistor (TIP120/2N2222), or relay module when interfacing with Arduino or ESP32 GPIO pins.

Package includes

• 1 x Submersible 3V Mini DC Water Pump with Pre-attached Wire