12V Solenoid Valve - Normally Closed Electric Valve
12V Solenoid Valve
This 12V solenoid valve is an electromechanical device that opens when energized with direct current, allowing liquids or gases to pass through. Normally closed, it blocks flow until powered, making it ideal for automated dispensing, irrigation, and fluid control projects. Its sturdy build and consistent switching ensure reliable operation in maker environments.
Key Specifications
| Specification | Value |
|---|---|
| Rated voltage | 12V DC |
| Operation mode | Normally closed (open when energized) |
| Typical current | 400 mA (±20%) |
| Inlet / outlet threads | 1/2" BSP (G1/2) |
| Pressure range | 0 – 0.8 MPa (0 – 8 bar) |
| Body material | Brass with nylon-sealed coil |
What You Can Build With This
- Automatic plant watering system controlled by a soil moisture sensor and Arduino.
- Smart aquarium water changer that drains and refills on a timer.
- Home beverage dispenser with push‑button or RFID activation.
- Pneumatic actuator trigger for soft robotics or workshop automation.
Compatibility
This valve works with Arduino, Raspberry Pi, ESP32, and any 12V DC power source. Use a relay module or a logic‑level MOSFET (like IRLZ44N) for switching, and always place a flyback diode (1N4007) across the coil to suppress voltage spikes. It pairs well with common garden tap adapters (G1/2) and 12V power bricks.
Wiring Notes
Connect one wire to the positive terminal of a 12V supply and the other to the drain of a MOSFET or the COM of a relay. A flyback diode must be soldered reverse‑biased across the solenoid terminals. The coil draws about 400 mA, so use a supply rated for at least 1A and wires no thinner than 22 AWG.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, but a relay or MOSFET driver is required because the Arduino cannot source 400 mA directly. Always add a flyback diode to protect the circuit.
Can it handle hot water?
It performs best with cold water up to 60°C. At higher temperatures, reduce the maximum pressure and check the seal material compatibility.
What thread adapters do I need?
The valve has 1/2" BSP (G1/2) threads. You can use standard brass or plastic G1/2 adapters and hose barbs available in most hardware stores.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
What you can build with this
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items