1. Product Overview
This manual provides instructions for the EDGELEC 50-piece set of 12 Volt 3mm Red Pre-Wired LED Diodes. These LEDs are designed for ease of use, featuring a built-in resistor and pre-attached wires, making them suitable for various electronic projects and lighting applications.
- Quantity: 50 pieces
- LED Type: 3mm Red, Diffused Colored Lens
- Voltage: DC 12V (with pre-loaded 1/4W metal film resistor)
- Wire Length: Approximately 7.9 inches (20 cm)
- Lifespan: 20,000+ hours
2. Safety Information
- Ensure the power source is DC 12V. Connecting to higher voltages without proper current limiting will damage the LEDs.
- Observe correct polarity: Red wire is Anode (+), Black wire is Cathode (-). Incorrect polarity will prevent the LED from lighting up.
- Do not exceed the specified forward current of 20mA. Although a resistor is built-in for 12V operation, always verify your circuit.
- LEDs can generate some heat during operation. Ensure adequate ventilation if used in enclosed spaces.
- Keep out of reach of children.
3. Setup and Installation
These pre-wired LEDs simplify installation by including a current-limiting resistor and wire leads.
- Identify Wires: The red wire is the positive terminal (Anode), and the black wire is the negative terminal (Cathode).
- Connect to Power Source: Connect the red wire to the positive (+) terminal of your 12V DC power supply and the black wire to the negative (-) terminal.
- Secure Connections: Ensure all connections are secure and properly insulated to prevent short circuits. The wire leads are tin-coated at the ends for easier soldering or connection to terminal blocks.
- Mounting: The 3mm LED can be mounted into a 3mm hole. The diffused lens provides a wide viewing angle.
Figure 1: Colored wires for easy polarity identification. The colored wire (e.g., red) is the anode (+), and the black wire is the cathode (-).
Figure 2: Close-up view of a pre-wired LED, showing the integrated 0.25 Watt metal film resistor for stable 12V operation.
Figure 3: Detail of the 7.8-inch wire lead, featuring 7-core pure copper and tin-coated ends for simplified welding or connection.
4. Operating Instructions
Once properly connected to a 12V DC power source, the LED will illuminate. No further operational steps are required. The built-in resistor ensures the LED operates safely within its specified parameters at 12V.
5. Maintenance
These LEDs are designed for long-term, maintenance-free operation. To ensure optimal performance and longevity:
- Keep the LEDs and connections clean and free from dust or debris.
- Avoid exposing the LEDs to excessive moisture or extreme temperatures outside their operating range.
- Periodically check connections for any signs of wear or corrosion, especially in high-vibration environments.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| LED does not light up | Incorrect polarity No power to the circuit Faulty connection Damaged LED | Verify red wire to (+) and black wire to (-) Check power supply and circuit continuity Inspect and secure all wire connections Replace the LED |
| LED is dim | Insufficient voltage Poor connection | Ensure power supply provides stable 12V DC Check and secure all wire connections |
7. Specifications
| Feature | Specification |
|---|---|
| LED Size | 3mm |
| Light Color | Red |
| Lens Type | Diffused |
| Forward Voltage | DC 12V |
| Forward Current | 20mA |
| Resistor | Built-in 1/4W Metal Film Resistor |
| Wire Length | 7.9 inches (20 cm) |
| Wire Type | 7-Core Pure Copper, Tin-Coated Ends |
| Viewing Angle | 120° |
| Average Life | 20,000+ Hours |
| Indoor/Outdoor Usage | Indoor |
Figure 4: Technical drawing showing the dimensions of the 3mm pre-wired LED diode (Unit: MM).
Figure 5: Detailed specification table for 3mm round diffused LEDs, including electrical and optical characteristics.
8. Warranty and Support
For warranty information and customer support, please refer to the official EDGELEC website or contact their customer service directly. Keep your purchase receipt for any warranty claims.