3mm Pre-wired Diffused LED — 20cm (5V / 12V)
Red / 5V
$0.99 NZD
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$0.99 NZD
3mm Pre-wired Diffused LED — 20cm (5V / 12V)
Stock amount:
Tax included. Shipping is calculated at checkout.
Urban $40
Rural $60
Ready-to-use 3mm diffused LEDs with a built-in current-limiting resistor — simply connect to your 5V or 12V DC supply and they light up instantly. No resistor calculations or extra components required.
- Built-in resistor pre-installed
- Available in 5V or 12V variants
- 20cm pre-wired leads
- Wide-angle diffused lens
- Available in six colours
Ready To Connect
The resistor is already soldered inside the heat shrink tubing near the LED, making these ideal for Arduino, ESP32, Raspberry Pi, automotive, and control panel projects without additional wiring complexity.
Please note: Select the correct voltage variant for your application. 5V and 12V versions use different built-in resistors.
Specifications
LED Size3mm
Lens TypeDiffused
Operating Voltage5V or 12V DC
Forward Current20mA max
Viewing Angle160–180°
Wire Length20cm
Wire ColoursRed (+) / Black (-)
LED ColoursRed, White, Blue, Green, Yellow, Orange
Life Rating100,000 hours
Operating Temperature-40°C to +85°C
Package TypeThrough-hole pre-wired LED
Please note: Each LED includes a resistor matched specifically to its voltage variant.
How To Connect
Wire Polarity
Red wire → Positive supply
Black wire → Ground / negative
Voltage Variants
5V version: Suitable for Arduino, Raspberry Pi, ESP32, USB power supplies, and microcontroller GPIO outputs.
12V version: Suitable for automotive, CCTV systems, LED drivers, alarm systems, and regulated 12V DC supplies.
Please note: Connecting the wrong voltage may damage the LED or reduce brightness.
Common Uses
Arduino and ESP32 status indicators
Breadboard and electronics prototyping
Automotive dashboard indicator lights
Control panels and switchboards
RC, caravan, and marine projects
Model, diorama, and miniature lighting
Please note: These LEDs are polarity-sensitive and will not illuminate if wired backwards.
Common Questions
Do I need an external resistor?
No — the resistor is already built into the wiring under the heat shrink tubing.
Can I use the 5V version at 12V?
No. Each version is designed specifically for its rated voltage. Using the wrong voltage may permanently damage the LED.
Will the 5V version work with Arduino?
Yes. It can connect directly to a 5V supply or Arduino GPIO output pin.
Can I use the 12V version in a vehicle?
Yes — these are suitable for automotive indicator and panel lighting applications on 12V systems.
Are these diffused or clear LEDs?
These use a diffused lens for a softer, wider-angle glow rather than a narrow focused beam.
Please note: Each LED is sold individually unless otherwise stated.