Name: 3mm Pre-wired Diffused LED — 20cm (5V / 12V)
Brand: NZN Electronics
SKU: LED-3MM-DIF-RED-5V
Price: 0.99 NZD
Availability: InStock

3mm Pre-wired Diffused LED — 20cm (5V / 12V)

Red / 5V

$0.99 NZD

3mm Pre-wired Diffused LED — 20cm (5V / 12V)

$0.99 NZD

Rated 4.9/5 by 20 NZN customers Verified

Shipping from $5.99 urban / $9.99 rural.

Color Red Green Yellow Orange White Blue

Voltage 5V 12V

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Unit price applies automatically in your cart.

Availability:

Easy 30-day returns · 12-month warranty

Free Urban delivery on orders over $66.00

Urban $66 Rural $88

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.

Why buy from NZN

International prices. None of the international wait.

We're a small Kiwi-owned shop, and we stock the same boards and parts you'd usually order from overseas, for about the same price. The only real difference is they ship from Te Awamutu, so you get them in a few days instead of waiting weeks.

Run by Kiwis, here in Te Awamutu

We're NZ owned and operated, and every order is picked, packed and sent from our place in Te Awamutu, Waikato.

Get it in days, not weeks

Order before 8am and it ships the same day, otherwise within 24 hours guaranteed. No waiting three to six weeks for a parcel to crawl over from overseas.

Low prices are the goal

As a maker myself, I want New Zealand to have a genuine low-price local option for electronics, not overpriced shelves or a long wait on an international parcel.