LED - Basic Blue 5mm

LEDs - those blinky things. A must have for power indication, pin status, opto-electronic sensors, and fun blinky displays.

This is a very basic 5mm LED with a blue lens. It has a typical forward voltage of 3.4V and a rated forward current of 30mA.

  • 3.4VDC forward drop
  • Max current: 30mA

LED - Basic Blue 5mm Product Help and Resources

SparkFun Paper Circuit Kits

July 5, 2018

Learn how to build a simple paper circuit using copper tape, a 5mm LED, and a 3V coin cell battery.

Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

2 Electrical Prototyping

Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
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Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • Member #797661 / about 6 years ago / 1

    How well do these work as a replacement for the 3V6 zeners in a v-usb project operating at 5 volts? Current is 25mA assuming 3.4V Vf, btw, due to 68 ohm resistors. (3V6 zeners over 3V3 due to the I/V curve placing 3.3V at 100s of mA on a 3V3 zener, iirc)

  • ferranpce / about 10 years ago * / 1

    What is the wavelength for this one?

    Also, I measured 2.8V forward drop.

  • Sparky91381 / about 11 years ago / 1

    hard to find blue diffused leds so when i saw them i jumped for joy - these things are bright and impressive - just what i was looking for

Customer Reviews

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1 of 1 found this helpful:

These look nice and are bright

I like these much better than the blue LEDs that came in my university's (randomly assembled) kits. These ones are quite bright and are a nice shade of blue.

Rare Earth LED

Always had 5 mm Red/Green/Yellow ones since childhood BUT these are special !