Hello and Welcome! If you have a technical question please check out our Forums. If you have an order or shipping question please refer to our Customer Support page. Please see all COVID-19 updates here and thank you for your continued support.


SparkFun will be closed on Tuesday, November 3rd because we are out voting! Orders placed after 2 pm MT Monday, November 2nd will ship on Wednesday, November 4th.

LED - Yellow with Resistor 5mm (25 pack)

You don't have to worry about adding a resistor to an LED if you get an LED with a built in resistor! This pack of 25 yellow 5mm LEDs will help alleviate any frustrations you've had with accidentally burning them out by having a resistor in the diode itself. Each LED has an operating voltage range of 2.0V to 5V to help make your next project shine!

Each pack of these LEDs are conveniently bagged in reusable ESD safe packaging to make sure nothing accidentally gets damaged before you are able to use them.

  • 25x Yellow LED w/ Resistor - 5mm
  • Operating Voltage Range: 2.0V-5.0V
  • Standard Size - T1 ¾ 5mm
  • Brightness: 2000-2500 MCD
  • Color: 585-595 NM

LED - Yellow with Resistor 5mm (25 pack) Product Help and Resources

Light-Emitting Diodes (LEDs)

August 12, 2013

Learn the basics about LEDs as well as some more advanced topics to help you calculate requirements for projects containing many LEDs.

Determining LEDs with Built-In Resistor

If you look closely at the image below, there is a small, black square IC on the post to limit the current on these types of LEDs.

LED with Built in Resistor

For more information, check out our LED tutorial.

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.
See all skill levels


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.

  • I am a bit confused.. the photo shows a 9V battery directly connected to the LED but your product description states "Each LED has an operating voltage range of 2.0V to 5V..."

    • The datasheet says something about 5V for the forward voltage. Testing it out @ 5V, it pulls about 18mA. It has been working fine at 9V and pulls about 30mA. This is probably at the higher end of the input voltage. (PS: Any higher, I'd be worried. At about 16V, the LED blew out under our stress tests).

Customer Reviews

4 out of 5

Based on 1 ratings:

Currently viewing all customer reviews.

Very useful

When building on a solderless breadboard or soldering on protoboard, component placement can be difficult enough with limited space and limited tie points, working in the resistors for your blinken lights makes it even worse. Being able to connect these straight from signal to ground helps immensely. Will still use leds with matched resistors for final boards, but for prototyping, these are awesome!