SparkFun Discrete Semiconductor Kit

If you do anything with electronics, you’re probably already using transistors, but you’re probably using them in large, prepackaged clusters of just one type. The SparkFun Discrete Semiconductor Kit addresses your needs of only needing one or a couple transistors without you needing go and order a single transistor. Inside each kit you will find multiple types of semiconductors including PNP and NPN bipolar transistors, N-channel and P-channel MOSFETs, diodes, adjustable voltage references, and adjustable voltage regulators.

Because discrete semiconductors are a basic building block of electronic circuits, this assortment of discrete semiconductor makes for a perfect addition to a workbench regardless if you are a beginner or an advanced electronics nerd!

  • 25x NPN Transistor - 2N3904
  • 25x PNP Transistor - 2N3906
  • 10x N-channel MOSFET - 5LN01SP
  • 10x P-Channel MOSFET - 5LP01SP
  • 20x Silicon Diode - 1N4148
  • 20x Power Diode - 1N4004
  • 5x Voltage Reference - TL431A
  • 5x Voltage Regulator - LM317LZ

SparkFun Discrete Semiconductor Kit Product Help and Resources

Proto Pedal Example: Analog Equalizer Project

September 22, 2016

Building a gyrator-based analog equalizer using the Proto Pedal.

Discrete Semiconductor Kit Identification Guide

November 19, 2015

Get to know the contents of the SparkFun Discrete Semiconductor Kit.


July 1, 2014

A crash course in bi-polar junction transistors. Learn how transistors work and in which circuits we use them.


May 9, 2013

A diode primer! Diode properties, types of diodes, and diode applications.

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.

  • Ah, I've been looking around for some small-signal P-channel MOSFETs in TO-92 or similar packages for a while, along with their complementary N-channel devices. Have a couple of design ideas requiring these, and although I have some stock of P- and N-channel devices in SOT23 packages, I still have been on the lookout for some through-hole ones. And here they are.

    The other components are bonus ones to me right now; though the voltage references are also something I would have been looking for sooner rather than later. As for LM317, the 2N3904 and 2N3906 and the diodes, these are generally useful and convenient to have around and available right here.

    Overall, this is an excellent collection of small devices.

  • Who's the doofus escapee from Pirates of the Caribbean?"

  • Integrated circuits aren't really "just one type" of transistor (some early ones like PMOS were), but modern ones normally have at least two kinds of transistors, and often many more. Also, "Identification" is misspelled.

  • Is there any MOQ?

    • No, our products are intended for end users and so are usually sold as singles, but if you need more we can always comply.

Customer Reviews

3.5 out of 5

Based on 2 ratings:

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2 of 2 found this helpful:

I bought two of them

Nice selection of commonly used semiconductors. Haven't had a problem with them and great to know I've always got a handy selection on hand.

5 of 5 found this helpful:

Great selection, some labeling would be nice

It's a great selection of semiconductors. Exactly what I need for some projects I'm working on.

My big objection is the packaging. Each item comes in a small plastic bag with no label. So instead of opening the box and working on my project, I had to spend a half hour with a magnifier and their identification guide to figure out which item was which and put a small label in the bag with the item. This could easily have been done by whoever packaged them in the first place. Not impressed.