Zener Diode - 5.1V 1W

Zener diodes are useful for creating a reference voltage or as a voltage stabilizer for low-current applications.These diodes are rated for 5.1 volts with a maximum of 1W. Price is for a single diode.

Zener Diode - 5.1V 1W Product Help and Resources

Core Skill: Soldering

This skill defines how difficult the soldering is on a particular product. It might be a couple simple solder joints, or require special reflow tools.

1 Soldering

Skill Level: Noob - Some basic soldering is required, but it is limited to a just a few pins, basic through-hole soldering, and couple (if any) polarized components. A basic soldering iron is all you should need.
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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.

1 Electrical Prototyping

Skill Level: Noob - You don't need to reference a datasheet, but you will need to know basic power requirements.
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Customer Comments

  • I need some 3.3v Zener diodes as well.

  • I would love to see a 3.6V zener diode. Useful for building software USB on ATtinys. See the V-USB implementation here: http://vusb.wikidot.com/hardware. This allows folks to get everything they need to build a USB device using AVR entirely on Sparkfun.

  • Any chance to see them in SMD array ? You already sell USB connectors….

  • Question:

    Can a device like this be used to protect the ADC on the Arduino from over-voltage? I am working on a circuit and I don’t have an oscilloscope, so I will be experimenting with different gains on an op amp until I get a good voltage range for input into the ADC.

    Can (or should) I use a Zener like this to prevent sending too much voltage to the ADC input without altering lower voltage signals (i.e. will the signal be unmodified if the max voltages stay under the zenar’s trigger voltage)?

  • Wait, so these are like for bringing a voltage up to 5v for something?

    • These differ from regular diodes by what happens when you exceed it’s voltage rating. A normal diode burns up, and is usually damaged by heat. However, a zener instead allows current to flow backward through it. This can be used to essentially drain off excess voltage to ground, so that it stabilizes at 5.1V (which is this diode’s rating).

      • …i.e. if you send 6V across this diode, it will shunt .9 to ground and give you 5.1V. This one’s probably meant for use as a VERY VERY VERY VERY cheap regulator for 5V micros.

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