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Description: Holy Wattage, Batman! This Power Resistor Kit comes with 5 each of 5 different 10 Watt resistor values including 1 Ohm, 2 Ohm, 4 Ohm, 8 Ohm, and 16 Ohm. These resistors are capable of dissipating large amounts of power without damaging themselves. This kit is perfect for testing projects that require large amounts of power while only requiring low resistance.

This kit comes in a box of 25.


  • 5x 1Ω 10 Watt Resistor
  • 5x 2Ω 10 Watt Resistor
  • 5x 4Ω 10 Watt Resistor
  • 5x 8Ω 10 Watt Resistor
  • 5x 16Ω 10 Watt Resistor


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Customer Comments

  • I’d love to see a semi-decimal set of these too! 0.5, 1, 5, 10, 50, 100 Ohms

  • I used this as a heating system for my club’s weather balloon. Failed mid-flight and my sensors failed about an hour in. 0/10 would not recommend for aerial vehicles.

  • what is their tolerance rating?

    • power resistor code demystified: 10W1RJ
      10W = 10 Watts dissipation (maximum, under typical mounting conditions)
      1R = 1 Ohm. This kit includes other values, they’d be 2R, 4R, 8R and 16R.
      J = 5% tolerance. (F = 1%, K = 10%)

  • Just what I need for my thermal heating pad… normal resistors burn up in a matter of seconds.

    • Just a word to the wise, if you are using resistors as heaters, I wouldn’t recommend running them at 10 watts if that is their max power rating. They probably won’t last long if you do that. 75% should be your max under normal conditions.

      These are better for things like “dummy loads”, current sensing/limiting, and other medium to high current applications. Though they may work well enough as heaters, they may not be designed to deliver the majority of their heat to whatever they are attached to.

      The wattage rating is more of an upper limit as to how much current/voltage you can run through it without breaking it, not necessarily a measure of their “heat output” as it would be for heating device.

Customer Reviews

4.5 out of 5

Based on 2 ratings:

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As advertised, but big

I’m using them with some LEDs and an lm317t to create a constant current source. I’m using the 2Ohm ones. They are working great, and they are never even warm. Beware though, each one is about two inches long.

Just what I was looking for

This pack of resistors was just what I wanted to add to my parts box. I needed to discharge failed LiPo batteries in a short time, for disposal. So far I only used one of the resistors. The kit is a fine assortment.