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I am trying to make a load using resistor that can bear 12V 4A rated values. I have calculated a resistance but that has a low resistance and high power rated resistor i.e. 3 ohms 48 Watt resistor. It is impossible to find this so please help me regarding the load resistance. Thankyou

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  • \$\begingroup\$ 12 volts at 5 amps is 2.4 ohms. \$\endgroup\$ – Andy aka Jul 14 '18 at 9:32
  • \$\begingroup\$ Sorry!! i calculated it for 10A rating.. Andy aka \$\endgroup\$ – user191834 Jul 14 '18 at 9:39
  • \$\begingroup\$ I've got some nichrome resistance wire from a toaster in my junk pile... \$\endgroup\$ – Jasen Jul 14 '18 at 11:48
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A resistor network will distribute the power dissipation across multiple resistors. Using three 10ohm 25W resistors in parallel will result in a 3.3ohm 75W resistance.

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It is impossible to find this

There are plenty to choose from such as this from Farnell: -

enter image description here

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  • \$\begingroup\$ tell me if you have to design a load for 12V and 10 amp rating. So what values would you prefer? \$\endgroup\$ – user191834 Jul 14 '18 at 10:22
  • \$\begingroup\$ Thankyou :) But i am waiting for the ans of my last ques :) \$\endgroup\$ – user191834 Jul 14 '18 at 10:30
  • \$\begingroup\$ I think you should look on Farnell (as per the link in my answer) and select the appropriate value resistor and do a farnell search. \$\endgroup\$ – Andy aka Jul 14 '18 at 10:38

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