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 akaCommented Jul 14, 2018 at 9:32
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\$\begingroup\$ Sorry!! i calculated it for 10A rating.. Andy aka \$\endgroup\$– user191834Commented Jul 14, 2018 at 9:39
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\$\begingroup\$ I've got some nichrome resistance wire from a toaster in my junk pile... \$\endgroup\$– Jasen Слава УкраїніCommented Jul 14, 2018 at 11:48
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2 Answers
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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.
answered Jul 14, 2018 at 9:43
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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\$ Commented Jul 14, 2018 at 10:22
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\$\begingroup\$ Thankyou :) But i am waiting for the ans of my last ques :) \$\endgroup\$ Commented Jul 14, 2018 at 10:30
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\$\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 akaCommented Jul 14, 2018 at 10:38