Sense resistor power dissipation calculator


Too much power dissipation? You need to use a current sense amplifier ! See our Sense resistor / current shunt + current sense amplifier calculator ! **Want to calculate the correct sense resistor value for your desired sense voltage?**See Sense resistor / current shunt calculator

This calculator allows you to find out how much power your sense resistor will dissipate and how much voltage it will drop at a given current.


[calculator-input name=“i” label=“sense current” unit=“A”][/calculator-input] [calculator-input name=“r” label=“sense resistor” unit=“Ω”][/calculator-input][calculator-expression name=“u” formula=“i*r” unit=“Ω”][calculator-expression name=“p” formula=“i*i*r” unit=“W”]

[calculator-output name=“sense resistor value” unit=“Ω”] A sense resistor with a resistance of <%= format(r, “Ω”) %> drops <%= format(u, “V”) %> at a current of <%= format(i, “A”) %> and dissipates <%= format(p, “W”) %>. [/calculator-output]


[latex display=“true”]R_{text{sense}} = frac{U_{text{drop}}}{I_{text{sense}}}[/latex]

[latex display=“true”]P_{text{sense}} = I_{text{sense}}² cdot R_{text{sense}}[/latex]