AMC3301: RSHUNT

Liu Yang

Part Number: AMC3301

Hi Team,

I am using 300VAC and 5A current, May I know the resistor value and wattage value of resistor (RSHUNT) for current measurement?

Best Regards,

Tom Liu

over 1 year ago

+1 kai klaas69 over 1 year ago

Guru 140200 points

Hi Tom,

this is very simple: The linear input voltage range of AMC3301 is +/-250mV. -> Rshunt = 250mV / 5A = 50mR. The shunt has to dissipate a heat of P = 250mV x 5A = 1.25W. So I would take a 4-terminal shunt of at least 2W (better more). You could take such a type, e.g.:

https://eu.mouser.com/ProductDetail/Ohmite/FC4L64R050FER?qs=%252BQRAF80zCGETpYYZpU4EUg%3D%3D

Kai

0 Tom Hendrick over 1 year ago in reply to kai klaas69

TI__Guru**** 168605 points

Hi Kai,

Thank you for giving Tom a little refresher!

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AMC3301: RSHUNT