kA\text{kA}

kiloampere

Electric currentexact by definition

The kiloampere is one thousand amperes. It appears in electrolysis and smelting cells, welding equipment, short-circuit fault ratings and lightning stroke currents, which typically peak in the tens of kiloamperes. The factor of 1000 is exact, being an SI prefix.

Watch out: Breaker interrupting ratings in kA describe a prospective fault current the device can safely break, not a current it carries continuously. Confusing the two badly undersizes protection.

1 kA\text{kA} 1,000 A\text{A}

One kiloampere in every electric current unit

1.00000e+18femtoampere (fA)
1.00000e+15picoampere (pA)
1,000,000,000,000nanoampere (nA)
1,000,000,000microampere (μA)
1,000,000milliampere (mA)
1,000ampere (A)
1kiloampere (kA)this unit
0.001megaampere (MA)