3A228

Cold-cathode tubes, whether gas filled or not, operating similarly to a spark gap, having all of the following characteristics: 1. Containing three or more electrodes; 2. Anode peak voltage rating of 2,5 kV or more; 3. Anode peak current rating of 100 A or more; and 4. Anode delay time of 10 μs or less;

Triggered spark-gaps having both of the following characteristics: 1. An anode delay time of 15 μs or less; and 2. Rated for a peak current of 500 A or more;

Modules or assemblies with a fast switching function, other than those specified in 3A001.g. or 3A001.h., having all of the following characteristics: 1. Anode peak voltage rating greater than 2 kV; 2. Anode peak current rating of 500 A or more; and 3. Turn-on time of 1 μs or less.