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Zinc Oxide varistor, zinc oxide block specifications:
| Type | dimension(mm) | Nominal standard discharge current(KA) | Rated voltage(kV) | MCOV (kV) | 8/20 μs Lightning impulse residual voltage(KV) | 2000/ μs square wave impulse current withstand (A) | 4/10 μs high current impulse (kA) | Line class | |
| diameter | height | ||||||||
| D35 | F35±0.2 | 24±0.5 | 5 | 3-3.4 | 2.55 | 9.1 | 100 | 65 | - |
| D38 | F38±0.2 | 24±0.5 | 10 | 3-3.4 | 2.55 | 9.3 | 150 | 100 | - |
| D42 | F42±0.2 | 24±0.5 | 10 | 3-3.4 | 2.55 | 9.2 | 250 | 100 | |
| D52 | F53±0.2 | 24±0.5 | 10 | 3-3.4 | 2.55 | 9.9 | 400 | 100 | |
Zinc Oxide Varistor, zinc oxide block