| Part Number | DC Breakdown Voltage(1) | Impulse Breakdown Voltage | DC Holdover Voltage(3) | Impulse Life | Impulse Discharge Current | AC Discharge Current | |||
| (10/1000μs 500A) | (8/20μs) | (50Hz) | |||||||
| (Model B) | 100V/s | 100V/μs | 1kV/μs | 1 Time | 10 Times(4) | 9 Cycles | 1 Second | ||
| 1 Time | |||||||||
| U-1B | 75V | ≤ 500V | ≤ 700V | ≤ 52V | 300 Times | 10 kA | 5 kA | 65 A | 10A, 5 Times |
| U-2B | 90V | ≤ 500V | ≤ 700V | ≤ 52V | 300 Times | 10 kA | 5 kA | 65 A | 10A, 5 Times |
| U-3B | 145V | ≤ 500V | ≤ 700V | ≤ 80V | 300 Times | 10 kA | 5 kA | 65 A | 10A, 5 Times |
| U-4B | 230V | ≤ 600V | 300 Times | 10 kA | 5 kA | 65 A | 10A, 5 Times | ||
| U-5B | 250V | ≤ 600V | ≤ 800V | ≤ 135V | 500 Times | 10 kA | 5 kA | 65 A | 10A, 10 Times |
| U-6B | 300V | ≤ 700V | 500 Times | 10 kA | 5 kA | 65 A | 10A, 10 Times | ||
| U-7B | 350V | ≤ 700V | 500 Times | 10 kA | 5 kA | 65 A | 10A, 10 Times | ||
| U-8B | 400V | ≤ 700V | 500 Times | 10 kA | 5 kA | 65 A | 10A, 10 Times | ||
| U-9B | 470V | ≤ 700V | ≤ 850V | ≤ 150V | 500 Times | 10 kA | 5 kA | 65 A | 10A, 10 Times |
| U-10B | 600V | ≤ 800V | ≤ 1000V | ≤ 150V | 500 Times | 10 kA | 5 kA | 65 A | 10A, 10 Times |
| U-11B | 800V | ≤ 1000V | ≤ 1200V | ≤ 150V | 500 Times | 10 kA | 5 kA | 65 A | 10A, 10 Times |