| Parameter / Engineering Feature | Technical Specification Details |
| Official Brand / Manufacturer | AISIKAI Electric |
| Model Designation Code | SKT1-250 / SKT1-250A (Extended Frame Shell) |
| ATS Equipment Classification | PC Class (Unified mechanical isolation architecture) |
| Utilization Load Category | AC-33A (Optimized for frequent under-load inductive switching) |
| Agreed Thermal Current ($I_{th}$) | 250 A |
| Rated Operational Current ($I_e$) | 250 A (Internal busbar structure rated for peak thermal saturation) |
| Pole Configurations ($P$) | 3-Pole (3P) or 4-Pole (4P with fully isolated Neutral) |
| Rated Insulation Voltage ($U_i$) | 1000 V |
| Rated Impulse Withstand ($U_{imp}$) | 12 kV |
| Rated Operational Voltage ($U_e$) | AC 400 V / AC 440 V (50 Hz / 60 Hz) |
| Rated Short-Time Withstand ($I_w$) | 26 kA (1-Second safety hold constraint) |
| Rated Short-Circuit Making ($I_{cm}$) | 54.6 kA (Peak transient fault capacity) |
| Switching Transition Delay Time | $\approx 0.6 \text{ to } 0.8 \text{ Seconds}$ ($I \to 0 \to II$) |
| Control Motor Drive Voltage | AC 220 V Nominal |
| Mechanical / Electrical Lifespan | $\ge 8,000$ complete operations under loaded states |