This means it is built for installations where a delayed trip is needed to achieve selectivity with downstream RCDs, preventing nuisance tripping on the main feeder while still clearing earth faults.
At higher panel temperatures, the unit derates: 58.6 A at 40 °C, 56.7 A at 50 °C, 54.81 A at 55 °C, 53.55 A at 60 °C, 52.29 A at 65 °C, and 50.4 A at 70 °C. The 1000 mA tripping threshold is high — this is for main feeders or sub-distribution where a lower mA rating would cause coordination issues with downstream 30 mA RCDs. The selective design (short-time delayed) ensures the downstream device trips first on a low-impedance fault. Mounting position is any orientation. Insulation voltage is rated 460 V, overvoltage category III, suitable for fixed installation in distribution boards. The unit is silicon-free, which matters for potting or conformal-coating processes in certain industrial environments.
Mounts on DIN rail (REG) — standard for distribution boards. Depth is 70 mm, width 107 mm, height 90 mm. The unit is designed for the 5SY series; verify mechanical compatibility with your specific MCB model if using a different brand.