The HIITIO HCM5 Series Molded Case Circuit Breakers (MCCB) are designed for AC 50/60 Hz circuits up to 690 V and 800 A. Available in thermomagnetic (HCM5) and electronic (HCM5E) versions with L/M/H breaking capacity grades. Compact size, high breaking capacity, short arc duration and excellent vibration resistance. Suitable for infrequent switching and motor starting. Compliant with IEC 60947-1/-2 and GB/T 14048 standards.
Specifications Table (Key Parameters)
| Parameter | HCM5 / HCM5E Series |
|---|---|
| Frame sizes | 125 / 250 / 400 / 630 / 800 |
| Rated current In | 16 A – 800 A |
| Rated insulation voltage Ui | 1000 V |
| Rated impulse withstand voltage Uimp | 8 kV |
| Rated operational voltage Ue | AC 400/415 V / AC 690 V |
| Number of poles | 3P / 4P |
| Utilization category | A / B (depending on version) |
| Breaking capacity grades | L / M / H |
| Ultimate breaking capacity Icu (400/415 V) | Up to 100 kA (depending on frame & grade) |
| Service breaking capacity Ics | Up to 75 kA |
| Electrical endurance | 5000 – 600 times (frame dependent) |
| Mechanical endurance | 10000 – 4000 times (frame dependent) |
| Arc distance | ≤50 mm (smaller frames) / ≤100 mm (larger frames) |
| Ambient temperature | –35 °C to +70 °C |
| Storage temperature | –40 °C to +75 °C |
| Altitude | ≤2000 m (derating above) |
| Pollution degree | 3 |
| Installation category | III (main circuit) / II (auxiliary) |
| Standards | IEC 60947-1/-2, GB/T 14048.1/.2 |
HIITIO® was established in 2018 as a result of Hecheng Electric introducing a mature R&D team. HIITIO specializes in producing high-voltage DC electrical devices for EV, solar energy systems, and energy storage applications.
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