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| Parameter | 3P | 4P |
| Frame size rated current Inm (A) | 400/630 | |
| Rated current In (A) | 250, 300, 350, 400, 500, 630A | |
| Rated operating voltage Ue (V) DC | 1500 | 1500 |
| Rated insulation voltage Ui (V) DC | 1500 | 1500 |
| Rated impulse withstand voltage Uimp (kV) | 8 | |
| Rated ultimate short-circuit breaking capacity Icu (kA) | 20 | |
| Rated short-time withstand current Ics (kA) | 15 | |
| Mechanical life (operations) | 4,000 | |
| Electrical life (operations) | 1,000 | |
| Degree of protection | IP20 | |
| Operating temperature | -45°C ~ +70°C | |
| Mounting type | Fixed | |
| Dimensions (L × W × H, mm) | 257 × 150 × 103 | 257 × 198 × 103 |
| Available accessories | Undervoltage trip, auxiliary contact, alarm contact, shunt trip, motorized operating mechanism, rotary handle | |
UKM5DC 1500V 400A 4 Pole DC MCCB PV Solar Molded Case Circuit Breaker
The UKM5DC-400 4-Pole DC Molded Case Circuit Breaker is built for high-performance DC system protection, offering enhanced flexibility for multi-line DC circuits. With voltage ratings of 1000V and 1500V DC and current ratings from 250A to 630A, it is ideal for large-scale photovoltaic plants, energy storage stations, and industrial DC grids. Its maximum breaking capacity of 20kA and full range of protective functions ensure safe and reliable operation in demanding environments.
Free Quote NowKey Features
- Designed for 1000V / 1500V DC applications
- Breaking capacity — up to 20kA
- Multiple rated currents: 250, 300, 350, 400, 500, 630A
- Robust mechanical design with 4,000 mechanical operations
- Electrical life: 1,000 operations
- Wide temperature tolerance: -45°C to +70°C
- IP20 safety rating to prevent accidental contact
- Compatible with multiple accessories for system integration
- Fixed type installation, easy to mount
Applications
- Large photovoltaic array protection
- DC bus and distribution network protection
- Energy storage system main breaker
- Industrial DC system protection
- Electric vehicle charging infrastructure
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