JLSMZ Photovoltaic DC MCCB
JLSMZ Photovoltaic DC MCCB
The JUNELUC JLSMZ DC Molded Case Circuit Breaker is an advanced protection solution engineered for high-voltage direct current (DC) applications such as solar energy systems and modern industrial installations. It provides reliable protection against overcurrent, short circuit, and undervoltage conditions, with operational capabilities up to DC 1000V and rated currents up to 250A.
Built with an efficient arc-extinguishing mechanism and high breaking capacity, the JLSMZ DC ensures fast fault isolation, even under demanding conditions. Its compact, installation-friendly design is combined with high-quality, heat- and corrosion-resistant components, making it ideal for long-term use in harsh environments.
The breaker supports multiple voltage configurations: DC250V, DC500V, DC750V, and DC1000V.
Key Applications:
- Solar photovoltaic (PV) systems
- Energy storage and backup systems
- Industrial DC-powered applications
Applicable Standards: IEC 60947-1 and IEC 60947-2.
| Standard | IEC60947-1 and IEC60947-2 GB 14048.1、GB 14048.2 | ||||||||||||
| Type | JLS1MZ-125 | JLS2MZ-250 | JLS4MZ-400 | JLS6MZ-630 | |||||||||
| Frame level ln (A) | 125A | 250A | 400A | 630A | |||||||||
| Rated current (In) (A) | 50/63 80/100/125 | /50/63/80 100/125/140/160 /180/200/225/250 | 225/250/300/350/400 | 400/500/630 | |||||||||
| Number of poles | 2P | 3P | 4P | 2P | 3P | 4P | 2P | 3P | 4P | 2P | 3P | 4P | |
| Rated insulation voltage Ui (V DC) | 1000V | ||||||||||||
| Rated impulse withstanding voltage Uimp (V) | 8000V | ||||||||||||
| Rated working voltage Ue (V DC) | DC250 | DC500 | DC750 | DC250 | DC500 | DC750 | DC1000 | ||||||
| DC500 | DC750 | DC1000 | DC500 | DC750 | DC1000 | ||||||||
| Using category | A | ||||||||||||
| Arcing distance (mm) | ≤50 | ||||||||||||
| Rated short time making capacity Icm (kA) | 100% lcu | ||||||||||||
| Rated limiting short- circuit breaking capacity Icu (kA) | DC 250V | 35 | 35 | ||||||||||
| DC 500V | 20 | 35 | 20 | 35 | |||||||||
| DC 750V | 20 | 35 | 20 | 35 | |||||||||
| DC 1000V | 20 | 20 | 35 | 35 | 35 | 35 | 35 | 35 | |||||
| Rated service short-circuit interrupting capacity (Ics) | 75%Icu | ||||||||||||
| Electric life (times) | 5000 | ||||||||||||
| Mechanical life (times) | Without maintenance | 10000 | |||||||||||
| With maintenance | 20000 | ||||||||||||
| Operating Temperature | -25℃－ +50℃ | ||||||||||||
| Protection Grade | IP20 | ||||||||||||
| Flashover Distance | ≥50 | ||||||||||||
| Instantaneous Action Value | 10ln | ||||||||||||
| Installation Method | Fixed type, Plug-in | ||||||||||||
