High-Performance DC Circuit Breaker - The NQCM1Z-H series offers reliable DC circuit protection up to 800V with 25kA breaking capacity. Ideal for photovoltaic systems, battery storage, and EV charging stations with non-polarized bidirectional current flow (charging/discharging) and fast short-circuit protection (<0.1s).
Durable & Safe Design - Features silver contacts for enhanced conductivity, flame-retardant materials that resist high temperatures, and custom arc magnets for efficient arc extinguishing. Mechanical life exceeds 8000 operations while electrical durability reaches 4500 cycles.
Versatile Applications - Perfect for solar PV systems (up to 1000V), battery banks (bidirectional protection), and EV charging piles. Compact size (165x75x104mm for 250A model) allows easy integration into various DC power systems.
User-Friendly Operation - Includes multiple operation modes (top/bottom terminals), manual trip button, and clear ON/OFF handle. Optional shunt trip release available for remote control. Meets IEC6047-2 standards with +40°C Cat A rating.
Optimized Connectivity - SC-type terminals support cables up to 70mm² (2/0 AWG) with 8mm hole crimped connections. Features overload protection, short-circuit protection, and voltage-current collection in one robust package.
NQCM12-H Series DC Circuit Breaker
Key Features
Non-polarized bidirectional current flow (charging/discharging)
DC600V rated voltage (up to DC800V capability)
Ultra-fast short-circuit protection <0.1s
25kA breaking capacity (Icu=25kA)
Flame-retardant housing with arc extinguishing system
Silver contacts for enhanced durability
Compact modular design for easy installation
Technical Specifications
| Model | NQCM12-125H | NQCM12-250H |
|---|---|---|
| Rated Voltage | DC600V (36-600V range) | |
| Current Ratings | 63A, 80A, 100A, 125A | 160A, 200A, 250A |
| Breaking Capacity | 25kA | |
| Mechanical Life | >8000 operations | |
| Electrical Life | >4500 cycles | |
| Dimensions (mm) | 150×65×85 | 165×75×104 |
| Terminal Type | SC-type with 8mm hole | |
Terminal Specifications
| Current Rating | Terminal Type | Hole Size | Cable Size |
|---|---|---|---|
| 63A | SC16-8 | 8mm | 16mm² (6AWG) |
| 80A | SC25-8 | 8mm | 25mm² (4AWG) |
| 100A | SC35-8 | 8mm | 35mm² (2AWG) |
| 125A | SC35-8 | 8mm | 35mm² (2AWG) |
| 160A | SC50-8 | 8mm | 50mm² (0AWG) |
| 200A | SC70-8 | 8mm | 70mm² (2/0AWG) |
| 250A | SC70-8 | 8mm | 70mm² (2/0AWG) |
Applications
Photovoltaic Systems: Up to DC1000V voltage collection and 250A current protection
Battery Storage: Bidirectional protection for charging/discharging with emergency manual cutoff
EV Charging Stations: High-current charging load protection in compact size
DC Power Distribution: Overload and short-circuit protection for various DC systems
Safety Features
Custom arc magnets for improved arc extinguishing
High-temperature resistant flame-retardant materials
Double isolation protection
Push-to-trip emergency button
Compliant with IEC6047-2 standards