Published on February 27, 2026 | Category: Solar Energy
DC Circuit Breakers for Solar Applications: Selection Guide
Are you looking for guidance on DC circuit breaker for solar? Whether you’re a solar installer, an engineer, or a project developer, choosing the right DC circuit breaker is crucial for solar PV system safety and reliability.
Understanding DC Circuit Breakers for Solar
DC circuit breakers are essential safety devices in solar PV systems. Unlike AC circuit breakers, DC breakers must handle the unique characteristics of direct current, including arc extinction challenges. The Chint NB1-63DC series is specifically designed for DC applications with voltage ratings up to 250V DC.
Key Selection Criteria
- Voltage Rating: Match or exceed your system voltage – 250V DC for residential solar
- Current Rating: Size for 1.25x the maximum continuous current (e.g., NB1-63DC available in 1A-63A)
- Breaking Capacity: Must exceed maximum prospective short-circuit current (6kA/10kA options)
- Polarity: DC breakers have specific polarity requirements
- Certifications: IEC 60898-2 for DC MCBs, CE marked
Featured Product: Chint NB1-63DC
The Chint NB1-63DC miniature circuit breaker is our recommended solution for solar DC applications:
- Voltage Rating: 250V DC (1P/2P configurations)
- Current Range: 1A, 2A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
- Breaking Capacity: 6kA (standard), 10kA (high breaking)
- Trip Curves: B, C, D curves available
- Certifications: CE, IEC 60898-2, TUV, RoHS
- Mounting: DIN rail (35mm) installation
Product Gallery
NB1-63DC Front View – 250V DC Rated 
DIN Rail Mounting – Easy Installation
Why Choose Shanghai Newtrend Electric?
- ✅ Authorized Chint Distributor: Genuine NB1-63DC with full warranty
- ✅ Solar Industry Experience: 15+ years supplying DC protection solutions
- ✅ Technical Support: DC system design assistance
- ✅ Competitive Pricing: Factory-direct Chint pricing
- ✅ Fast Delivery: Stock available, 7-15 days delivery
- ✅ OEM Services: Custom labeling and packaging available
Applications
The NB1-63DC DC circuit breaker is ideal for:
- ☀️ Solar PV Systems: String protection, combiner boxes, inverter protection
- 🔋 Battery Systems: Battery bank protection, charge controller circuits
- 🚗 EV Charging: DC charging station protection
- 🏭 Industrial DC: Control circuits, DC distribution panels
Conclusion
Selecting the right DC circuit breaker like the Chint NB1-63DC is critical for solar PV system safety. With proper voltage and current ratings, high breaking capacity, and international certifications, the NB1-63DC provides reliable protection for your DC installations.
Ready to order Chint NB1-63DC? Contact us today for competitive pricing and technical support!
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