Custom DC Circuit Breaker Supplier
Professional OEM/ODM manufacturer with 20+ years experience. Minimum order quantity from 100 pieces, 15-30 days delivery, full customization support for specifications, materials, and packaging. Your trusted partner for high-quality DC circuit protection solutions.
Your Trusted DC Circuit Breaker Supplier
With ISO 9001:2015 and ISO 14001:2015 certifications, XiangOu Solar has been serving global markets for over 20 years. Our dedicated international business team provides comprehensive after-sales support, backed by advanced testing laboratories and automated production lines. Serving customers across Europe, North America, and Asia-Pacific regions with reliable quality assurance and technical expertise.
20+
Years Experience
Professional manufacturing since 2005
ISO
Certified Quality
ISO 9001:2015 & ISO 14001:2015
50+
Countries Served
Global market presence
24/7
Technical Support
Dedicated engineering team
Explore Our DC Circuit Breaker Series
Professional grade DC circuit breakers designed for solar PV applications, energy storage systems, and industrial DC power distribution
DC MCB Series
Ideal for residential and commercial solar installations. Compact design with excellent arc extinguishing capability for reliable DC circuit protection.
DC MCCB Series
Heavy-duty molded case circuit breakers for industrial applications and large-scale solar farms. Advanced thermal-magnetic protection with adjustable settings.
DC Fuse Series
High-performance DC fuses with superior current limiting characteristics. Designed for photovoltaic string protection and DC distribution systems.
DC Surge Protector
Advanced surge protection devices for DC systems. Provides reliable protection against lightning and switching overvoltages in solar installations.
Why Partner with XiangOu Solar for Your DC Circuit Breaker Needs?
Experience the advantages of working with a trusted manufacturer committed to excellence, innovation, and customer success
Reliable Supply Chain & Fast Delivery
Streamlined production process with 15-30 days standard delivery. Emergency rush orders supported with dedicated production lines and priority scheduling.
Competitive Pricing & Full Customization
Direct factory pricing with flexible MOQ from 100 pieces. Complete customization support for specifications, materials, colors, and packaging requirements.
Advanced Quality Management
ISO certified quality system with in-house testing laboratory. Three-stage quality control: incoming materials, production process, and final inspection.
Expert Technical Support
Direct communication with experienced engineers. Free design optimization, technical consultation, and application guidance throughout your project.
Global Compliance & Certifications
Comprehensive certification support including CE, RoHS, UL, TUV, and IEC standards. Complete documentation and compliance assistance for global markets.
Comprehensive After-Sales Service
Extended warranty coverage with responsive technical support. Maintenance guidance, troubleshooting assistance, and replacement parts availability.
Frequently Asked Questions
Get answers to common questions about our DC circuit breaker manufacturing and services
What is your delivery time and do you support rush orders?
Standard delivery time is 15-30 days depending on order quantity and customization requirements. For urgent projects, we offer expedited production with 7-15 days delivery through our dedicated express production line. Rush order surcharges apply, and we require 50% advance payment for priority scheduling.
What is your minimum order quantity and pricing structure?
Our minimum order quantity starts from 100 pieces for standard models and 500 pieces for custom designs. We offer tiered pricing: 100-499 pieces (standard price), 500-999 pieces (5% discount), 1000-4999 pieces (10% discount), and 5000+ pieces (15% discount). Volume discounts and long-term partnership rates are available for qualified customers.
Do you support custom specifications, materials, colors, and packaging?
Yes, we provide comprehensive customization services including electrical specifications, housing materials (thermoplastic, thermoset), contact materials (silver alloy, copper), custom colors, and branded packaging. Our engineering team works closely with customers to optimize designs for performance and cost-effectiveness. Custom tooling fees may apply for unique requirements.
What are your quality inspection standards and warranty policy?
We follow IEC 60947-2 and UL 489 standards with comprehensive testing including dielectric strength, insulation resistance, temperature rise, and breaking capacity tests. Every product undergoes 100% electrical testing before shipment. We provide 2-year warranty coverage with free replacement for manufacturing defects and 24/7 technical support.
What is your sample policy and prototyping timeline?
We offer free samples for standard models (customer pays shipping) and paid samples for custom designs ($50-200 depending on complexity). Standard samples ship within 3-5 days, while custom prototypes require 7-15 days. Sample costs are fully refunded with orders over 1000 pieces. We provide detailed test reports and certification documents with all samples.
What shipping methods do you offer and do you provide customs clearance support?
We offer multiple shipping options: Express (DHL/FedEx/UPS) for 3-7 days, Air freight for 7-12 days, and Sea freight for 15-35 days. Our logistics team provides complete customs documentation, assists with duty optimization, and partners with reliable freight forwarders worldwide. We offer DDP terms for major markets including USA, Europe, and Australia.
Production & Quality Control Excellence
State-of-the-art manufacturing facilities with advanced automation and rigorous quality assurance processes
Manufacturing Capabilities
Advanced Production Lines
6 fully automated production lines with monthly capacity of 500,000+ units. Latest SMT equipment, automated testing systems, and robotic assembly for consistent quality and high efficiency.
Clean Workshop Environment
5000㎡ climate-controlled facility with Class 10,000 cleanroom standards. Implemented 5S methodology and strict safety protocols ensuring optimal working conditions and product quality.
Precision Equipment
German-imported molding machines, Japanese precision measurement tools, and Swiss contact welding equipment ensuring superior product performance and reliability.
Quality Inspection Process
Packaging Solutions
Certifications
The Ultimate Guide to DC Circuit Breakers
Comprehensive resource for engineers, project managers, and procurement professionals. This guide covers everything from basic principles to advanced applications, helping you make informed decisions for your DC protection requirements.
Guide Contents
Q1: How to quickly determine if a DC circuit breaker is suitable for my application?
Answer: First, identify your system voltage (DC), maximum current, and fault current levels. Match these with the breaker's voltage rating, current rating, and breaking capacity. Consider environmental factors (temperature, humidity, altitude) and installation requirements (DIN rail, panel mount). For solar applications, ensure the breaker is rated for DC switching and has appropriate arc extinction capabilities.
Q2: What are the 3 most critical parameters when selecting DC circuit breakers?
Answer: (1) DC Voltage Rating: Must exceed maximum system voltage by 25% safety margin. (2) Current Rating: Should be 125% of maximum continuous current. (3) Breaking Capacity: Must exceed maximum fault current at the installation point. Additional considerations include trip characteristics (B, C, D curves) and environmental ratings (IP protection).
Q3: How do different materials and processes affect performance and cost?
Answer: Contact Materials: Silver alloy (premium, low resistance, high cost) vs. copper (standard, moderate cost). Housing Materials: Thermosetting plastic (high temperature resistance, higher cost) vs. thermoplastic (standard applications, lower cost). Arc Chambers: Ceramic (industrial grade) vs. plastic (commercial grade). Material selection impacts lifespan, performance, and pricing by 15-40%.
Q4: How to develop an effective customization plan with samples or drawings?
Answer: Provide complete specifications including electrical ratings, mechanical dimensions, terminal configurations, and environmental requirements. Include application details, quantity expectations, and timeline. For existing products, send samples with modification requirements. Our engineering team will provide feasibility analysis, cost implications, and timeline within 48 hours, followed by detailed technical proposal and prototype development plan.
Q5: What quality control measures should be implemented for incoming, process, and outgoing inspection?
Answer: Incoming: Visual inspection, dimensional verification, electrical parameter testing. Process: In-line testing at each assembly stage, statistical process control, first-article inspection. Outgoing: 100% electrical testing, dielectric strength test, insulation resistance measurement, mechanical operation test. All tests documented with certificates and traceability records.
Q6: What are the common cost components in quotations and optimization suggestions?
Answer: Cost Breakdown: Materials (40-50%), Labor (20-25%), Overhead (15-20%), Tooling (5-10%), Profit (10-15%). Optimization: Increase order quantities for volume discounts, standardize specifications to reduce tooling costs, optimize packaging for shipping efficiency, consider long-term agreements for better pricing, and bundle orders to reduce setup costs.
Q7: What are the common international certification requirements and obtaining procedures?
Answer: Key Certifications: CE (Europe), UL (North America), CCC (China), PSE (Japan), KC (Korea). Process: Submit technical documentation, product samples for testing, factory inspection (if required), certification issuance. Timeline: 6-12 weeks. We provide complete support including documentation preparation, test coordination, and compliance verification.
Q8: How to optimize shipping packaging to reduce damage and claim risks?
Answer: Use impact-resistant packaging with cushioning materials, moisture barriers for sea freight, proper labeling with handling instructions. Implement drop tests, vibration tests for package validation. Include shock indicators and tilt sensors for high-value shipments. Provide detailed unpacking instructions and immediate inspection guidelines. Insurance coverage and clear damage reporting procedures minimize claim disputes.
Q9: What are common failure modes and troubleshooting procedures?
Answer: Common Issues: Nuisance tripping (check load calculations), contact welding (verify breaking capacity), mechanical failure (check operating cycles). Troubleshooting: Measure contact resistance, verify trip settings, check mounting torque, inspect for environmental contamination. We provide detailed troubleshooting guides, remote technical support, and on-site assistance for complex issues.
Q10: How to establish effective long-term cooperation mechanisms with suppliers?
Answer: Establish clear quality agreements, regular performance reviews, forecast sharing for production planning, joint product development programs, and escalation procedures for issue resolution. Implement supplier scorecards, annual business reviews, and continuous improvement initiatives. Consider strategic partnerships with volume commitments, exclusive arrangements, and co-investment in tooling or technology development.
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