Low Voltage Switchgear & Distribution Panels
DB/SDB (Distribution Board/Sub-Distribution Board) is a standardized low-voltage power distribution solution. The Main Distribution Board (DB) serves as the core distribution unit of the power system, while the Sub-Distribution Board (SDB) further distributes power to end-use equipment. This product series covers a rated current range from 63A to 1600A, suitable for various commercial, industrial, and residential buildings, meeting different environmental power distribution requirements.
Parameter Category | Technical Specifications |
Rated Characteristics | Rated Current (In): 63A, 100A, 250A, 400A, 630A, 800A, 1000A, 1250A, 1600A |
Short-circuit Performance | Rated Short-time Withstand Current (Icw): Up to 25kA/1s |
Protection Degree | IP42 (Indoor standard), IP54 (Outdoor or high protection environments) |
Enclosure Material | Premium galvanized steel (Thickness: 1.2mm-2.0mm) or 304 stainless steel (Special environments) |
Enclosure Dimensions | Various sizes: 400x300x200mm to 1000x800x300mm (HxWxD) |
Cable Entry/Exit | Bottom entry/exit (Standard), Top entry/exit, Side entry/exit (Optional) |
Compliance Standards | IEC 61439, IEC 60529 and relevant national standards |
1.High-quality Protection Design
Special anti-corrosion treatment (Phosphating + Epoxy resin powder coating) provides excellent corrosion resistance
Reasonable ventilation and heat dissipation design ensures long-term stable operation
Optional stainless steel material suitable for special environments
2.Modular Flexible Configuration
Standardized modular design supports various circuit breaker installations (MCB, MCCB, RCCB, RCBO)
Configurable with multiple functional units: Main switch unit, Lighting circuit unit, Socket circuit unit, Motor control unit
Easy expansion allows for adding circuits or upgrading capacity according to changing power demands
3.Safe and Reliable Protection
Fully isolated design with complete separation of live parts prevents accidental contact
High-quality copper busbar connections with low impedance and high conductivity reduce energy loss
Comprehensive earthing system ensures personal safety
Optional transparent polycarbonate covers for easy status checking while providing protection
4.Easy Installation and Maintenance
Front wiring design facilitates installation and maintenance
Spacious wiring space convenient for cable entry and wiring
Clear labeling system supporting multilingual markings
Modular structure allows for quick replacement of components
5.Diverse Application Options
Indoor type: Wall-mounted, Floor-standing
Outdoor type: Waterproof and dustproof, suitable for outdoor installation
Tamper-proof type: Lockable design prevents unauthorized operation
Aesthetic type: Suitable for venues where appearance is important
Commercial Buildings: Shopping malls, office buildings, hotels, hospitals
Industrial Facilities: Factories, workshops, warehouses
Residential Projects: Apartment buildings, villas, residential complexes
Public Facilities: Schools, airports, stations, ports
Infrastructure: Water treatment plants, communication base stations
Our DB/SDB distribution boards are designed and manufactured in accordance with international standards, undergoing strict quality control processes to ensure each product meets relevant safety standards. We provide professional technical support, fast delivery and comprehensive after-sales service, offering reliable power distribution solutions for global customers.
Q1: What is the main difference between a DB (Distribution Board) and an SDB (Sub-Distribution Board) in your product line?
A: In our product lineup, a Main Distribution Board (DB) usually receives power directly from the transformer or main LV panel and distributes it across a building. A Sub-Distribution Board (SDB) receives power from the main DB and further distributes it to specific zones or final lighting/power circuits. Both are manufactured with the same high-quality standards but vary in overall current capacity and incoming breaker sizes.
Q2: Do your DB and SDB units comply with international electrical standards?
A: Yes, all our distribution boards are designed and manufactured in strict accordance with the IEC 61439-3 standard, which specifies the requirements for distribution boards intended to be operated by ordinary persons (DBO). This ensures maximum safety, proper temperature rise limits, and reliable insulation.
Q3: Are your distribution boards designed for Single Phase (SPN) or Three Phase (TPN) systems?
A: We manufacture both. Our portfolio includes SPN (Single Phase and Neutral) distribution boards for standard residential use, and TPN (Three Phase and Neutral) boards for commercial and light industrial applications. We offer configurations ranging from 4-way up to 72-way, depending on your circuit requirements.
Q4: What materials do you use for the enclosure of the DB/SDB?
A: We prioritize durability. Our standard metal enclosures are made from high-quality Cold Rolled Closed Annealed (CRCA) steel or galvanized steel, finished with a rust-resistant epoxy polyester powder coating. For specific damp or corrosive environments, we also offer high-impact plastic (polycarbonate/ABS) or stainless steel (SS304/SS316) options.
Q5: Are your distribution boards compatible with international breaker brands like Schneider, ABB, or Siemens?
A: Yes. Our DBs and SDBs feature standard 35mm DIN-rails, making them universally compatible with standard Miniature Circuit Breakers (MCBs), Residual Current Devices (RCDs), and RCBOs from all major international brands, as well as reliable local brands.
Q6: Do you offer both flush-mounted and surface-mounted distribution boards?
A: Yes, we provide both designs to suit various architectural needs. Flush-mounted (recessed) boards are ideal for a clean, integrated aesthetic inside walls, while surface-mounted (wall-mounted) boards are perfect for industrial settings or retrofitting where wall modification is not preferred.
Q7: As a manufacturer, can you provide OEM/ODM services for our own brand?
A: Absolutely. We deeply support electrical wholesalers, distributors, and contractors. We can provide full OEM services, including custom brand logo printing (silk screen or laser engraving), customized packaging, specific color matching (RAL colors), and tailored internal layouts to help you build your local brand identity.
Q8: Can you pre-assemble the internal components (MCBs, busbars) before shipping?
A: Yes, we offer flexible delivery options. You can choose to purchase "empty enclosures" or request fully pre-assembled boards. If you choose pre-assembly, our factory will install the busbars, neutral/earth terminal blocks, and your preferred brand of breakers, fully wired and tested before shipment.
Q9: How do you ensure the powder coating on the metal enclosures won't peel off or rust quickly?
A: We utilize an automated, multi-step surface treatment process before painting, including degreasing, derusting, and phosphating. The enclosures then undergo high-temperature curing for the epoxy powder coating. This ensures strong adhesion, excellent scratch resistance, and long-lasting anti-corrosion performance, even in humid climates.
Q10: How are the distribution boards packaged for bulk container shipping?
A: To optimize shipping costs and ensure product safety, we use durable, export-grade corrugated cartons with inner foam protection to prevent scratching and dents. For bulk FCL (Full Container Load) orders, we meticulously palletize and shrink-wrap the goods, ensuring stable and damage-free transit to your warehouse.
