Explore our core series of high-performance RCCBs, Earth Leakage Circuit Breakers, and OEM Miniature Circuit Breakers manufactured to rigorous international standards.
Founded in 2013, Wenzhou OFA Electrical Technology Co., Ltd. is positioned at the epicentre of China's electrical manufacturing sector in Yueqing, Wenzhou—universally recognized as the Capital of Electrical Appliances in China. Operating under our flagship proprietary brand "OFA", we specialize in the end-to-end design, custom OEM/ODM manufacturing, and global deployment of distribution switchgear, industrial control equipment, and low-voltage circuit protection components.
Our technical engineering operations bridge classic physical circuit protection with intelligent energy management. Upheld by law-abiding operations and having maintained a Tax Credit Grade A rating for seven consecutive years, OFA has established long-term strategic partnerships across 50+ countries. We empower EPC contractors, industrial automation integrators, panel builders, and energy developers with high-reliability power infrastructure.
Unlocking unprecedented cost-efficiency, rapid prototyping, and vertical quality control through China's most advanced low-voltage electrical manufacturing cluster.
Located in Yueqing, OFA benefits from immediate physical access to raw material processing (high-purity electrolytic copper, silver-nickel alloy contact points, flame-retardant PA66 and BMC plastics). This proximity eliminates multi-tier procurement latency, enabling us to offer premium components at highly competitive factory-direct pricing.
Our production facilities utilize automated assembly lines, digital inspection stations, and continuous optical alignment systems. By enforcing full-process standardized operating procedures (SOPs), we maintain tight dimensional tolerances, steady mechanical endurance, and extremely low factory defect rates.
From custom trip curve settings (B, C, D, K, Z characteristics) to customized enclosure branding, specialized voltage ratings (DC 250V to DC 1500V, AC 230V to AC 1000V), and tailored terminal busbar layouts, our engineering team converts custom project parameters into market-ready equipment rapidly.
OFA engineers multi-tier protective devices designed for full-spectrum industrial automation, commercial switchboards, smart home panels, and renewable energy networks.
Designed to make, carry, and interrupt currents under normal conditions and automatically sever heavy fault currents during short circuits or overloads up to 1600A. Series include BA88 Electronic, DCM1, DCOF1, OFM1, OFBLT (DC Series), OF1, and OFA-M1.
The fundamental line of defense for sub-circuit protection in residential, commercial, and industrial automation sub-panels. Product lines span OF6KA, OF10KA C65, OFAFT, OFD4Z7, OFDL, OFDP, OFDZ47, OFEU, OFKL, OFKL-NXB, OFL7, OFL8, OFNC, OFPF, and OFP series.
High-current power distribution guardians for main low-voltage switchgears in industrial plants and commercial complexes. Featuring the flagship OFW1 Intelligent Universal Circuit Breaker series with micro-processor control units.
Specialized earth leakage protective devices designed to prevent fatal electric shocks and electrical fires resulting from insulation deterioration. Models cover OFAP6-AC, OFDPN, OFDX, OFGX, OFID, OFL7, and OFPM series.
All-in-one integrated protective units combining overcurrent, short-circuit, and earth leakage safeguards in a streamlined single-module design. Models include OFC, OFKL-80A, NB1L, OFMIN, OFOM, and OFR1 series.
Heavy-duty circuit isolators designed to ensure safe electrical isolation during maintenance and switching operations. Featuring the OFIS-125A, OFIS-BH, and OFIS-DS Series designed for heavy industrial load breaking.
Mitigating cross-border operational risk by adhering strictly to global electrical safety standards and quality management frameworks.
Overseas buyers and international EPC contractors demand rigorous compliance when selecting an OEM manufacturer. At OFA, every batch of circuit protection equipment undergoes end-to-end quality verification prior to dispatch.
All products conform to key international standards including IEC/EN 60947 (low-voltage switchgear), IEC/EN 60898 (circuit breakers for household and similar installations), CE mark, CCC certification, and ISO9001 quality management guidelines.
Our internal testing laboratory executes comprehensive verification of mechanical life, temperature rise under rated currents, dielectric insulation strength, instantaneous magnetic tripping calibration, and short-circuit withstand capabilities.
We perform specialized environmental testing (salt spray anti-corrosion, high ambient temperature endurance up to 70°C, high humidity resistance) to ensure seamless performance in desert solar farms, coastal marine environments, or extreme tropical industrial facilities.
How OFA integrates AI, IoT connectivity, DC power distribution, and green manufacturing into next-generation industrial automation systems.
Transitioning from passive tripping (responding only after a short-circuit occurs) to active prediction. Microprocessor-embedded switchgear continuously tracks real-time thermal curves and harmonic distortion to alert operators before failure occurs.
With the exponential growth of Solar PV networks and Battery Energy Storage Systems (BESS), DC protection is vital. Our specialized DC Molded Case Circuit Breakers (such as the OFBLT 250HU) operate at up to 1500V DC with dedicated magnetic arc-extinguishing chambers.
Modern distribution switchgears require native connectivity. OFA smart ACB and MCB ranges integrate standard Modbus-RTU, Ethernet, and wireless gateways to seamlessly stream energy analytics into centralized building management systems (BMS) and SCADA clouds.
In response to global decarbonization, OFA incorporates recyclable halogen-free polymers and eco-friendly contact alloys. Efficient manufacturing reduces energy intensity per unit while maintaining compliance with RoHS and REACH standards.
Engineered for high adaptability across industrial plants, utility infrastructure, smart buildings, and renewable power systems.
Providing heavy-duty motor circuit protection, automated main power switching, and surge isolation for CNC workshops, automated assembly lines, and chemical processing facilities where zero unexpected downtime is required.
High-breaking-capacity MCCB and intelligent ACB setups ensure selective protection for uninterruptible power supply (UPS) systems, server rack distribution units (PDUs), and HVAC cooling systems in critical data infrastructure.
Specialized high-voltage DC circuit breakers and isolator switches safeguard inverter combiner boxes, solar arrays, and containerized battery storage banks against reverse currents and DC arc faults.
Type A and Type B Residual Current Circuit Breakers (RCCB/RCBO) provide essential protection against smooth DC residual leakage currents in fast-charging DC piles and commercial AC EV charging hubs.
Modular miniature circuit breakers (MCBs) and isolators power sub-distribution panels across shopping centers, hospital complexes, and commercial towers with clear visual indication and reliable isolation.
Deploying robust low-voltage distribution switches and switchgear components across municipal water treatment works, subway transport networks, airport terminals, and smart microgrid installations.
A transparent, engineering-led process designed to take your electrical distribution requirements from concept to site commissioning seamlessly.
Ideal for standard industrial/commercial retrofits, distribution panel builds, and fast-turnaround distributor stocking orders.
Tailored for specialized machinery manufacturers, high-capacity switchboard builders, and major international infrastructure developments.
Discover why system integrators, plant engineers, and electrical distributors depend on OFA for operational safety.
"As a system integrator in Poland, we collaborated with OFA on several industrial automation revamps. Their product scope is exceptionally wide—from MCBs to motorized MCCBs. Product consistency has eliminated on-site commissioning delays."
"We procured OFA intelligent power monitoring breakers to retrofit our plant distribution boards. The installation was straightforward, and their thermal stability over 18 months of continuous production has been outstanding."
"For our 15MW ground-mounted PV and energy storage site, OFA delivered custom DC circuit breakers with precise voltage specs. Remote engineering guidance via technical video conferences was prompt and highly competent."
Clear engineering and commercial answers regarding OFA products, manufacturing capabilities, and global partnership terms.
Explore our specialized 1P/3P MCBs, high-amp isolator switches, molded case circuit breakers, and DC power protection devices.
OFA Electrical
