Explore our high-performance circuit protection hardware designed for seamless integration with SCADA architectures, smart panels, and industrial control cabinets.
In modern industrial manufacturing, power automation is no longer merely about stepping down voltages or isolating overloads. The rapid evolution of Industry 4.0, edge computing, smart microgrids, and high-density data networks demands an integrated ecosystem where supervisory control, physical circuit switching, and telemetry act as one synchronized unit.
Founded in 2013 in Yueqing, Wenzhou — the acknowledged Capital of Electrical Appliances in China — Wenzhou OFA Electrical Technology Co., Ltd. has established itself as an authoritative leader in low-voltage distribution switchgear, control equipment, and intelligent circuit protection. Operating under our proprietary brand "OFA", we empower global system integrators, EPC contractors, and automation OEMs with high-end electrical components optimized for complex SCADA (Supervisory Control and Data Acquisition) networks.
By bridging physical power hardware (MCCB, MCB, ACB, RCBO, IS) with telemetry-ready interfaces and predictive safety mechanisms, OFA guarantees that industrial power architectures remain stable, resilient, and compliant under demanding operational stresses.
Comprehensive electrical components engineered for breaking capacity precision, thermal stability, and remote control integration.
Serving as primary circuit isolation and protective backbones, our electronic and thermal-magnetic MCCBs (including BA88, DCM1, DCOF1, OFM1, and BLTM3DC series) manage, carry, and break load currents under normal conditions while offering instantaneous trip responses during abnormal short circuits and severe overloads.
At the terminal protection layer of automated control cabinets, OFA’s DIN-rail MCB lineups (OF6KA, OF10KA C65, OFAFT, OFDZ47, OFEU, OFKL) guarantee precision tripping. Engineered with advanced arc-chute quenching plates and silver-alloy contact points to maximize mechanical life cycles.
OFA’s RCBO (OFC, NB1L, OFKL-80A, OFMIN) and RCCB (OFAP6-AC, OFDPN, OFID) series combine overload, short-circuit, and high-sensitivity earth leakage current protection (10mA - 300mA). Protecting personnel and sensitive automated machinery from subtle ground fault leakage currents.
Engineered as high-capacity main power intake guardians for manufacturing plants, data centers, and heavy infrastructure. Our OFW1 Intelligent Universal ACB series features micro-processor controlled trip units supporting real-time power quality monitoring and Modbus/Profibus telemetry directly into master SCADA software.
The IS Series (OFIS-125A, OFIS-BH, OFIS-DS) innovatively merges the robust mechanical isolating functions required for emergency safety shutoffs with compact DIN-rail mounting structures, guaranteeing visible physical disconnect gaps during field maintenance.
Custom-engineered control panels integrating IoT gateways, intelligent metering, remote shunt trip modules, and protective relays tailored specifically to OEM client specifications and international switchgear enclosure standards.
How OFA leverages China’s largest low-voltage electrical manufacturing cluster to deliver unmatched quality, scale, and cost-efficiency.
Global procurement directors face continuous pressures to lower Capital Expenditures (CapEx) while mitigating operational downtime risks. Rooted in Yueqing, Wenzhou — the industrial heartland responsible for over 60% of China’s electrical apparatus production — OFA provides direct access to a world-class manufacturing supply chain network.
Unlike secondary assembly vendors, OFA controls every tier of production. From raw copper and silver-contact stamping, thermoplastic housing injection, bimetallic trip strip calibration, to automated ultrasonic welding — our localized ecosystem minimizes component lead times and eliminates vendor markup fees.
Cost efficiency never comes at the expense of engineering integrity. Every individual circuit breaker leaving our factory undergoes 100% full-inspection Standard Operating Procedures (SOPs): magnetic instant-trip verification, thermal trip calibration, dielectric voltage withstand testing, and contact resistance measurement.
Whether you require a batch of specialized 1500V DC MCCBs for a pilot solar farm or thousands of customized MCBs for global commercial distribution, our lean automated assembly lines switch seamlessly between high-mix low-volume (HMLV) orders and massive OEM production runs.
Engineering low-voltage switchgear components certified to international standards for effortless global market access.
OFA components are engineered and tested in accordance with international electrotechnical norms, including IEC/EN 60947-2 (industrial breakers), IEC/EN 60898-1 (residential/commercial protection), and IEC 61009-1 (RCBOs). Ensuring hassle-free acceptance by regional inspectors worldwide.
Our plant operates under certified ISO9001 Quality Management Systems. Products carry full CE, CCC, and RoHS certifications, guaranteeing environmentally friendly manufacturing compliance (low cadmium, lead-free contacts) alongside electrical safety guarantees.
Exporting to over 50 countries across Europe, South America, Southeast Asia, and the Middle East. We provide specialized maritime/air export packaging, complete custom harmonization codes (HS codes), certificate of origin documentation, and flexible Incoterms (FOB, CIF, DDP).
Transitioning from traditional passive breaker tripping to active telemetry, IoT forecasting, and automated fault isolation.
Historically, circuit breakers acted as silent, passive observers — tripping only after a catastrophic thermal overload or destructive short-circuit occurred. Modern SCADA architectures require continuous real-time data monitoring.
By integrating shunt trip coils, auxiliary telemetry contacts, and smart current transducers into OFA breaker panels, operators can monitor contact temperature degradation, load balance, and micro-leakage currents via Modbus RS-485 or Ethernet gateways. Potential electrical failures are flagged in the SCADA HMI long before downtime occurs.
With the global surge in distributed Solar Photovoltaic (PV) installations and Battery Energy Storage Systems (BESS), direct current (DC) switching has become a critical operational challenge. DC arcs do not possess a natural zero-crossing point, making arc quenching significantly harder than AC breaking.
OFA’s specialized DC Molded Case Circuit Breakers (such as the BLTM3DC-250HU series) incorporate multi-stage magnetic arc blow-out channels and high-durability contact alloys, handling voltages up to 1500V DC safely and efficiently within automation environments.
Versatile electrical control solutions deployed in mission-critical environments worldwide.
Protecting automated conveyor lines, CNC machining centers, and robotic assembly cells with selective overcurrent matching.
High-voltage DC isolation circuit protection for combiner boxes, central inverters, and battery storage banks (BESS).
Ensuring uninterruptible power supply (UPS) distribution with ultra-fast fault isolation preventing wide-area IT blackouts.
Deploying Type A/B RCBO ground-fault protection in DC fast-charging stations and commercial parking garages.
Inside our state-of-the-art Yueqing manufacturing plant, testing labs, and assembly lines.
See why global system integrators, plant managers, and EPC engineers rely on OFA for electrical automation.
A structured, engineering-driven collaborative framework for smooth project execution.
Review standard product data sheets or submit your single-line diagram (SLD). Our engineers match mature, validated breaker configurations instantly.
OFA generates clear technical schematics, bill of materials (BOM), and transparent factory-direct pricing with guaranteed lead times.
Standardized ISO9001 assembly and 100% routine testing ensures rapid shipment dispatch with complete test reports.
Our senior R&D and solution engineers collaborate via technical workshops to analyze network protocols (Modbus, BACnet) and electrical constraints.
We conduct pre-commissioning simulation in our laboratory, verifying communication gateway signals with your SCADA master software.
Providing remote debugging guidance, full documentation, operator training, and continuous predictive maintenance data insights.
Get immediate, authoritative answers regarding OFA's capabilities, OEM solutions, and technical specifications.
Explore our extended series of high-performance residual current, DC molded case, and heavy-duty isolating circuit breakers.
OFA Electrical
