Explore our certified low-voltage distribution devices engineered for structural safety, environmental stability, and operational efficiency.
Driving the continuous progress of power distribution and control technology through eco-compliant manufacturing and engineering integrity.
Founded in 2013, Wenzhou OFA Electrical Technology Co., Ltd. has established itself as an authoritative force in the specialized production of distribution switchgear, control equipment, and low-voltage electrical protection accessories. Rooted in Yueqing, Wenzhou—universally recognized as the "Capital of Electrical Appliances in China"—OFA seamlessly leverages the world's most concentrated electrical manufacturing industrial chain to deliver premium, reliable solutions.
Operating under our independent proprietary brand "OFA", our solution matrix serves critical global sectors including utility infrastructure, renewable energy, industrial automation, commercial construction, and equipment manufacturing. We adhere strictly to honest, transparent operations and have been officially rated as Tax Credit Grade A for seven consecutive years, earning deep-seated trust from engineering partners worldwide.
Navigating regulatory imperatives, hazardous substance restriction, and supply chain decarbonization in low-voltage electrical apparatus.
In modern industrial power distribution, compliance with the Restriction of Hazardous Substances (RoHS) Directive—specifically EU Directive 2011/65/EU and its expanding amendment (EU) 2015/863 (RoHS 3)—is no longer merely a regulatory check-item. It represents a fundamental benchmark of engineering ethics, product longevity, and environmental risk mitigation. For OEM buyers, EPC contractors, and global system integrators, procuring certified RoHS-compliant circuit breakers (MCB, MCCB, ACB, RCBO) safeguards end-user safety while eliminating severe legal liabilities in strictly regulated markets across North America, Europe, and the Asia-Pacific.
OFA Electrical enforces comprehensive control over the ten restricted substances, maintaining rigorous thresholds:
Every shipment originating from OFA's Yueqing manufacturing facility undergoes batch X-ray Fluorescence (XRF) spectroscopy screening. We issue complete Material Safety Data Sheets (MSDS) and RoHS Certificates of Compliance (RoHS CoC) linked directly to factory batch serial numbers, giving global procurement officers 100% audit confidence.
Global electrical buyers face a dual challenge: maintaining strict compliance with evolving environmental standards while mitigating supply chain disruption risks. In response, modern B2B procurement strategies prioritize manufacturers offering:
Full cross-compatibility with IEC/EN 60947 series (industrial switchgear) and IEC/EN 60898 series (household & commercial protection).
In-house testing facilities for mechanical endurance, temperature rise limits, dielectric breakdown voltage, and trip curve accuracy.
Flexible production lines capable of handling both high-volume standardized product runs and specialized OEM/ODM customizations.
Tailored low-voltage distribution frameworks designed to meet harsh operational demands across critical modern infrastructure.
Photovoltaic installations demand specialized DC circuit protection capable of extinguishing high-voltage DC arcs. OFA delivers high-capacity DC Molded Case Circuit Breakers (such as the OF1-250/PV DC series) optimized for array junction boxes, central inverters, and battery racks up to 1500V DC.
Electric vehicle charging stations require ultra-sensitive residual current protection against smooth DC fault currents. Our Type A and Type B RCBO and RCCB series prevent nuisance tripping while guaranteeing immediate disconnection during earth leakage faults.
Automated assembly lines feature continuous high-inductance motor loads. OFA’s heavy-duty MCCB and ACB series offer adjustable thermal-magnetic and electronic trip units to protect sensitive PLC cabinets, variable frequency drives (VFDs), and heavy machinery.
Uninterrupted uptime is paramount in commercial towers and data infrastructure. Our high-breaking capacity MCBs (10kA/15kA) and Intelligent Air Circuit Breakers ensure flawless selective discrimination, isolating localized faults without shutting down main distribution buses.
Compact, space-saving miniature breakers (such as the OFDZ47 and OF6KA series) combine overcurrent, short-circuit, and fire hazard protection in sleek DIN-rail modular packages optimized for residential consumer units.
Built to withstand tropical humidity, extreme thermal cycling, and continuous vibration, OFA switchgear supports municipal power upgrades, airport terminals, and rail transit distribution stations worldwide.
Engineered with precision for absolute electrical reliability and global compliance.
Designed for main distribution lines from 16A to 1600A. Features electronic micro-processor trip units, high ultimate short-circuit breaking capacity (Icu up to 100kA), and modular auxiliary contacts.
Modular 1P, 2P, 3P, and 4P breakers engineered for terminal protection. Features precision bimetallic thermal overload tripping and instant electromagnetic short-circuit protection.
High-frame universal circuit breakers serving as main incoming breakers. Integrated with smart network communication (Modbus/RS485), real-time metering, and harmonic analysis.
Dedicated direct-current and alternating-current earth leakage protection devices. Safeguards human life against direct electrical contact and prevents fire hazards caused by insulation deterioration.
All-in-one protection devices integrating earth-leakage tripping with traditional overload and short-circuit protection in a single compact footprint.
Heavy-duty main disconnect switches providing visible physical contact separation for safe maintenance and electrical isolation under load conditions.
Inside OFA's state-of-the-art Yueqing production complex: How we guarantee zero out-of-factory defect rates.
Our engineering team focuses on continuous mechanical and arc-extinguishing refinements. Equipped with full-process type testing equipment, we conduct continuous verification of mechanical endurance (up to 20,000 operations), temperature rise limits, and insulation breakdown thresholds.
We have integrated automated component riveting, digital tripping verification stations, and laser-marking lines. Every assembly stage is subject to strict in-process control (IPQC), eliminating human error and maintaining identical tolerance precision across large order batches.
Unlike factories relying solely on statistical sampling, OFA enforces a 100% full-inspection Standard Operating Procedure for all finished units. Every single breaker is factory-tested for instant magnetic trip calibration, thermal delay accuracy, and dielectric strength before packaging.
Pioneering the next era of smart power automation, real-time telemetry, and eco-sustainable manufacturing.
Integration of low-power microcontrollers and wireless communication protocols (Zigbee, Matter, RS485 Modbus) directly inside DIN-rail MCB bodies. Enables real-time current, voltage, and temperature telemetry sent directly to cloud platforms for active predictive maintenance.
Advancing semiconductor switching technologies paired with traditional mechanical isolation. Solid-state breaking provides microsecond-level fault isolation (under 10 microseconds), virtually eliminating electrical arcing and extending contact lifespans by 100x.
Achieving 100% bio-based thermomolded housing compounds, complete lead-free and halogen-free supply chain integration, and solar-powered factory operations to deliver net-zero embodied carbon electrical components.
How OFA collaborates with EPC contractors, OEM equipment manufacturers, and system integrators worldwide.
Target: Fast implementation, proven standard products, cost optimization, rapid delivery.
Target: Complex industrial systems, custom enclosures, non-standard operating parameters, high redundancy.
Read why leading international engineers and facility managers depend on OFA electrical components.
"As a system integrator, our company has collaborated with OFA on several industrial automation projects. Their product range is comprehensive—covering everything from protective relays to communication gateways, which simplifies our procurement. Product quality is consistent, reducing commissioning hassles."
"We purchased OFA's intelligent power monitoring devices to upgrade the power distribution system in our workshop. Setup was simpler than expected, and integration went smoothly. Most importantly, they have run stably for over a year, helping us identify unnoticed energy anomalies."
"Deploying OFA's energy efficiency management system for several office buildings we manage was a wise decision. The system helped us gain detailed insights into usage in different areas and achieve energy savings through optimized operational strategies. Support team is highly responsive."
"Our PV project required reliable communication management and data acquisition equipment. OFA's products met our core needs at a reasonable price and adapted to our local outdoor environment. Their engineers provided excellent remote configuration guidance."
Engaging with global partners to showcase next-generation safe, green electrical products.
Everything you need to know about our RoHS compliance, manufacturing capabilities, ordering logistics, and technical support.
Complete your power distribution architecture with our precision-engineered circuit breakers and disconnectors.
OFA Electrical
