High-performance protective switchgear certified for global smart grid, commercial, and industrial deployments.
Wenzhou OFA Electrical Technology Co., Ltd. — Professional Manufacturer from the Capital of Electrical Appliances in China.
Founded in 2013, Wenzhou OFA Electrical Technology Co., Ltd. is rooted in Yueqing, Wenzhou — the world-renowned center of low-voltage electrical apparatus manufacturing. Owning proprietary brand architecture such as "OFA", our product portfolio spans critical industries including smart power distribution, renewable energy integration, industrial automation, commercial building management, and OEM/ODM custom equipment manufacturing.
We are committed to enabling power systems to operate safer, smarter, and greener. By unifying hardware innovation with cloud telemetry, OFA integrates industry best practices, state-of-the-art R&D, and ISO9001-certified quality assurance to deliver robust protection switchgear across 50+ countries worldwide.
Transforming conventional mechanical overcurrent protection into intelligent, real-time edge telemetry and automated power optimization nodes.
Traditional Miniature Circuit Breakers (MCBs) rely exclusively on bi-metallic strips for thermal overload protection and electromagnetic coils for instantaneous short-circuit protection. While reliable for catastrophic isolation, they lack data logging, remote control, or predictive health diagnostic capabilities.
Integration of 2.4GHz WiFi microcontrollers, motor-driven latching relays, and SPI-bus metering ICs. Allows remote trip/close execution via mobile applications (Tuya, eWeLink, MQTT) and basic voltage/current monitoring, shifting operations from reactive to remote control.
The current pinnacle of OFA WiFi Circuit Breakers. Features internal zero-crossing contact switching to eliminate electrical arcing during trip cycles, embedded ARM Cortex MCU for on-device harmonic sampling (0.5% class energy metering accuracy), and encrypted OTA firmware updating protocols.
Our smart WiFi switchgear engineered for global OEM/ODM integration incorporates high breaking capacity mechanisms with modular IoT communications:
WiFi 2.4GHz (802.11 b/g/n), RS485 Modbus-RTU dual-channel, Bluetooth pairing, Matter-compliant ready.
6kA to 10kA according to IEC 60898-1 / IEC 60947-2 standards, continuous rated operational voltage (Ue) 1P/2P 230V, 3P/4P 400V.
Real-time voltage, current, active power, reactive power, power factor, device temperature, and residual earth leakage current (mA).
Physical mechanical safety lock latch for zero-voltage maintenance work. Flame retardant V0 grade anti-combustion polycarbonate casing.
Tailored low-voltage distribution and intelligent power management across complex operational environments.
Automated sub-metering, scheduling, and load balancing across multi-tenant commercial real estate. Remote scheduled switching minimizes non-operational energy waste, while instantaneous overcurrent alerting prevents major downtime.
Specialized DC Molded Case Circuit Breakers (such as our OFBLT Series) and smart AC coupling breakers designed for PV inverters, combiner boxes, and lithium battery banks featuring high-DC-voltage arc quenching capabilities up to 1500V DC.
Protecting fast EV charging infrastructure requires combined residual current (Type A/B RCCB/RCBO) and smart load management. OFA switchgear ensures complete protection against smooth DC residual leakage currents and sudden load spikes.
High-reliability Air Circuit Breakers (ACB) and Miniature Circuit Breakers operating under strict selectivity rules to isolate fault zones without tripping main enterprise power trunks. Integrated SCADA / Modbus telemetry ensures 24/7 uptime monitoring.
Engineered to satisfy rigorous international electrical distribution, protection, and isolation specifications.
Designed to make, carry, and break currents under normal circuit conditions, and interrupt specified abnormal overload/short-circuit conditions up to 1600A.
The space-saving baseline protection standard for branch terminal circuits, preventing catastrophic thermal runaway and short circuits in residential and commercial sub-panels.
High-ampere master switchboards engineered for industrial power plants, transformers, and main utility step-down rooms requiring deep micro-processor intelligence and selective trip coordination.
Specialized life-safety earth leakage breakers preventing fatal electric shock hazards and fire outbreaks caused by earth fault insulation degradation.
Main disconnect isolators combining heavy-duty switching contacts with unambiguous visual break indicators for safe electrical maintenance isolation.
Yueqing Production Base — High-Precision Automation & Zero-Defect Tolerance Standard SOPs.
At Wenzhou OFA Electrical Technology Co., Ltd., product reliability is non-negotiable. Our production facilities operate under strict 100% full-inspection Standard Operating Procedures (SOPs), ensuring every component—from silver alloy contacts and arc-extinguishing grids to micro-actuator coils—meets rigorous international benchmark testing.
By leveraging automated SMT PCB assembly lines, laser marking, digital calibration benches, and automated mechanical life testers, OFA provides global enterprise procurement partners with high-volume production output, rapid lead-time execution, and stable factory-direct pricing without sacrificing technical precision.
Thermogravimetric testing of flame-retardant polymers and purity testing of copper/silver contact points.
Automated thermal-magnetic tripping curve testing across 1.13Ir, 1.45Ir, and instantaneous magnetic threshold boundaries.
100% high-voltage dielectric withstand testing, contact resistance measurement, and remote WiFi OTA pairing test.
Whether acquiring standardized energy management switchgear or engineering custom IoT control products, our structured workflows ensure effortless delivery.
Review specifications, terminal load limits, breaking capacities, and match proven standard model frameworks.
OFA engineers deliver single-line electrical diagrams (SLD) and bill of materials (BOM) configurations.
Transparent pricing models. Fast-track production using standard factory-stocked raw components.
Complete wiring documentation, remote installation guidance, and parameter setting support.
Pre-defined acceptance sign-off ensuring long-term operational stability and continuous energy savings.
Joint technical consultation between client R&D and OFA engineering leads to set system boundaries.
Custom plastic mold tooling, PCB layout customization, and cloud protocol tailoring (MQTT/Tuya/HTTP).
Type verification covering EMC isolation, short-circuit breaking verification, and thermal temperature rise tests.
Assigned project managers oversee integration with client SCADA, DCS, or smart home platforms.
Full technical documentation, operator training, standard warranty protection, and remote OTA upgrades.
See why global engineering leaders rely on OFA for their mission-critical power management needs.
"As a system integrator, our company has collaborated with OFA on several industrial automation projects. Their product range is quite comprehensive, covering everything from protective relays to communication gateways, which simplifies our procurement and integration work. The product quality is consistent, reducing on-site commissioning hassles."
"We purchased OFA's intelligent power monitoring devices to upgrade the power distribution system in our old workshop. The installation and setup were simpler than expected, and integration with our existing system went smoothly. Most importantly, they have been running very stably for over a year, and the electricity data provided helped us identify previously unnoticed energy consumption 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 electricity usage in different areas and achieve energy savings through optimized operational strategies. Their online support team is responsive and effectively answers our questions."
"Our PV project required reliable communication management and data acquisition equipment. OFA's products met our core needs at a reasonable price and could adapt to our local outdoor environment. Their engineers provided excellent configuration guidance via email and video calls during the initial phase."
In-depth answers to common engineering, procurement, and integration inquiries.
Industrial molded case switches, residual current devices, and specialized distribution accessories.
OFA Electrical
