Explore our core selection of precision-engineered Miniature Circuit Breakers (MCB), Molded Case Circuit Breakers (MCCB), and DC Solar Components.
Wenzhou OFA Electrical Technology Co., Ltd. delivers robust, intelligent switchgear solutions engineered for demanding global applications across industrial, renewable, and commercial sectors.
Founded in 2013 in Yueqing, Wenzhou—the renowned epicenter of low-voltage electrical component manufacturing—Wenzhou OFA Electrical Technology Co., Ltd. has grown into an authoritative provider of distribution switchgear and control gear assemblies. Under our proprietary brand "OFA", we operate state-of-the-art facilities dedicated to R&D, precision assembly, and rigorous testing.
Trust and transparency form the bedrock of our business. OFA has been rated as Tax Credit Grade A for seven consecutive years, demonstrating complete operational integrity. Our engineering processes conform strictly to ISO9001 quality management guidelines, ensuring every component meets global benchmark standards including CE, IEC, and CCC certifications.
Transitioning from passive arc fault isolation to active, telemetry-driven microgrid management.
Modern electrical infrastructure demands zero unscheduled downtime. OFA integrates solid-state current sensing and digital microprocessors directly into our Air Circuit Breakers (ACB) and Molded Case Circuit Breakers (MCCB). This facilitates real-time data acquisition for transient overvoltage, phase imbalance, and ground fault harmonics.
Moving beyond standard thermal-magnetic curve limits, our smart breaker architecture utilizes predictive thermal algorithms. By sampling temperature rise continuously under high harmonic loads (e.g., VFDs and industrial rectifiers), systems trigger preventive alerts prior to catastrophic insulation degradation.
The global shift toward distributed renewable energy requires high-breaking capacity DC protection. OFA’s dedicated DCOF1 and BLTM3DC Series deliver ultimate short-circuit breaking capacity (Icu) up to 250A/1500VDC, featuring zero-arc chamber geometries specialized for energy storage containers and solar PV strings.
Designed for seamless integration into industrial control panels, motor control centers (MCC), and building power networks.
Engineered for primary circuit distribution. Protects main feeder circuits against overload and short-circuits from 16A up to 630A. Features adjustable thermal-magnetic trip units, high-dielectric strength enclosures, and full compatibility with electronic trip modules (OFA-M1, BA88, DCM1, DCOF1, OFM1, and OFBLT Series).
Compact, DIN-rail mounted protection solutions for terminal distribution boards. Offers 6kA and 10kA short-circuit breaking capabilities across B, C, and D tripping characteristics. Covers single to multi-pole variations (OF6KA, OF10KA C65, OFAFT, OFD4Z7, OFDL, OFDP, OFDZ47, OFEU, OFKL, OFL7, OFL8, OFNC, OFPF, OFP).
Serving as the main incoming incoming breaker in low-voltage power networks. Our OFW1 Series intelligent universal circuit breaker provides selective protection up to 6300A, featuring open-architecture Modbus/Profibus communication interfaces, harmonic waveform analysis, and remote motorized tripping operations.
Specialized electro-magnetic residual current detection designed to safeguard personnel against direct contact electric shock and protect assets against fire risks caused by earth fault leakage currents (OFAP6-AC, OFDPN, OFDX, OFGX, OFID, OFL7, OFPM Series).
All-in-one protection combining earth leakage, overload, and short-circuit protection within a single modular space. Reduces control cabinet wiring complexity and enhances system troubleshooting agility (OFC, OFKL-80A, NB1L, OFMIN, OFOM, OFR1 Series).
Engineered for positive galvanic isolation during safe maintenance operation. OFIS-125A, OFIS-BH, and OFIS-DS Series provide high breaking capacity load switching with visible contact status windows and lockable toggle mechanisms.
How Wenzhou OFA leverages Yueqing’s complete industrial cluster to provide global buyers with speed, agility, and cost-defying reliability.
Our modern Yueqing manufacturing base integrates semi-automated assembly fixtures and digital inspection stations. By converting manual assembly points into standard operating procedures (SOPs), we enforce 100% full inspection across mechanical lifespan, temperature rise limits, and instantaneous trip accuracy.
Operating inside Wenzhou's famous electrical cluster allows OFA to source premium silver alloy contacts, flame-retardant PC/ABS housings, and precision copper coils within minutes. This supply chain proximity lowers raw material overhead and ensures rapid adaptation to customer design tweaks.
Located near Ningbo and Shanghai sea ports, OFA handles high-volume urgent orders seamlessly. We provide fully compliant export packaging, containerized palletization, and direct customs clearing support to keep global client construction deadlines on schedule.
From residential sub-panels to heavy industrial process plants, our components guarantee reliable protection and seamless automated control.
Our dedicated DC Molded Case Circuit Breakers (such as the DCOF1-250/PV and BLTM3DC-250HU) handle high DC working voltages up to 1500V. Designed specifically to isolate energy storage racks and solar string inverters under intense ambient thermal fluctuations.
Uninterrupted uptime requires zero-nuisance tripping components. OFA supply high-sensitivity RCBOs and intelligent ACBs that prevent harmonic false tripping while providing instantaneous isolation against transient ground surges.
Equipped to handle high inrush currents and pulsating DC residual current leakage, our Type A and Type B RCCB configurations deliver robust security for public and commercial EV charging hubs.
Complete DIN-rail MCB and Isolator (IS Series) combinations for multi-story office towers, shopping malls, and municipal facilities. Ensuring load balance, easy maintenance access, and modular expansion capabilities.
Industrial panel builders rely on our robust MCCBs (OFA-M1 & OFM1) to isolate heavy motor drives, automated conveyor systems, and CNC machinery against short circuits and prolonged electrical overloads.
Serving municipal water treatment plants, rail transit switchyards, and smart microgrids with full SCADA-compatible air circuit breakers and automated remote reclosing breakers.
Whether you need standard component inventory or complex OEM/ODM product customization, OFA simplifies the procurement journey.
Step 1: Requirement Alignment: Submit your single-line diagrams or equipment bill of materials (BOM). Our engineering team matches component specs.
Step 2: Benefit Simulation & Quote: Receive transparent pricing, short-circuit rating validations, and guaranteed delivery timelines.
Step 3: Agile Production & Delivery: Standard items shipped rapidly from ready stock with full mill test certificates and factory routine test reports.
Step 1: Deep Technical Consultation: Collaborative engineering sessions to establish custom housing dimensions, special tripping curves, or custom branding.
Step 2: Prototype Verification: Rapid 3D physical sampling, thermal rise verification, and type-testing under laboratory conditions.
Step 3: Lifecycle Collaborative Support: Engineering assistance throughout installation, commissioning, and on-site acceptance testing.
Read how leading international system integrators and facility maintenance managers rely on OFA for operational safety.
"As a system integrator in Poland, we collaborated with OFA on several industrial automation projects. Their product range covers everything from miniature breakers to communications gateways, simplifying our procurement. Quality is consistently high."
"We purchased OFA's intelligent power monitoring devices to retrofit our manufacturing plant in Germany. The installation was simple, and integration went smoothly. They have operated stably for over a year."
"Deploying OFA's energy efficiency management system across our commercial property portfolio in Bangkok was a wise decision. The data clarity allowed us to trim baseline energy waste immediately."
"Our PV project in Chile required dependable DC protection equipment capable of withstanding extreme outdoor temperatures. OFA's DCOF1 series met all core parameters at a competitive price point."
Detailed technical, compliance, and ordering guidance from OFA's senior electrical engineering team.
Browse our additional standard miniature circuit breakers, isolating switches, and high-breaking capacity DC circuit protection units.
OFA Electrical
