Precision-engineered circuit protection components certified under strict EU Directive 2011/65/EU and (EU) 2015/863 guidelines. Fully compliant for worldwide deployment.
Founded in 2013, Wenzhou OFA Electrical Technology Co., Ltd. is rooted in Yueqing, Wenzhou — recognized worldwide as the Capital of Electrical Appliances in China. We operate as a premier technology enterprise specializing in the integrated R&D, advanced manufacturing, and strategic supply of distribution switchgear, control equipment, and low-voltage electrical accessories.
Under our independent brand "OFA", our solution matrix serves critical infrastructure across power utilities, renewable energy, industrial automation, commercial construction, and high-tech equipment manufacturing. Guided by our corporate core values of "Professionalism, Integrity, and Pragmatic Innovation", we hold an exemplary operational track record: rated as Tax Credit Grade A for seven consecutive years and fully certified under ISO9001 quality management systems.
As environmental directives expand globally from standard RoHS 2.0 to RoHS 3.0 (Directive EU 2015/863) and upcoming REACH SVHC additions, OEM factories must transition from basic hazardous substance avoidance to full-lifecycle material engineering.
Elimination of 10 primary restricted substances: Lead (Pb), Mercury (Hg), Cadmium (Cd), Hexavalent Chromium (Cr6+), PBBs, PBDEs, DEHP, BBP, DBP, and DIBP. OFA implements SAC305 (Sn96.5Ag3.0Cu0.5) lead-free soldering alloys and beryllium-free copper contact rivets to prevent contact resistance escalation while ensuring absolute environmental compliance.
Switchgear enclosures utilize engineering-grade Polycarbonate (PC) and Polyamide 66 (PA66) reinforced with halogen-free phosphorus-nitrogen flame retardants. This achieves UL94-V0 flammability ratings without releasing toxic dioxins or corrosive hydrogen chloride gases during high-temperature electrical arcing faults.
Incoming raw materials undergo rigorous X-ray Fluorescence (XRF) spectrometry analysis. High-precision Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) and Gas Chromatography-Mass Spectrometry (GC-MS) are employed to verify phthalates below 100 ppm, guaranteeing zero supply chain contamination.
| Restricted Chemical Substance | RoHS 3.0 Threshold Limit (ppm) | OFA Internal Quality Control Standard | Material Engineering Solution Applied |
|---|---|---|---|
| Lead (Pb) | < 1000 ppm (0.1%) | < 100 ppm (0.01%) | SAC305 Solder / High-Purity Electrolytic Copper |
| Cadmium (Cd) | < 100 ppm (0.01%) | < 10 ppm (0.001%) | Silver-Nickel (AgNi) & Silver-Tin-Oxide (AgSnO2) Contacts |
| Hexavalent Chromium (Cr VI) | < 1000 ppm (0.1%) | Undetectable | Trivalent Chromium (Cr III) Passivation Coating |
| Phthalates (DEHP, BBP, DBP, DIBP) | < 1000 ppm (0.1%) combined | < 50 ppm combined | Non-Phthalate Polymeric Plasticizers in Cable Seals |
By anchoring our manufacturing infrastructure in Yueqing’s world-leading electrical cluster, OFA integrates smart digital automation with resilient localized supply chains to deliver unmatched lead times, batch consistency, and cost-efficiency.
Our automated assembly lines incorporate digital vision inspection stations that verify component alignment, rivet torque integrity, and arc-chute installation in real time, minimizing human error and defect rates out of the factory.
Every production batch undergoes strict SOP verification: mechanical life testing up to 20,000 operations, temperature rise evaluation under full load, dielectric withstand tests, and precision instantaneous trip response calibration.
With centralized access to raw material processing and specialized stamping facilities in Yueqing, we maintain agile production flexibility, handling high-volume standard orders and rapid OEM custom prototypes on tight deadlines.
From residential microgrid stability to industrial automation protection, our RoHS compliant low-voltage product lines cover the full operational spectrum.
Includes BA88 Electronic, DCM1, DCOF1, OFM1, OFBLT, OF1, and OFA-M1 Series. Designed to make, carry, and break currents under normal and heavy fault conditions up to 1600A, protecting main distribution feeders against overload and short circuits.
Includes OF6KA, OF10KA C65, OFAFT, OFD4Z7, OFDL, OFDP, OFDZ47, OFEU, OFKL, OFKL-NXB, OFL7, OFL8, OFNC, OFPF, and OFP Series. Compact terminal protection guardians providing precise thermal-magnetic trip curves (B, C, D) for commercial and domestic distribution panels.
Featuring the high-performance OFW1 Intelligent Universal Circuit Breaker series. High breaking capacity (Icu) up to 120kA, equipped with smart microprocessor trip units, digital communication protocols (Modbus-RTU), and flexible expandability for main plant power control.
Includes OFAP6-AC, OFDPN, OFDX, OFGX, OFID, OFL7, and OFPM Series. Dedicated earth leakage protection preventing electrocution hazards and insulation fault fires via high-sensitivity vector current summation transformers.
Includes OFC, OFKL-80A, NB1L, OFMIN, OFOM, and OFR1 Series. Innovatively integrates overload, short-circuit, and earth leakage protection into a single 1P+N or 3P+N compact modular enclosure, maximizing DIN-rail space efficiency.
Includes OFIS-125A, OFIS-BH, and OFIS-DS Series. Provides safe visual physical isolation gaps and load-breaking capabilities for maintenance isolation in photovoltaic arrays, EV charging infrastructure, and industrial switchboards.
We tailor full-lifecycle collaborative solutions for system integrators, EPC contractors, panel builders, and regional distributors worldwide.
Ideal for commercial retrofits, building automation, and standard power panels.
Tailored for major industrial plants, microgrids, solar farms, and data centers.
With active sales service offices and engineering support reaching clients across more than 100 countries, OFA secures international market access through verified adherence to global regulatory frameworks.
Proven operational success across Europe, Southeast Asia, South America, and the Middle East, including landmark participation in Belt & Road and BRICS energy infrastructure initiatives.
Every shipment is backed by comprehensive Material Declaration Statements (MDS), RoHS 3.0 test certificates, and REACH SVHC compliance disclosures for smooth customs clearance and environmental auditing.
Multilingual engineering assistance providing scheme verification, remote fault diagnosis, video-guided commissioning support, and lifetime technical guidance.
Clear, detailed answers regarding our OEM capabilities, RoHS testing protocols, product certifications, and global partnership terms.
Read why engineering leaders and system integrators trust OFA for high-stakes power automation.
"As a system integrator in Poland, we collaborated with OFA on multiple industrial automation projects. Their comprehensive range from protective relays to isolators drastically simplified our procurement. Quality is consistent batch after batch."
"We retrofitted our factory distribution boards with OFA intelligent monitoring devices and MCCBs. The setup was intuitive and integration went seamlessly. They have operated flawlessly for over a year under heavy industrial loads."
"Deploying OFA energy efficiency management devices across our managed commercial towers was a game changer. Detailed circuit metrics enabled immediate operational cost reduction. Excellent technical response team."
"Our utility-scale solar project needed durable, climate-resistant DC isolators and circuit protection. OFA met our core technical criteria at competitive pricing, backed by prompt remote engineering support."
Browse our extended lineup of high-performance Miniature Circuit Breakers, Residual Current Breakers, and Molded Case Switchgear ready for global distribution.
Contact OFA’s technical engineering and sales team today to discuss your OEM/ODM product requirements, request factory-direct quotations, or arrange customized sample testing.
OFA Electrical
