Fully compliant with IEC/EN 60898-1 & IEC/EN 60947-2 standards for residential, commercial, and heavy manufacturing installations across Central Europe.
The Czech Republic stands as one of Central Europe's primary manufacturing hubs. With a robust heritage in automotive assembly (centered around Central Bohemia and the Liberec region), heavy machinery, metallurgy, chemical processing, and rapidly escalating semiconductor investments in Brno, the demand for ultra-reliable low-voltage power distribution equipment has reached an unprecedented high.
As Czech industrial hubs transition toward Industry 4.0, smart factories require switchgear that minimizes unplanned downtime, handles non-linear harmonic electrical loads, and prevents thermal degradation under continuous 24/7 operations. The OFGX Series Miniature Circuit Breakers (MCB) and Residual Current Circuit Breakers (RCCB) have emerged as pivotal protective devices catering to regional EPC contractors, OEM panel builders, and regional energy distributors (such as ČEZ Group, E.ON Distribuce, and PREdistribuce ecosystem partners).
A comprehensive architectural breakdown of trip mechanisms, contact metallurgy, and arc-quenching dynamics in modern circuit breakers.
The OFGX Series incorporates a 12-plate de-ionizing arc grid engineered to split, stretch, and extinguish high-voltage electric arcs within milliseconds (under 3.5ms). This drastically curtails arc energy ($I^2t$), preventing internal contact erosion and reducing fire hazards in dense industrial distribution panels.
Utilizing high-thermo-elastic bimetallic strips, OFGX breakers deliver precise time-delay trip actions during sustained overloads. Calibrated under ambient temperatures ranging from -5°C to +40°C according to EN standards, maintaining high stability without nuisance tripping.
Contact points are constructed using AgCdO/AgZnO silver alloys offering low contact resistance (<0.5mΩ), exceptional thermal conductivity, and superior resistance to contact welding during short-circuit fault currents up to 100A / 125A ratings.
| Series Model | Poles (P) | Rated Current (In) | Breaking Capacity (Icu) | Tripping Characteristic | Standards Compliance |
|---|---|---|---|---|---|
| OFGX Series MCB | 1P, 2P, 3P, 4P | 1A - 63A / 100A | 6,000A / 10,000A (6kA/10kA) | B, C, D Curves | IEC/EN 60898-1, CE |
| OFGX Residual Current (RCCB) | 2P, 4P | 25A, 40A, 63A, 80A, 100A | 10kA (with backup fuse) | Type A, AC, Type B (30mA - 300mA) | IEC/EN 61008-1 |
| OFM1 Molded Case (MCCB) | 3P, 4P | 63A - 800A | 35kA - 65kA | Thermal-Magnetic / Electronic | IEC/EN 60947-2 |
| OFBLT Solar DC Series | 2P, 4P | 16A - 800A (Up to 1500V DC) | 15kA - 20kA | DC Specific Instantaneous | IEC/EN 60947-2 (PV) |
Founded in 2013, Wenzhou OFA Electrical Technology Co., Ltd. is a specialized technology enterprise rooted in Yueqing, Wenzhou — China's ultimate Capital of Low-Voltage Electrical Appliances. Operating proprietary brands like "OFA", our production facilities integrate smart component stamping, automated coil winding, robotic assembly, and digital calibration systems.
We have been rated as a Tax Credit Grade A Enterprise for 7 consecutive years, earning long-term trust across global industrial supply networks including Western & Central Europe, South America, and Southeast Asia. Our strict 100% full-inspection SOP guarantees zero out-of-factory critical defects.
From automated automotive assembly lines to solar farm infrastructure, OFGX units offer robust protection performance.
Deployed in control cabinets for automated stamping and robotic welding plants across Mladá Boleslav and Kvasiny. High resistance to vibration and magnetic disturbance keeps conveyor lines running uninterrupted.
Pairing OFBLT DC MCCBs with OFGX AC switchgear in rooftop solar systems across South Moravian vineyards and industrial logistics parks in Ostrava to handle high ambient heat and bi-directional currents.
Serving tech infrastructures in Prague and Brno where power quality and ultra-fast fault isolation prevent expensive server outages and safeguard sensitive computing equipment.
A simple 4-step engineering and procurement journey from initial schematic consultation to rapid factory shipment.
Our engineering team reviews your single-line diagrams (SLD), required breaking capacities (Icu/Ics), ambient operating conditions, and certifications (CE, EN 60898-1) to confirm optimal product selection.
We configure custom trip parameters, laser markings, brand labeling, and specialized terminal clamps. Type-test samples are dispatched for local Czech laboratory verification.
Mass production takes place on automated lines featuring 100% instant calibration checks for thermal tripping curves and dielectric strength withstand tests.
Export-ready packaging with custom barcodes shipped directly to Hamburg/Gdańsk ports or directly via rail/air cargo to your central warehouse in Prague, Brno, or Pilsen.
Explore our complete lineup of MCBs, RCCBs, RCBOs, MCCBs, and Isolator Switches available for OEM volume ordering in Czech Republic.
Heavy-duty MCCB and Isolator options engineered for high-amp distribution networks.
State-of-the-art testing stations for thermal calibration, short-circuit withstand, mechanical life endurance, and automated packaging.
See why global industrial integration leaders rely on OFA for consistent low-voltage safety and rapid shipment.
"As a system integrator in Poland bordering the Czech industrial belt, our company has collaborated with OFA on several industrial automation projects. Their product range is comprehensive, covering protective relays to DC MCCBs, simplifying our procurement. Product quality is consistently stable."
"We purchased OFA's intelligent power monitoring and circuit protection devices to upgrade the power distribution system in our workshop. The setup went smoothly. They have been running stably for over a year with zero false trips."
"Our commercial PV project required reliable DC protection equipment. OFA's OFBLT series met our technical requirements perfectly at competitive direct-factory prices. Engineering support via video call was exceptionally responsive."
Everything you need to know about sourcing OFGX breakers, EN standard compliance, custom labeling, and Czech regional logistics.
Yes. All OFGX Series Miniature Circuit Breakers (MCBs) and Residual Current Circuit Breakers (RCCBs) comply strictly with standard ČSN EN 60898-1 for household/similar installations and ČSN EN 60947-2 for low-voltage industrial equipment. They carry valid CE markings and undergo RoHS/REACH material safety compliance screening.
Absolutely. We provide full OEM customization including laser etching of your proprietary Czech brand logo, custom current rating curve markings (B, C, or D curves), customized pole coloration, individual box packaging, and multi-language instruction manuals.
Standard production lead time for full container or LCL orders is 15-20 days post sample approval. Sea freight from Ningbo/Shanghai to Hamburg port with rail feeder service to Prague takes approximately 28-35 days. Urgent technical samples can be dispatched via DHL/FedEx air freight within 5-7 working days.
We stand firmly behind our engineering quality by offering a standard 18 to 24-month manufacturer warranty. In the rare event of a component defect, our technical team conducts root-cause analysis and dispatches immediate replacement units free of charge.
Get direct factory wholesale pricing, official technical datasheets, and free engineering samples for your next project. Speak directly with Wenzhou OFA's senior electrical engineers.
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