Precision-engineered 1P to 4P Miniature Circuit Breakers optimized for 230V/400V 50Hz electrical distribution networks across Marmara industrial zones.
As Turkey’s primary economic powerhouse bridging Europe and Asia, Istanbul's industrial sectors—ranging from automotive manufacturing in Gebze and Tuzla to heavy textile processing, logistics hubs, and massive commercial developments in Maslak and Levent—require exceptionally stable electrical distribution equipment.
The Marmara industrial corridor experiences significant ambient temperature fluctuations, high humidity near coastal operations, and demanding duty cycles. Electrical installations must adhere strictly to Turkish Standards Institution (TSE) guidelines, aligned with IEC 60898-1 and IEC 60947-2 standards. The OFKL Series Miniature Circuit Breakers (MCBs) are specifically calibrated to deliver high breaking capacity (6kA to 10kA), excellent thermal dissipation, and absolute overcurrent reliability, preventing costly operational downtime in industrial automation lines.
Globally, low-voltage power distribution is undergoing a seismic shift toward higher short-circuit interrupting capabilities, modular DIN-rail integration, and enhanced fire-retardant material compliance. Commercial buildings and smart factories are integrating distributed solar photovoltaic (PV) generation and EV charging stations, creating complex harmonics and bidirectional load profiles.
Wenzhou OFA Electrical Technology Co., Ltd. addresses these global demands by combining robust mechanical trip mechanisms with advanced arc-extinguishing chute design. The OFKL Series provides global procurement officers and system integrators with certified, cost-efficient, and long-lifespan circuit breakers that meet rigorous environmental directives including RoHS and REACH.
Founded in 2013 in Yueqing, Wenzhou—the Capital of Electrical Appliances in China—OFA has established itself as an authoritative supplier of distribution switchgear, MCBs, MCCBs, RCBOs, and control equipment. Rated as a Tax Credit Grade A Enterprise for seven consecutive years, OFA builds time-tested partnerships globally.
Our technical R&D team delves deep into material science, contact welding technology, and magnetic trip system design. Full-process type testing verifies mechanical life, thermal rise under maximum load, and dielectric strength.
Equipped with automated assembly lines, digital inspection stations, and continuous calibration rigs, OFA maintains an ultra-low factory defect rate while keeping production costs optimized for high-volume orders.
Products undergo rigorous evaluation, obtaining ISO9001 quality management certification alongside CE, IEC, and compliance parameters required for seamless import into Turkey and the wider Middle East/European regions.
To assist panel builders, system integrators, and electrical procurement directors in Istanbul, the following technical matrix details the engineering benchmarks of the OFKL Series compared to standard market specifications.
| Technical Parameter | OFKL Standard Series | OFKL High-Capacity (10KA) | Industry Standard Average |
|---|---|---|---|
| Rated Current (In) | 1A, 2A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A | 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A | 6A to 63A |
| Number of Poles | 1P, 2P, 3P, 4P, 1P+N, 3P+N | 1P, 2P, 3P, 4P | 1P, 2P, 3P, 4P |
| Rated Breaking Capacity (Icn/Icu) | 6,000A (6kA) according to IEC 60898-1 | 10,000A (10kA) according to IEC 60947-2 | 4,500A - 6,000A |
| Tripping Characteristics | B Curve (3-5In), C Curve (5-10In), D Curve (10-14In) | C Curve, D Curve | C Curve only |
| Housing Flame Retardancy | UL94-V0 Grade Thermosetting / PA66 Nylon | UL94-V0 High-Impact Polyamide | Standard ABS or V1 Grade |
| Arc Extinguishing System | 12-Plate De-ion Grid Chute with Fast Blowout | 13-Plate Reinforced Arc Chute | 9-10 Plate Chute |
| Mechanical / Electrical Endurance | 20,000 Operations / 10,000 Operations | 20,000 Operations / 10,000 Operations | 10,000 / 4,000 Operations |
| Terminal Connection Capacity | Tunnel terminal for cables up to 25mm² | Tunnel terminal for cables up to 35mm² | Up to 16mm² - 25mm² |
| Ambient Operating Temp | -35°C to +70°C (Thermal derating tables available) | -35°C to +70°C | -5°C to +40°C |
The versatile engineering of OFKL Series circuit breakers renders them optimal for demanding environments throughout the Marmara regional grid and specialized installations across Turkey.
Heavy industrial environments require 3P and 4P OFKL MCBs capable of handling inductive motor starting currents and harsh ambient vibration. The D-Curve magnetic tripping profile prevents nuisance tripping while guaranteeing rapid disconnection under severe short-circuit faults.
High-density urban towers in Istanbul require space-efficient, reliable floor distribution boards. OFKL 1P+N and 2P MCBs alongside OFOM RCBO series ensure maximum human life safety, preventing earth leakage risks and electrical fires in heavily populated commercial zones.
Turkey’s aggressive solar power targets demand resilient DC and AC protection solutions. OFKL MCBs, combined with specialized OF1-125/PV DC breakers, provide sub-distribution defense in inverter stations and solar combiner boxes subjected to outdoor temperature swings.
Situated in Yueqing, Wenzhou, OFA directly leverages China's most comprehensive electrical manufacturing ecosystem. Raw material sourcing—including high-purity silver contact points, high-grade copper busbars, and engineered flame-retardant polymers—is streamlined to eliminate supply chain bottlenecks.
This industrial concentration enables OFA to offer high breaking capacity miniature circuit breakers at costs up to 30-40% lower than Western legacy brands, without compromising on component quality or testing rigor.
OFA provides complete OEM customization tailored for Turkish distributors and panel builders. Services include custom laser marking, branded front-face printing, tailored tripping curve adjustments, and private label packaging designs.
With large-scale inventory reserves of standardized components, urgent volume orders can be assembled, full-batch routine tested, and prepared for shipping to the Port of Ambarlı (Istanbul) or Gebze ports within optimized lead times.
Explore our full line of MCB, RCBO, RCCB, ACB, and Isolator solutions engineered for distribution stability.
Get quick, authoritative engineering insights into OFA’s OFKL series miniature circuit breakers, standards compliance, custom manufacturing, and international shipment logistics.
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OFA Electrical
