Engineered for rigorous circuit protection across 1P, 2P, 3P, and 4P configurations in the San Francisco Bay Area.
The San Francisco metropolitan area and Silicon Valley represent one of the world's most sophisticated technological and commercial ecosystems. Driven by rapid advancements in AI data center clusters, hyper-connected commercial real estate in the Financial District, and stringent California Title 24 energy standards, electrical distribution demands have reached an unprecedented level of complexity.
As a leading OF6KA Series Supplier & Manufacturer in the San Francisco market, Wenzhou OFA Electrical Technology Co., Ltd. delivers engineered low-voltage circuit protection solutions designed to withstand rapid transient overloads, continuous heavy thermal stress, and strict spatial constraints of modern DIN-rail sub-panels.
Whether servicing retrofit projects in South of Market (SoMa) tech incubators or supplying robust sub-distribution hardware for suburban Bay Area renewable microgrids, our OF6KA Miniature Circuit Breakers (MCBs) ensure zero-compromise electrical safety, high breaking capacities (6,000A / 6kA according to IEC/EN 60898-1 standards), and seamless system integration.
Delivering state-of-the-art protection against thermal overloads and electrodynamic short circuits.
Features a dual-action mechanism: a bimetallic strip for inverse time-delay overload protection and an instantaneous electromagnetic coil for instantaneous short-circuit disconnection in under 10 milliseconds.
Equipped with a 12-plate arc chute system that rapidly splits, cools, and extinguishes electric arcs, protecting internal contact points and extending operational longevity during extreme fault events.
Molded from premium VO-grade anti-combustion polycarbonate, resisting high temperatures up to 960°C glow-wire test specs, ideal for dense electrical enclosures in San Francisco commercial zones.
| Electrical & Mechanical Parameter | OF6KA Series Standard Specification | San Francisco Engineering Benchmark Compliance |
|---|---|---|
| Rated Current (In) | 1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A | Fully compatible with standard commercial panel load branch sizes |
| Pole Configuration | 1P, 2P, 3P, 4P (Single & Multi-Phase) | Supports 120/240V split-phase & 208Y/120V, 480Y/277V systems |
| Rated Breaking Capacity (Icn) | 6,000A (6kA) at 230/400V AC | Exceeds standard 4.5kA limits for sub-panel fault clearing |
| Instantaneous Tripping Curves | B Curve (3-5 In), C Curve (5-10 In), D Curve (10-14 In) | Adaptable for resistve, inductive & high-inrush motor loads |
| Electrical / Mechanical Life | 10,000 electrical cycles / 20,000 mechanical operations | Reduces long-term maintenance overhead in critical facilities |
| Protection Degree / Mounting | IP20 (Terminal IP40 enclosure) / Standard 35mm DIN Rail | Fast snap-on installation for OEM panel builders |
Wenzhou OFA Electrical Technology Co., Ltd., founded in 2013 and headquartered in Yueqing, Wenzhou—widely recognized as the Capital of Electrical Appliances in China—brings over a decade of continuous precision manufacturing to the global market.
For procurement directors, electrical wholesalers, and EPC contractors operating within the San Francisco area, partnering directly with a top-tier Chinese manufacturer like OFA presents clear strategic advantages:
Custom-engineered power protection solving real-world infrastructure challenges in Northern California.
Silicon Valley and SF data hubs require high-density power distribution units (PDUs). The OF6KA 1P and 2P models provide compact branch circuit isolation, protecting high-value server racks from transient overcurrent disruptions.
Modernization of historical and modern office towers along Market Street demands low-profile DIN-rail MCBs that fit existing distribution boards while upgrading breaking capacity from legacy 4.5kA to 6kA standards.
Integrating renewable energy storage and EV charging stations across Bay Area facilities requires reliable protection. OF6KA 3P and 4P breakers safeguard three-phase inverters and sub-metering points against grid fluctuations.
Streamlining global supply chain logistics, certification mapping, and private labeling.
Navigating the North American electrical market requires deep understanding of international harmonized standards. Our OF6KA series is built to IEC/EN 60898-1 and CE certifications, with test reports supporting compliance verification for OEM buyers integrating into broader UL-rated control assemblies.
With direct sea freight corridors from Ningbo/Shanghai ports to the Port of Oakland and San Francisco Bay terminals, OFA provides optimized FOB, CIF, or DDP logistics solutions. Standardized buffer stock programs ensure predictable replenishment cycles for regional distributors.
Driving the continuous progress of power distribution and control technology!
Founded in 2013, Wenzhou OFA Electrical Technology Co., Ltd. is one of the professional suppliers of distribution switchgear and control equipment in China. Rooted in Yueqing, Wenzhou—the Capital of Electrical Appliances in China—we own independent brands such as "OFA".
Our product matrix serves diverse global industries including power utilities, renewable energy, industrial automation, construction, and high-end equipment manufacturing. We adhere to honest and law-abiding operations, rated as tax credit grade A for seven consecutive years, earning long-term trust worldwide.
See why electrical professionals rely on OFA for their critical power distribution projects.
"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 miniature circuit breakers, simplifying procurement and integration."
"We purchased OFA's intelligent power monitoring and circuit protection devices to upgrade our plant power distribution system. They have been running stably for over a year with zero unprovoked trips."
"Deploying OFA's protection components across several commercial office buildings was a wise decision. Their technical support team is highly responsive and provided detailed wiring schematics."
Everything you need to know about technical specifications, OEM capabilities, and San Francisco regional supply.
Explore our extended series of Miniature Circuit Breakers, Residual Current Breakers, MCCBs, and Isolators.
Contact Wenzhou OFA Electrical Technology Co., Ltd. today for factory-direct price quotes, full technical data sheets, and OEM customization consulting.
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