Engineered for high-breaking capacities, optimal thermal-magnetic performance, and climate-hardened durability in Hanoi's power distribution environments.
OFP Series MCB 4.5kA
Compact commercial & residential electrical enclosure protection with high-precision bimetallic tripping.
OFP Series MCB 6kA
Industrial-grade breaking capacity built for heavy motor loads, HVAC systems, and factory distribution boards.
OFA-M1 Series 125A MCCB
Molded Case Circuit Breaker providing heavy-duty mains protection for commercial switchboards.
OFL7 Series 4P MCB
Four-pole complete phase isolation circuit breaker for multi-phase commercial & solar arrays.
As the economic engine of Northern Vietnam, Hanoi is witnessing unprecedented expansion in industrial infrastructure, high-density residential developments, and high-tech manufacturing corridors across zones such as Thang Long Industrial Park, Hoa Lac Hi-Tech Park, and VSIP Bac Ninh perimeter. Modern electrical infrastructure in these hubs requires robust, highly reliable switchgear capable of mitigating severe thermal stress, humidity-induced galvanic corrosion, and supply-grid voltage fluctuations.
The OFP Series Miniature Circuit Breakers (MCBs), manufactured by Wenzhou OFA Electrical Technology Co., Ltd., represent a milestone in low-voltage protection technology. Built with high-grade silver-alloy contacts, flame-retardant thermoplastics (UL94-V0 rated), and fast arc-extinguishing chute channels, the OFP Series delivers robust short-circuit breaking capabilities (4.5kA, 6kA, and up to 10kA under IEC/EN 60898-1 standards).
Hanoi experiences subtropical monsoonal conditions with ambient temperatures frequently exceeding 38°C with relative humidity over 85%. Standard off-the-shelf breakers experience thermal drift and nuisance tripping under such conditions. OFA's OFP Series features calibrated bimetallic strips adjusted for elevated ambient baselines, ensuring continuous rated current stability without premature tripping.
| Parameter | OFP Series Specification |
|---|---|
| Rated Current (In) | 1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Poles Configuration | 1P, 2P, 3P, 4P, 1P+N, 3P+N |
| Short-Circuit Capacity (Icn) | 4,500A (4.5kA) & 6,000A (6kA) at 230V/400V AC |
| Tripping Characteristics | B Curve (3-5 In), C Curve (5-10 In), D Curve (10-14 In) |
| Insulation Voltage (Ui) | 500V AC |
| Impulse Withstand (Uimp) | 4kV (1.2/50 μs arc insulation resilience) |
| Enclosure Protection Class | IP20 (Terminals), IP40 (Installed in distribution box) |
| International Compliance | IEC/EN 60898-1, TCVN 6434-1, CE, RoHS compliant |
Analyzing the operational requirements of EVN grid compatibility, high-volume project procurement, and land-route logistics speed from Wenzhou to Hanoi.
Vietnam's national utility network (EVN) operates under standard 220V/380V frequencies, but industrial zones around Hanoi encounter high transient voltage spikes and load fluctuations during peak summer months. OFP Series circuit breakers comply fully with TCVN 6434-1 standards and IEC 60898-1, offering fast magnetic tripping within 10 milliseconds to prevent transformer and panel damage.
Located in Yueqing, Wenzhou—the Capital of Electrical Appliances in China—OFA leverages direct highway and maritime logistics corridors. Shipments destined for Hanoi travel via overland routes through Friendship Pass (Hữu Nghị Border Gate, Lạng Sơn) in as few as 3 to 5 days, or via sea freight through Haiphong Port, guaranteeing project completion deadlines for EPC contractors.
Procuring directly from OFA eliminates intermediary distributor markups while maintaining rigid European compliance (CE). Hanoi switchboard builders and panel assemblers benefit from custom laser branding, custom terminal connections, tailored tripping curve configurations, and bulk packaging options.
The OFP Series is engineered from the ground up to prevent electrical fires, short-circuit damage, and thermal overloads. Inside every OFP unit is a precision-calibrated thermal-magnetic trip mechanism:
From high-tech cleanrooms to heavy commercial towers, OFA electrical components deliver unwavering protection.
Thang Long IP, Quang Minh IP, Dong Anh Hubs
Continuous automated assembly lines require reliable C-Curve and D-Curve OFP series breakers to handle motor inrush currents without unwanted trips. Integrated with main MCCBs for selective fault discrimination.
Cau Giay District, Nam Tu Liem Financial Center
High-density office towers and mixed-use commercial centers rely on 4.5kA and 6kA OFP MCBs inside floor distribution boards for lighting circuits, HVAC handlers, and server room sub-panels.
Rooftop Solar Projects in Hoa Lac & Perimeter Provinces
Coupled with OFA Isolance Switches (IS) and RCBO devices, OFP breakers safe-guard solar inverter combiner boxes against DC/AC reverse overcurrents and earth leakage faults.
Founded in 2013, Wenzhou OFA Electrical Technology Co., Ltd. is rooted in Yueqing, Wenzhou—the world-renowned epicenter of China’s electrical manufacturing industry. Operating under independent brands such as "OFA", our production facilities integrate digital assembly lines, full-process mechanical testing, and automated optical inspection stations.
Upholding strict law-abiding operations, OFA has been awarded Tax Credit Grade A for seven consecutive years. Our factory complies with ISO9001 Quality Management Systems, ensuring every batch of OFP circuit breakers shipped to Hanoi and worldwide complies with strict zero-defect quality control protocols.
Explore our complete range of low-voltage switchgear engineered for Hanoi project procurement.
Primary protection designed to make, carry, and break currents under normal and abnormal fault conditions in industrial distributions.
Innovative residual current devices combining high-sensitivity earth leakage, overload, and short-circuit protection.
Earth leakage protection for moist environments in Hanoi commercial facilities.
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Integrated circuit isolation for maintenance disconnect safety switches.
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High reliability terminal miniature breaker for automated control panels.
Explore OFAFT →Select from our complete range of specialized Molded Case and Miniature Circuit Breakers tailored for Vietnam procurement.
OEM DCM1-125L/1P MCCB
Single-pole molded case circuit breaker designed for space-constrained power feeds.
OFBLT 2P 320A MCCB
High amperage two-pole breaker built for industrial main switchboards and heavy machinery.
BA88-630E MCCB
630A electronic trip MCCB delivering high interrupt rating and precise trip curve settings.
OFM1/125A MCCB
Heavy-duty 125A MCCB for sub-station switchboards and factory power branches.
OEM OFKL 2P MCB
Two-pole compact MCB designed for dual-line isolation and single-phase motor circuits.
OEM OFDL 3P MCB
Three-pole DIN-rail mounted breaker engineered for 3-phase HVAC and pump motors.
OEM OFEU 2P MCB
European-spec modular circuit breaker delivering reliable short-circuit protection.
OFL7 Series 1P MCB
Single-pole residential and light commercial circuit protection unit.
Real-world feedback from engineering directors, plant maintenance supervisors, and system integrators.
"Deploying OFA's OFP Series MCBs in our manufacturing facility near Hanoi was a seamless experience. The thermal stability during hot summer months eliminated the nuisance tripping we previously experienced with lower-tier suppliers."
"As a system integrator executing EPC contracts in Northern Vietnam, we value OFA’s fast delivery times from Yueqing via Lạng Sơn. Their technical documentation is exceptionally clear and compliant with IEC/TCVN standards."
"OFA provided customized OEM laser branding and specific C-curve calibration for our commercial distribution panels in Nam Tu Liem. Their tax credit Grade A background gives us complete supply chain confidence."
Got technical or logistical questions? Here are clear, authoritative engineering answers.
Partner directly with Wenzhou OFA Electrical Technology Co., Ltd. for factory-direct pricing, fast cross-border logistics, and IEC-certified reliability.
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