Full-range DIN-rail mounted MCBs precision-manufactured for high breaking capacity, rapid thermal-magnetic tripping response, and total compliance with Portuguese grid standards.
Portugal is undergoing a rapid clean energy shift under the Plano Nacional de Energia e Clima (PNEC 2030). With soaring decentralized solar PV installations across districts such as Faro, Beja, and Évora, combined with extensive urban electrification projects in Lisbon and Porto, the national grid managed by E-Redes demands robust circuit protection components capable of handling thermal stress, intermittent harmonic fluctuations, and strict short-circuit thresholds.
The OFNC Series Miniature Circuit Breakers (MCBs) are tailored specifically to fulfill Portuguese commercial and residential distribution board requirements (230V/400V AC at 50Hz). Designed with advanced silver-alloy contacts and reinforced arc-quenching chambers, the OFNC Series prevents catastrophic electrical fires, unexpected tripping under ambient heat, and equipment damage caused by rapid grid fluctuations.
Explore how our Yueqing manufacturing facility leverages state-of-the-art metallurgy, flame-retardant polymers, and precision calibration to deliver world-class circuit protection.
Available in B, C, and D curves to match diverse load characteristics across Portuguese projects. Type B (3-5In) for resistive lighting; Type C (5-10In) for standard commercial circuits; Type D (10-14In) for high inrush inductive motor loads.
Features a 12-plate de-ion arc chute mechanism that extinguishes electrical arcs within milliseconds. Reduces contact erosion and thermal stress on plastic housings during severe short-circuit faults.
Molded from premium, self-extinguishing polyamide 66 resin. Resists tracking, high ambient operating temperatures, and mechanical impacts, guaranteeing long-term durability in enclosed consumer units.
| Technical Parameter | Standard Household Specification | OFNC Series Factory Standard | Engineering Advantage for Portugal |
|---|---|---|---|
| Rated Current (In) | 1A to 63A | 1A, 2A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A | Precise protection matching for both residential & OEM machinery. |
| Poles Configuration | 1P, 2P, 3P | 1P, 2P, 3P, 4P, 1P+N, 3P+N | Supports both single-phase (230V) & three-phase (400V) Portuguese networks. |
| Ultimate Breaking Capacity (Icu) | 4.5kA / 6kA | 6,000A / 10,000A (IEC/EN 60898-1) | Prevents catastrophic contact welding during peak fault currents. |
| Rated Impulse Withstand Voltage (Uimp) | 4 kV | 6 kV (1.2/50 µs) | High resistance against lightning grid surges common in rural Portugal. |
| IP Grade & Mounting | IP20 / 35mm DIN Rail | IP20 Terminals, Dual-Lock DIN Rail Clip | Rapid, secure mounting on standard EN 50022 top-hat rails. |
| Operating Ambient Temp | -5°C to +40°C | -35°C to +70°C (30°C Calibration Base) | Reliable operation in hot attic enclosures and outdoor solar combiner boxes. |
From urban restoration in Porto to solar power plants in Alentejo, OFNC Series MCBs deliver unmatched safety and operational reliability.
Used in luxury apartments, residential developments, and renovated heritage buildings across Lisbon, Porto, and Coimbra. Protects branch lighting, socket outlets, and household appliances against thermal overloads and short-circuit hazards.
Integrated into AC combiner boxes and inverter outputs for solar farms and agricultural solar pumps in Alentejo and Algarve. Ensures continuous power export while shielding sensitive power electronics against grid disturbance.
Deployed by machine builders and panel fabricators in the industrial hubs of Aveiro, Braga, and Setúbal. Protects PLC racks, variable speed drives, motor starter circuits, and industrial cooling networks.
Founded in 2013 in Yueqing, Wenzhou—the globally recognized Capital of Electrical Appliances in China—Wenzhou OFA Electrical Technology Co., Ltd. combines deep R&D with vertical manufacturing integration. By controlling every stage of production, from silver contact stamping and bimetal thermal element calibration to automated robotic assembly, we offer Portuguese partners unrivaled cost-to-performance ratios.
As global power distribution transitions toward IoT integration and microgrid autonomy, OFA Electrical is continuously driving technological innovation.
Integrating micro-RS485 and Modbus/Zigbee wireless telemetry into DIN-rail circuit breakers for real-time current monitoring, remote trip diagnostics, and predictive maintenance in smart Portuguese facilities.
Eliminating hazardous flame retardants and heavy metals to exceed RoHS and REACH standards. All plastics are 100% recyclable, aligning with EU circular economy directives.
Expanding high-voltage DC protection solutions up to 1500V DC to safeguard energy storage systems (BESS) and ultra-fast DC charging hubs across Portugal's public infrastructure network.
Navigating European safety directives requires trusted manufacturing verification. OFA Electrical ensures all products shipped to Portugal strictly meet EU low-voltage directives (LVD 2014/35/EU) and Electromagnetic Compatibility standards (EMC 2014/30/EU).
We provide full engineering dossiers including type-test reports, CAD 2D/3D BIM models, step files for panel designers, and clear English/Portuguese product datasheets to streamline project approval with local inspection authorities.
Integrate OFNC MCBs with our full range of high-performance residual current breakers, MCCBs, and isolators for complete system protection.
Direct answers regarding compliance, OEM ordering, technical specifications, and shipping to Portugal.
Looking for competitive factory pricing, custom OEM solutions, or wholesale distribution rights for the OFNC Series in Portugal? Contact our engineering sales team today for prompt technical quotes and sample dispatch.
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