High-performance RCBOs and MCBs engineered to meet Switzerland’s rigorous power distribution safety codes and environmental criteria.
An authoritative technical analysis for Swiss panel builders, EPC contractors, and electrical wholesalers evaluating international OEM/ODM supply chains.
Switzerland’s electrical distribution infrastructure is governed by strict safety regulations overseen by the Federal Inspectorate for Heavy Current Installations (ESTI) and defined within the Ordinance on Low-Voltage Electrical Products (NEV / SR 734.26). In a TN-S / TN-C-S grounding architecture operating at 230V/400V 50Hz, circuit protection demands absolute precision.
While traditional distribution boards utilized separate Miniature Circuit Breakers (MCBs) combined with Residual Current Devices (RCDs/RCCBs), modern Swiss installation standards increasingly dictate the deployment of integrated Residual Current Operated Circuit Breakers with Overcurrent Protection (RCBOs). RCBOs streamline enclosure density, eliminate nuisance tripping across independent sub-circuits, and protect human life against direct or indirect contact shock down to 30mA tripping thresholds.
As Switzerland accelerates its "Energy Strategy 2050", the rapid integration of heat pumps, Alpine solar photovoltaic (PV) arrays, electric vehicle (EV) charging stations under SIA 2060 guidelines, and variable frequency drives (VFDs) in commercial HVAC networks has shifted component requirements.
Standard Type AC leakage protection is no longer sufficient for complex non-sinusoidal AC fault currents or smooth DC residual leakage. Qualified RCBO suppliers serving Swiss engineers must deliver high-grade Type A (pulsating DC fault protection), Type F (frequency-adjusted protection for single-phase drives), and Type B (pure DC fault detection) devices built to withstand high short-circuit values up to 10kA (EN 61009-1).
Bridging China's advanced low-voltage electrical manufacturing ecosystem with Switzerland’s stringent quality benchmarks.
Situated in Yueqing, Wenzhou—the Capital of Electrical Appliances in China—Wenzhou OFA Electrical Technology Co., Ltd. leverages an end-to-end component supply chain. From silver-alloy contact sintering to flame-retardant V-0 PC housing molding, localized manufacturing scale significantly lowers unit production costs without sacrificing raw material specifications.
OFA enforces rigorous quality control SOPs. Every single RCBO leaving our assembly line undergoes automated thermal-magnetic trip curve testing, high-potential voltage dielectric verification, and instant residual current trip time verification (<0.04 seconds) using high-precision digital test stations to guarantee zero-defect export compliance.
Operated with transparency and integrity since 2013, OFA has earned tax credit Grade A status for seven consecutive years. Recognized globally by EPC integrators and wholesalers, we maintain custom OEM/ODM delivery schedules, custom laser branding, and tailored Swiss packaging configurations.
From sub-zero Alpine telecommunication towers to high-density Zurich data hubs, our switchgear delivers unyielding thermal stability and electrical performance.
Unlocking tailored protective switchgear configurations for mission-critical industrial, residential, and commercial operations.
High-altitude solar installations on Swiss mountain slopes experience extreme temperature fluctuations and UV exposure. OFA's Type A and Type B RCBO devices offer anti-aging polycarbonate housings and ambient-compensated bi-metallic release mechanisms. They prevent false tripping from capacitive grid harmonics while ensuring fast disconnection under genuine DC residual faults.
Under Swiss SIA 2060 guidelines, public and private EV charging infrastructure requires dedicated earth fault protection against smooth DC fault currents exceeding 6mA. Deploying OFA 1P+N compact RCBOs eliminates the need for bulky external RCCB modules, allowing panel builders to construct compact, multi-charging distribution boards with individual line isolation.
Switzerland’s leading manufacturing sectors—pharmaceuticals in Basel and precision watchmaking in the Jura Arc—depend on zero-downtime automated lines. OFA RCBOs integrate high surge current withstand capability (8/20µs surge immunity), mitigating nuisance trips caused by switching transients or lightning strikes while safeguarding sensitive cleanroom PLC controllers.
From luxury hotels in St. Moritz to financial offices in Geneva, electrical safety standards mandate 30mA protection for all socket outlet circuits. OFA’s slimline DIN-rail RCBO series saves up to 50% cabinet space compared to traditional legacy switchgear, simplifying retrofits in historic Swiss architecture.
Review our comprehensive specification grid to match project requirements with optimal circuit protection parameters.
| Specification Parameter | Standard Residential (Swiss Homes) | Commercial EV & Heat Pump | Industrial Automation & BESS |
|---|---|---|---|
| Rated Current (In) | 6A, 10A, 16A, 20A, 32A | 16A, 32A, 40A | 16A, 32A, 63A, 80A |
| Pole Configuration | 1P+N (Compact 1M width) | 1P+N / 3P+N | 2P / 4P Full Switched Neutral |
| Residual Current Type | Type AC / Type A | Type A / Type F / Type B | Type B (Pure DC Fault Protection) |
| Tripping Sensitivity (IΔn) | 30 mA (Life Safety) | 30 mA (EV/HVAC) | 30mA, 100mA, 300mA (Fire Protection) |
| Breaking Capacity (Icn) | 6,000A (6kA) | 10,000A (10kA) | 10,000A - 15,000A (10-15kA) |
| Tripping Curve | B Curve (Fast / Resistive) | C Curve (Inductive / Motors) | C Curve / D Curve (High Inrush) |
| Standard Compliance | IEC/EN 61009-1, CE, ESTI | IEC/EN 61009-1, IEC 62423 | IEC/EN 61009-1, ISO9001 |
Founded in 2013, Wenzhou OFA Electrical Technology Co., Ltd. is rooted in Yueqing, Wenzhou—the Capital of Electrical Appliances in China. We operate as a premier technology-driven manufacturer specialized in distribution switchgear, control equipment, and low-voltage electrical protection accessories.
Through dedicated independent R&D, continuous pragmatic innovation, and lean manufacturing processes, OFA provides global partners with high-stability components including MCBs, MCCBs, RCCBs, ACBs, Isolator Switches (IS), and RCBOs. Certified to ISO9001 quality management standards, our factory ensures full-process testing covering mechanical endurance, thermal rise, and insulation withstand performance.
Explore our full line of miniature circuit breakers, molded case circuit breakers, and residual current protection equipment for Swiss industrial applications.
Detailed answers covering compliance, engineering specifications, shipping logistics, and OEM integration.
Yes. OFA RCBOs are engineered and tested in accordance with international IEC/EN 61009-1 standards and possess CE certification. They fulfill all core safety mandates outlined under the Swiss Ordinance on Low-Voltage Electrical Products (NEV / SR 734.26). We provide complete type test reports from accredited third-party laboratories to assist Swiss importers with ESTI registration and compliance declarations.
An RCBO combines residual current earth-fault protection and thermal-magnetic overcurrent protection within a single module. In Swiss panel building, using compact RCBOs (such as OFA 1P+N modules) saves up to 50% DIN-rail space. Furthermore, if an earth fault occurs, only the affected sub-circuit trips, keeping remaining facility circuits powered and preventing site-wide operational outages.
For electric vehicle charging stations, Swiss SIA 2060 guidelines require protection against smooth DC fault currents. OFA recommends utilizing Type A RCBOs paired with internal 6mA DC detection modules, or selecting our specialized Type B RCBO series. Type B devices detect AC, pulsating DC, and high-frequency smooth DC leakage currents, offering comprehensive safety for modern EV wallboxes.
OFA RCBOs utilize premium flame-retardant thermoplastics and high-grade silver-nickel contact points engineered for operating temperatures ranging from -25°C to +60°C. They undergo low-temperature mechanical trip validation, ensuring prompt magnetic release during severe winter conditions in high-altitude mountain sub-stations and alpine solar arrays.
We offer end-to-end OEM and ODM customization services for Swiss panel builders and equipment brands. This includes custom laser-etched front face branding, tailored tripping curves (B, C, or D), custom terminal connection screws (tunnel or busbar design), custom voltage ratings (230V/400V), and retail packaging tailored to Swiss retail distribution requirements.
Standard production lead times for customized OEM orders range from 15 to 25 days. We support flexible shipping terms including FOB Ningbo/Shanghai, CIF Hamburg/Rotterdam, or DDP directly to Swiss warehouses (Zurich, Basel, Bern, Geneva). We provide all EUR.1 preferential origin documentation and commercial paperwork required for seamless Swiss customs clearance.
Contact Wenzhou OFA Electrical Technology Co., Ltd. today to request sample units, complete IEC test reports, or a competitive factory-direct quote for the Switzerland market.
OFA Electrical
