Precision-engineered 1P to 4P thermal-magnetic circuit protection components customized for London’s high-reliability distribution boards.
The OFL8 Series Miniature Circuit Breaker (MCB) represents the pinnacle of modern low-voltage overcurrent protection technology. Designed to withstand the rigorous operational demands of Greater London’s commercial, industrial, and infrastructure power systems, the OFL8 series combines precise thermal-magnetic tripping dynamics with high short-circuit interrupting capabilities up to 10kA under BS EN 60898-1 and IEC/EN 60947-2 standards.
Whether integrated into dense commercial sub-distribution units in Canary Wharf, heavy-duty logistics facilities along the M25 corridor, or green EV charging networks across Inner London, OFL8 breakers deliver consistent arc-quenching performance, low watt-loss metrics, and long-term mechanical resilience.
As the United Kingdom accelerates toward Net-Zero carbon goals, Greater London’s electrical grid is experiencing unprecedented stress from rapid electrification, commercial retrofitting, and data infrastructure expansion.
Central London and Canary Wharf commercial real estates are replacing legacy switchgear with high-density, low-wattage MCBs like the OFL8 series to meet stringent BS 7671 (18th Edition Amendment 2) fire safety and power monitoring norms.
Hyperscale and edge data centers across the Thames Gateway demand zero-downtime overcurrent components. OFL8 MCBs feature silver-alloy contact points ensuring ultra-low contact resistance and thermal stability under continuous peak load conditions.
With London’s ULEZ expansions, thousands of AC/DC charging stations are deployed annually. OFL8 2P and 4P breakers provide robust, high-duty-cycle protection for commercial EV distribution boards.
Manufactured by Wenzhou OFA Electrical Technology Co., Ltd. in Yueqing, Wenzhou—the world-renowned capital of electrical equipment—our factory integrates automated assembly lines, digital optical sorting, and robotic magnetic-trip testing stations. This Industry 4.0 footprint delivers uncompromised quality control at direct OEM factory pricing.
For UK electrical distributors, OEM brand owners, and panel builders in London, OFA provides agile supply chain solutions, rapid turnaround times for custom-branded enclosures, and strict compliance with EU/UKCA directives.
Rated Tax Credit Grade A for 7 consecutive years, ensuring corporate integrity and long-term supply stability.
Comprehensive type testing for temperature rise, dielectric strength, and mechanical trip endurance on every batch.
An in-depth look at the internal contact physics, arc deionization technology, and thermal-magnetic trip calibration that set the OFL8 series apart.
Equipped with a 12-plate arc chute system, the OFL8 rapidly elongates, cools, and extinguishes high-energy electrical arcs within 3 to 5 milliseconds during short-circuit events, preventing back-arc damage to the distribution panel.
High-precision bimetallic elements respond reliably to continuous inverse-time overload conditions. Every OFL8 unit undergoes thermal tripping calibration at 30°C ambient baseline per BS EN 60898-1 requirements.
Constructed with high-percentage AgSnO2 (Silver Tin Oxide) contact tips, offering superior anti-welding properties, low contact resistance, and exceptional resistance to erosion under high fault current interruption.
| Parameter / Model | OFL8 1P / 2P | OFL8 3P / 4P | DC Sub-Variants |
|---|---|---|---|
| Standards Compliance | BS EN 60898-1, IEC 60898-1 | BS EN 60898-1, IEC 60947-2 | IEC 60947-2 (DC) |
| Poles Configuration | 1P, 1P+N, 2P | 3P, 3P+N, 4P | 1P (250V), 2P (500V) DC |
| Rated Current (In) | 1A to 63A | 1A to 63A | 6A to 125A |
| Short Circuit Capacity (Icn) | 6,000A / 10,000A | 6,000A / 10,000A | 10,000A |
| Mechanical Endurance | 20,000 Cycles | 20,000 Cycles | 15,000 Cycles |
| Terminal Capacity | 1 to 25mm² Rigid Wire | 1 to 25mm² Rigid Wire | 1 to 35mm² Rigid Wire |
Explore OFA’s full catalog of MCBs, MCCBs, RCCBs, and DC PV solar protection components engineered for industrial, commercial, and residential projects.
Tailored engineering configurations designed for the UK’s distinct electrical standards and installation environments.
High-density office towers demand compact DIN-rail distribution boards. The OFL8’s 18mm per pole modular design allows maximum circuit density per enclosure while retaining 10kA breaking capacity under heavy switching loads.
Heavy industrial air-cargo handling hubs around Heathrow Airport require protection against high inrush currents from conveyor motors and automated sorting drives without nuisance tripping.
Strict compliance with BS 7671 metal consumer unit requirements. OFL8 1P+N and 2P MCBs deliver thermal protection for domestic lighting, HVAC, and household appliance sub-circuits.
Addressing key technical, regulatory, and supply chain queries from UK electrical engineers, panel builders, and wholesalers.
Contact our engineering and sales consultation team today for factory-direct price lists, technical datasheets, and sample evaluation packs for your upcoming London projects.
OFA Electrical
