Fibox Arca T: a revolution in reliability in the world of polycarbonate enclosures

Contents:

• Technical specifications and protection standards
• Transparent door – a window into efficiency
• Polycarbonate vs stainless steel
• Design features and ease of use
• Conclusion

At the beginning of 2026, Fibox introduced its latest development to the global market – the Fibox Arca T enclosure series. This is an evolutionary advancement of the ARCA range, which has already proven itself, with the key innovation being the largest integrated transparent door on the market.

Technical specifications and protection standards

The foundation of any electrical enclosure is its ability to protect internal components from an aggressive external environment. The Fibox Arca T series is made of high-strength polycarbonate, which offers exceptional performance characteristics.

Key technical parameters of Arca T series enclosures:

• dimensions: the range offers a wide selection of sizes for projects of any scale. The most compact models start at 300 x 200 x 150 mm, and the largest reach 600 x 400 x 210 mm;
• degree of protection ( IP ): the enclosures are certified to the IP standard. This means the enclosure is completely dust-tight and can withstand powerful water jets or sea waves. The cabinets are equipped with a seamless polyurethane gasket, ensuring reliable sealing for many years;
• impact resistance ( IK ): standard solid ARCA enclosures have the highest IK rating. Given the presence of a fully transparent door, the Arca T rating is IK 09, which is an excellent result for enclosures with viewing windows, providing reliable protection against strong mechanical impacts and accidental damage;
• temperature range: the material is designed for continuous operation from -40 °C to +80 °C;
• fire safety: the UL 94 5 VA rating confirms the highest resistance to ignition. In addition, the material is halogen-free;
• electrical insulation: the enclosures are fully electrically insulated, significantly improving personnel safety when working with the equipment.

Transparent door – a window into efficiency

The main distinguishing feature of the ARCA T series is the innovative fully transparent door, covering the maximum possible area of the front. In today’s environment of automation, IoT (Internet of Things) deployment, and strict safety protocols, monitoring equipment status must be continuous and safe.

Traditional solutions required installing small flush-mounted viewing windows that limit the viewing angle, or fully opening the door for visual inspection of circuit breakers and PLCs. Opening an enclosure in harsh industrial conditions (construction dust, high humidity, chemical suspensions) exposes sensitive electronics to the risk of immediate damage and increases the likelihood of personnel injury due to electric shock or an arc flash.

The ARCA T transparent door elegantly solves this problem. It allows engineers and operators to instantly read instrument values, check indicator status, and monitor controllers without compromising the enclosure’s seal. Fibox states that it uses specialized UV-protection technologies, thanks to which the polycarbonate retains its crystal clarity for years, without yellowing or becoming cloudy under direct sunlight.

Polycarbonate vs stainless steel

For a long time, stainless steel was considered the gold standard for harsh operating conditions. However, Fibox Arca T clearly demonstrates why high-quality polycarbonate is becoming the preferred choice of modern engineers:

• weight and logistics: polycarbonate enclosures weigh two to three times less than comparable steel ones. This not only significantly reduces transportation costs on a global scale, but also greatly simplifies installation on site. One installer can easily lift and secure an enclosure that, in the case of steel, would require the effort of two people or lifting equipment;
• corrosion resistance: despite protective coatings, metal can eventually start to rust, especially in high-humidity environments, marine installations, or chemical plants, if the coating is accidentally scratched. Polycarbonate is a 100% non-corroding material;
• impact resistance with “shape memory”: polycarbonate has high elasticity. Under a strong impact exceeding nominal loads, it can flex and return to its original shape. A steel enclosure in a similar situation would receive an irreversible dent, which may damage internal equipment or compromise the door’s seal against the gasket;
• ease of modification: during installation, it is often necessary to drill additional holes for cable glands. Drilling steel is a labor-intensive process requiring special tools and mandatory subsequent anti-corrosion treatment of the edges. Polycarbonate is easily drilled with standard tools, and the resulting cut does not require additional rust protection;
• radio transparency: in the era of wireless technologies (WiFi, 5G, LoRaWAN), data transmission is critical. A metal cabinet acts like a Faraday cage, blocking radio signals and requiring the antenna to be routed outside. Polycarbonate allows radio waves and electromagnetic signals to pass through freely, making it possible to place transmitters and antennas inside the enclosure. This not only improves aesthetics, but also protects delicate antennas from vandalism and bad weather.

Design features and ease of use

The Fibox Arca T series is designed down to the smallest details for the convenience of panel builders and end users. The door opens to 120°, providing unobstructed access to the interior during installation and service work. Special patented hinges make assembly easy, and the appearance neat and modern.

Users can choose from several locking mechanisms: from standard DB 3 (Double-bit) locks with two locking points to an ergonomic swing handle that improves access control convenience. Reliable 2 mm galvanized steel mounting plates are also available, as well as wall-mounting brackets with different offsets and kits for pole or mast mounting.

A specially developed design with double angles and molded stiffening ribs gives the enclosure additional stability. All wall-mounting points are located outside the sealing contour. This eliminates the risk of leakage through mounting holes and guarantees full compliance with IP66 throughout the entire service life.

Conclusion

The Fibox Arca T enclosure is not just a plastic box, but a high-tech engineering solution that meets the strictest industrial requirements. The launch of a series featuring the largest integrated transparent door on the market is a direct response to the need for safer, faster, and more visual monitoring of control systems.

Combining excellent protection against dust and moisture, resistance to UV radiation and extreme temperatures, as well as light weight and complete immunity to corrosion, Fibox Arca T confidently outperforms metal alternatives. This enclosure is ideally suited for renewable energy systems, telecommunications equipment, water treatment facilities, heavy engineering, and other fields where uncompromising reliability is required alongside visual inspection.