SK3387.540 Rittal Blue e cooling unit Roof-mounted 3.8 kW 400/460 V 3~ 50/60 Hz Sheet steel

Why Choose the Rittal SK3387.540 Blue e Roof-Mounted Cooling Unit?

The Rittal SK3387.540 is a high-performance TopTherm Blue e roof-mounted enclosure cooling unit designed to provide reliable climate control for electrical and industrial control enclosures. As part of the proven Rittal Blue e cooling unit series, it combines efficient refrigeration technology with an integrated e-Comfort controller and automatic electrical condensate evaporation.

Designed for demanding industrial environments, the SK3387.540 provides dependable cooling for sensitive electrical and electronic equipment while helping maintain stable enclosure temperatures. Its roof-mounted configuration saves valuable enclosure wall space, while the hydrophobic RiNano-coated condenser supports efficient operation and reduced maintenance requirements.

With a total cooling output of 3.8 kW at 50 Hz and up to 4 kW at 60 Hz, together with a 400 V three-phase 50 Hz or 460 V three-phase 60 Hz supply, the SK3387.540 is well suited to industrial control panels, automation systems and machinery containing heat-generating electrical components.

Key Advantages

• High-capacity roof-mounted enclosure cooling unit for industrial applications.
• 3.8 kW cooling output at L35 L35 / 50 Hz and 4 kW at 60 Hz.
• 400 V, 3-phase, 50 Hz / 460 V, 3-phase, 60 Hz operating supply.
• Integrated e-Comfort controller for precise enclosure temperature regulation.
• Integral electrical condensate evaporation simplifies condensate management.
• Hydrophobic RiNano-coated condenser supports efficient, low-maintenance operation.
• Can be linked to the Rittal IoT Interface using a compatible Blue e IoT adaptor.
• Roof mounting preserves enclosure side-wall space for other equipment and accessories.

Key Features

• Rittal TopTherm Blue e cooling unit series.
• 3.8 kW total cooling output at 50 Hz.
• 4 kW total cooling output at 60 Hz.
• 400 V, 3~, 50 Hz / 460 V, 3~, 60 Hz rated operating voltage.
• 3,870 m³/h external and 1,420 m³/h internal unimpeded air flow.
• IP34 external circuit and IP54 internal circuit protection to IEC 60529.
• Integrated e-Comfort controller with factory temperature setting of +35 °C.
• Operating temperature range from +10 °C to +55 °C.
• Sheet steel construction finished in RAL 7035.
• Fully wired for connection using a plug-in terminal strip.

Reliable Climate Control for Industrial Enclosures

Industrial electrical enclosures often contain PLCs, variable speed drives, power supplies and other components that generate significant heat during operation. The Rittal SK3387.540 removes this excess heat and maintains controlled internal temperatures, helping protect sensitive equipment from thermal stress and supporting reliable machine operation.

The Blue e design combines powerful refrigeration with an e-Comfort controller, electrical condensate evaporation and separate internal and external air circuits. The roof-mounted format is particularly useful where enclosure side walls must remain unobstructed, while the unit's IoT connectivity options allow integration into modern monitoring and maintenance strategies.

Typical Applications

• Industrial electrical and automation control enclosures.
• PLC, drive and motor-control cabinets.
• Manufacturing and production machinery.
• Machine-tool control systems.
• Process automation and instrumentation panels.
• Power distribution and electrical control equipment.
• OEM machinery and factory automation systems.