Rittal SK3478.801 Blue e+ S wall-mounted cooling unit providing 300 W cooling output with 110–240 V AC multi-voltage operation, IP55 internal circuit protection and low-GWP R-1234yf refrigerant without an integrated condensate evaporator.
The Rittal SK3478.801 is a compact Blue e+ S wall-mounted enclosure cooling unit designed for energy-efficient thermal management of industrial electrical and automation enclosures. Delivering 0.3 kW cooling output, it combines Rittal's Blue e+ S technology with a slim 159 mm depth, making it particularly suitable for control cabinets where installation space is limited.
The SK3478.801 operates across a wide 110–240 V AC single-phase 50/60 Hz voltage range, supporting use in internationally deployed machinery and equipment. Its e+ controller provides integrated temperature regulation, while equal internal and external airflow of 366.6 m³/h supports effective heat transfer from temperature-sensitive electrical and electronic components.
Using low-GWP R-1234yf refrigerant, the SK3478.801 provides modern refrigeration-based enclosure cooling without an integrated electric condensate evaporator. With a sheet steel housing, IP55 internal circuit protection and compact dimensions of 300 × 570 × 159 mm, it provides an effective cooling solution for PLCs, power supplies, industrial computers and other heat-generating equipment.
Modern PLCs, power supplies, industrial computers and control electronics can produce significant heat even in compact electrical enclosures. The Rittal SK3478.801 combines active refrigeration cooling with Blue e+ S technology to transfer this heat away from sensitive equipment while maintaining a closed internal enclosure air circuit.
Its wide multi-voltage input and compact dimensions make the SK3478.801 particularly suitable for machinery intended for international markets. The R-1234yf refrigerant has a very low global warming potential, while the e+ controller automatically regulates cooling according to enclosure temperature requirements for dependable industrial operation.
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| Mounting Type | Wall / door | |
|---|---|---|
| Device Type | Wall / door-mounted cooling unit | |
| Refrigerant Type | R123 | |
| Coil / Supply Voltage | 110–240 V AC, 1-phase | |
| Voltage | 110-240 V AC | |
| Cooling Output (W) | 300 W | |
| HS Code | 84158200 | |
| Manufacturer | Rittal | |
| Series | Blue e+ S | |
| Model | SK3478.801 | |
| Article number | SK 3478.801 | |
| Product type | Wall-mounted enclosure cooling unit | |
| Device type | Air/air | |
| Mounting type | Wall-mounted | |
| Cooling output L35/L35, 50 Hz | 0.3 kW | |
| Cooling output L35/L35, 60 Hz | 0.3 kW | |
| Cooling output L35/L50, 50 Hz | 0.14 kW | |
| Cooling output L35/L50, 60 Hz | 0.14 kW | |
| Rated operating voltage | 110–240 V AC | |
| Voltage tolerance | 99–264 V AC | |
| Phases | 1-phase | |
| Frequency | 50 / 60 Hz | |
| Rated power input | 0.22 kW | |
| Power consumption L35/L35, 50 Hz | 0.15 kW | |
| Power consumption L35/L35, 60 Hz | 0.15 kW | |
| Power consumption L35/L50, 50 Hz | 0.17 kW | |
| Power consumption L35/L50, 60 Hz | 0.17 kW | |
| External air throughput | 366.6 m³/h | |
| Internal air throughput | 366.6 m³/h | |
| Energy efficiency ratio L35/L35, 50 Hz | 1.8 | |
| Energy efficiency ratio L35/L35, 60 Hz | 1.8 | |
| Internal circuit protection | IP55 | |
| NEMA rating | UL Type 1 / Type 12 | |
| Refrigerant | R-1234yf | |
| Refrigerant charge | 0.135 kg | |
| Global warming potential | 0.5 | |
| Controller | e+ controller | |
| Factory temperature setting | 35 °C | |
| Temperature setting range | 20–50 °C | |
| Operating temperature range | -20–60 °C | |
| Heat-pipe operating temperature range | -20–45 °C | |
| Storage temperature range | -40–70 °C | |
| Maximum permissible operating pressure | 32 bar | |
| Required mounting cut-out (W × H) | 280 × 550 mm | |
| Dimensions (W × H × D) | 300 × 570 × 159 mm | |
| Net weight | 12.2 kg | |
| Gross weight | 12.5 kg | |
| Condensate evaporator | Not integrated |
The SK3478.801 provides 0.3 kW cooling output under L35/L35 conditions at both 50 Hz and 60 Hz. Under L35/L50 conditions, cooling output is 0.14 kW.
The Blue e+ S cooling unit operates from 110–240 V AC, single-phase, at 50/60 Hz, with a permitted supply tolerance extending from 99 to 264 V AC.
The SK3478.801 uses R-1234yf refrigerant with a charge of 0.135 kg. R-1234yf has a global warming potential of just 0.5.
No. The SK3478.801 is the Blue e+ S 300 W version without an integrated electric condensate evaporator, so condensate must be managed according to the installation requirements and Rittal's mounting instructions.
The cooling unit measures 300 mm wide, 570 mm high and 159 mm deep. The required mounting cut-out is 280 × 550 mm.
Rittal Blue e+ S cooling units combine compact enclosure climate control, multi-voltage capability, intelligent temperature regulation and low-GWP refrigerant technology to support efficient and reliable operation of modern industrial machinery and automation systems.
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