SK3237.110 Rittal TopTherm fan-and-filter unit 20/25 m/h 115 V 1~ 50/60 Hz

Why Choose the Rittal SK 3237.110 TopTherm Fan-and-Filter Unit?

The Rittal SK 3237.110 is a compact TopTherm fan-and-filter unit designed for reliable forced-air ventilation of industrial electrical enclosures. Its diagonal fan technology provides high pressure stability and a more consistent airflow, while the diagonal outflow direction promotes even heat dissipation throughout the enclosure.

Operating from a 115 V AC, single-phase, 50/60 Hz supply, the SK 3237.110 delivers an unimpeded airflow of 20 m³/h at 50 Hz and 25 m³/h at 60 Hz with its chopped-fibre filter mat. This makes it well suited to control panels and automation enclosures where ambient air can be used to remove low to moderate internal heat loads.

The complete ready-to-install unit measures 116.5 × 116.5 mm, requires a 92 × 92 mm mounting cut-out and has an installation depth of 43 mm. Standard protection is IP54 with the chopped-fibre filter, while a compatible hose-proof hood can increase protection to IP56 for more demanding environments.

Key Advantages

• Compact 115 V TopTherm fan-and-filter unit for industrial enclosure ventilation.
• Delivers 20 m³/h at 50 Hz and 25 m³/h at 60 Hz.
• IP54 protection with the supplied chopped-fibre filter mat.
• Diagonal fan technology provides improved pressure stability and consistent airflow.
• Diagonal outflow helps distribute cooling air evenly throughout the enclosure.
• Tool-free surface mounting supports fast and straightforward installation.
• Low power consumption of 11 W at 50 Hz and 9 W at 60 Hz.
• Supplied as a complete ready-to-install unit including filter mat.

Key Features

• Rittal TopTherm fan-and-filter unit.
• Wall-mounted design.
• Axial fan with shaded-pole motor.
• 115 V AC, 1~, 50/60 Hz rated operating voltage.
• 20 m³/h unimpeded airflow at 50 Hz.
• 25 m³/h unimpeded airflow at 60 Hz.
• Airflow with one SK 3237.200 outlet filter: 15 m³/h at 50 Hz and 18 m³/h at 60 Hz.
• Airflow with two SK 3237.200 outlet filters: 16 m³/h at 50 Hz and 20 m³/h at 60 Hz.
• IP54 with chopped-fibre filter.
• IP56 with chopped-fibre filter and compatible hose-proof hood.
• Operating temperature range of -15 to +55 °C.
• RAL 7035 finish.

Reliable Filtered Ventilation for Electrical Enclosures

Fan-and-filter units provide an efficient method of removing excess heat when the ambient temperature is sufficiently below the required enclosure temperature. The Rittal SK 3237.110 draws filtered ambient air into the enclosure, helping dissipate heat generated by electrical and electronic equipment while the filter mat reduces the ingress of airborne dust.

Rittal's diagonal fan technology improves pressure stability and helps maintain a more consistent airflow as resistance within the ventilation system changes. When paired with a compatible SK 3237.200 outlet filter, the fan-and-filter unit establishes a controlled airflow path through the enclosure for effective component cooling.

Typical Applications

• Industrial electrical control enclosures.
• Automation and PLC control panels.
• Machine-building electrical cabinets.
• Relay and power-supply enclosures.
• Switchgear and distribution cabinets.
• Small electronic equipment enclosures.
• 115 V industrial control systems.
• Applications requiring filtered forced-air enclosure ventilation.