Built-in cooling unit Rittal SK 3303.518 — 550 W, 115 V, 60 Hz, steel housing, grey

The Rittal SK 3303.518 is a built-in cooling unit engineered for temperature control inside electrical enclosures and control cabinets. Delivering 550 W of cooling power at 115 V and 60 Hz, this unit helps maintain stable operating temperatures for sensitive electronic and electrical components. The housing is steel with a grey finish, designed to provide mechanical protection and easy integration into industrial and commercial installations.

Advantages

This cooling unit provides a rated cooling capacity of 550 W suitable for compact to medium-density installations. Its 115 V, 60 Hz electrical rating aligns with North American mains supplies for straightforward power compatibility. The steel housing offers durability and helps protect internal components from mechanical impact while the built-in design simplifies mounting within enclosures and cabinets.

Suitable for

• Cooling electrical enclosures and control cabinets in industrial environments
• Protecting sensitive electronic components from overheating
• Use in installations requiring 115 V / 60 Hz supply
• Indoor and protected outdoor enclosures when installed per enclosure rating

When it may not be suitable

This unit is intended for integration into enclosures; it is not a stand-alone room air conditioner and is not suitable for cooling large open spaces. Applications that require different mains voltages, frequencies, or higher cooling capacities than 550 W will need an alternative model. Also verify enclosure ingress protection and environmental requirements before selection.

Key specifications

• Cooling capacity: 550 W
• Supply voltage and frequency: 115 V, 60 Hz
• Housing material: Steel
• Housing colour: Grey
• Mounting type: Built-in for electrical enclosures/control cabinets

How to use

Mount the cooling unit into the designated cut-out or mounting position of the electrical enclosure according to the enclosure manufacturer and unit installation instructions. Connect to a compatible 115 V, 60 Hz power supply via appropriate wiring and protective devices. Set thermostat or control elements (if provided) to the desired setpoint and verify airflow and temperature drop across the enclosure. Perform commissioning checks to confirm stable operation and monitor for proper condensate drainage or filtration if applicable.

What to consider before purchase

• Required cooling capacity for the enclosure and heat-generating components
• Compatibility with 115 V / 60 Hz mains supply
• Enclosure cut-out and mounting dimensions for built-in installation
• Ingress protection and environmental conditions at installation site

Usage recommendations

Ensure regular maintenance such as cleaning filters, checking fans and airflow paths, and verifying electrical connections. Match the unit to the enclosure thermal load and follow the manufacturer's mounting and ventilation guidelines to achieve reliable temperature control.