SK3105.390 Rittal Enclosure heater 400/415 W 230 V 1~ 50/60 Hz WHD: 103x200x103mm

Why Choose the Rittal SK3105.390 Enclosure Heater with Fan?

The Rittal SK3105.390 is a high-output enclosure heater with integrated fan, designed to regulate relative humidity, maintain suitable internal temperatures and help prevent condensation inside electrical and industrial enclosures. By keeping temperatures above the dew point, the heater helps protect electrical and electronic components against moisture-related corrosion and short-circuit damage.

Providing a continuous thermal output of 400-415 W at 10 °C, the SK3105.390 combines a PTC heating element with an integrated fan to distribute warm air throughout the enclosure. The fan-assisted design is particularly suitable for applications requiring effective heat circulation, helping reduce temperature differences around sensitive electrical, control and automation equipment.

The heater operates from a 230 V, 1~, 50/60 Hz supply and measures just 103 × 200 × 103 mm. It features a quick-connection terminal, IP20 protection, Class II all-insulated construction and an operating temperature range of -33 °C to +65 °C, providing a compact and practical climate-control solution for industrial enclosure installations.

Key Advantages

• High continuous thermal output of 400-415 W at 10 °C.
• Integrated fan promotes effective warm-air circulation throughout the enclosure.
• Helps prevent condensation, corrosion and moisture-related electrical faults.
• PTC heating technology provides dependable enclosure heating.
• Compact 103 × 200 × 103 mm dimensions simplify integration into control cabinets.
• Quick-connection terminal supports straightforward electrical installation.
• Wide operating temperature range of -33 °C to +65 °C.
• Class II all-insulated construction for electrical protection.

Key Features

• Rittal SK enclosure heater with fan.
• 400-415 W continuous thermal output at an ambient temperature of 10 °C.
• 230 V single-phase AC rated operating voltage.
• 50/60 Hz operating frequency.
• Integrated fan for forced-air heat distribution.
• PTC heater supplied with fan and assembly parts.
• Quick-connection terminal for electrical connection.
• IP20 protection to IEC 60529.
• Protection Class II, all-insulated.
• 6 A miniature circuit-breaker/fuse pre-fuse requirement.
• Compact footprint for installation within industrial enclosures.
• Suitable for use with a thermostat or hygrostat where controlled heating is required.

Effective Enclosure Heating and Condensation Control

Changes in ambient temperature can cause moisture to condense inside electrical enclosures when internal surfaces fall below the dew point. The Rittal SK3105.390 provides controlled heat to help maintain the enclosure temperature and regulate relative humidity, reducing the risk of condensation that could otherwise contribute to corrosion, insulation deterioration or electrical short circuits.

The integrated fan improves heat distribution around the enclosure, making this model particularly useful where higher heating output is required. Rittal recommends using a suitable thermostat for precise enclosure temperature control, while a hygrostat can be used when heating is primarily required to prevent condensation. In larger enclosures, multiple lower-output heaters may provide more even heat distribution depending on the installation requirements.

Typical Applications

• Industrial electrical and control enclosures.
• Factory automation cabinets.
• Machine control panels.
• Outdoor and cold-environment enclosure installations.
• Electrical cabinets exposed to temperature fluctuations.
• Condensation prevention around sensitive electrical equipment.
• Process control and instrumentation enclosures.
• OEM machinery and automated production equipment.