
The Siemens KU21RADE0 iQ500 built-in fridge is the ideal choice for smaller households, modern kitchens or offices where compactness, practicality and top performance are the focus. With a usable volume of 134 litres, it provides plenty of space for everyday food storage, yet its compact dimensions make it easy to fit under the worktop. The elegant built-in design allows it to be integrated into the kitchen cabinet without disturbing the overall interior design. The Siemens KU21RADE0 iQ500 boasts German manufacturing quality, innovative features and energy-efficient operation. Thanks to the inverter compressor, the operation of the refrigerator is both quiet and stable, which contributes to the longer life of the appliance and the preservation of the freshness of food. The fridge has an energy class E and an annual energy consumption of 93 kWh. Practical features such as the StoragePlus 0 °C drawer for meat and fish, the autoAirflow even cooling and the softClosing door for gentle door opening bring maximum convenience in everyday use.

The Siemens KU21RADE0 iQ500 built-in refrigerator uses an intelligent inverter compressor that automatically adapts its performance to the current conditions, ensuring stable temperatures and energy-efficient operation. The autoAirflow system maintains constant air circulation, so food is cooled evenly on all shelves. The LED lighting provides a clear view of the entire fridge contents and helps with orientation even at night.

The Siemens KU21RADE0 iQ500 is equipped with softClosing, which ensures that the door closes gently and safely to avoid bumps and unwanted cold leaks. For longer freshness preservation of sensitive foods such as meat and fish, the storagePlus 0°C drawer is available. The shelves made of durable safetyGlass are easy to clean and safely catch spilled liquids. An audible door alarm is also included to alert you if the door is left open too long.


The Siemens KU21RADE0 iQ500 offers a cooling volume of 134 litres and a noise level of just 35 dB, ensuring quiet operation. The dimensions of the appliance are 82 × 59.8 × 54.8 cm (h × w × d), making it suitable for installation in kitchen units. The door hinges are placed on the right as standard, but the zero door rake means the fridge can be installed in narrow spaces. The appliance supports network connectivity via Home Connect so it can be remotely monitored and controlled, including integration into a Matter-compatible smart home.
Yes, on most models it is possible to change the door opening direction. We recommend consulting the user manual for your specific appliance for instructions or contacting an authorized service center.
Transporting the refrigerator lying down is not recommended as it can damage the compressor. If it is necessary, let the refrigerator stand upright for at least 24 hours after transport before plugging it in.
Yes, this is normal. The condenser, which dissipates heat from the inside of the refrigerator, is integrated into the side walls, causing them to heat up.
No, do not remove this cover. It is often made of a sturdy material resembling cardboard and serves as protection and insulation for the back of the appliance.
Yes, with new refrigerators, especially those with an inverter compressor, it is common for them to run longer initially to reach the set temperature. Modern compressors can operate for longer periods at lower power.
No, do not remove the plastic wrap, tape, or any other protective elements on components that are not explicitly marked for removal after transport. To be sure, check the installation manual.
Check if the drain hole at the back of the refrigerator is clogged. Increased moisture can also be caused by storing unwashed or unwrapped vegetables.
No Frost technology completely prevents ice buildup in the freezer through air circulation, so it never needs to be defrosted. Low Frost technology significantly reduces ice formation, but occasional manual defrosting is still necessary.
Yes, on most combination refrigerators, the freezer temperature can be adjusted independently of the cooling section. The optimal temperature for the freezer is -18°C.
Some models may activate these functions automatically after the door has been open for an extended period or when a large amount of new food is added, in order to quickly restore the optimal temperature.
Yes, this is part of the automatic defrost cycle. The water runs down into a drain hole and evaporates. Make sure the drain hole is not clogged.
This is not an error. The alarm indicates that the internal temperature has not yet reached the set level. Once the refrigerator cools down sufficiently, the alarm will turn off automatically.
The alarm can also indicate other conditions, such as an open door or a power failure. Check the display for a specific error code and consult the manual.
Check that the door is installed correctly and opens to a sufficient angle. The problem may also be due to improperly seated hinges.
Standard baking trays do not fit into most regular refrigerators. Some premium models may have a special compartment or flexible layout that allows for this.
On some models, usually those with two compressors or special features, it is possible to temporarily deactivate one of the compartments. This is not typically possible on standard models.
After transport, especially if it was not kept upright, it is recommended to let the appliance stand idle for 4–6 hours, ideally up to 24 hours, before plugging it into the power outlet.
On most models, the door must be opened more than 90° to comfortably remove the internal shelves and drawers. You can find precise information in the product's technical specifications.
For questions about Siemens large home appliances, you can find all the useful information here.
This is a built-in appliance, the front panel on the door is not included.
Siemens Aktiengesellschaft, Werner-von-Siemens-Straße 1, 80333 München, Spolková republika Německo, [email protected], +49 89 3803-5491
Specifications can be changed without notice. Images are for illustrative purposes only.