Siemens SIMATIC ET 200SP Manual page 26

Product overview
3.3 Permissible ambient temperatures up to 1000 m above sea level.
If you use the motor starter in accordance with UL requirements, always use a fan
regardless of the ambient temperature. The figure below shows the derating curves of an
ET 200SP direct-on-line and reversing starter according to UL/CSA requirements:
26
Motor starter (3RK1308-0**00-0CP0)
Manual, 12/2016, A5E34821005002A/RS-AB/002