Panel integration and environmental limits
Ambient operating temperature is -5 to 55 °C, so in a sealed cabinet with other heat sources, check the internal temperature rise — derating may be needed above 55 °C. Storage range is wider (-60 to 80 °C), which matters for spares held on the shelf. Altitude rating is 3000 m without derating; above that, dielectric and thermal margins shrink.
Switching timing and protection class
That is critical for reversing or star-delta starters where a momentary short-circuit across phases must be prevented — the contactor ensures one set breaks before the other makes. IP2X finger protection means the contactor body prevents access to live parts with a finger-sized probe, acceptable for enclosed panels but not for open mounting.