Ambient temperature: -40 to +80 °C (NC valve), -40 to +55 °C (NO valve). Permissible voltage tolerance: +10 to -15%. Dual frequency coils: ±10%. AC coils for 220-230 / 380-400 V: +6 to -15%, as dual frequency coils: +6 to -10%. Protection class: IP 67. Terminal box: The wires are connected to screw terminals in the terminal box. The terminal box has a Pg 13.5 cable gland for 6-14 mm cables. Maximum cable cross-section: 2.5 mm². Holding 10 W/21 VA, inrush 44 VA.