NCB20+U4+U

General specifications Switching element function AC/DC NO/NC Rated operating distance 20 mm Installation flush Output polarity AC/DC Assured operating distance 0 ... 16.2 mm Reduction factor r Al 0.3 Reduction factor r 304 0.75 Nominal ratings Operating voltage DC 20 ... 300 V Operating voltage AC 20 ... 250 V Switching frequency 200 Hz VDC / 30 Hz VAC Hysteresis 3 ... 10 % Reverse polarity protection reverse polarity protected Short-circuit protection pulsing Voltage drop less than or equal to 8 V Momentary current (20 ms, 0.1 Hz) 0 ... 3000 mA Operating current 3 ... 400 mA Off-state current < 1.7 mA Indicators/operating means LED green Power on LED yellow output LED green/yellow Short circuit/overload indication Approvals and certificates UL approval cULus Listed, General Purpose CSA approval cCSAus Listed, General Purpose Ambient conditions Ambient temperature -25 ... 70 °C (-13 ... 158 °F) Storage temperature -25 ... 85 °C (-13 ... 185 °F) Mechanical specifications Connection type screw terminals Housing material PBT/metal Sensing face PBT Degree of protection IP68 Note 1) In the temperature range below 0 °C, permissible operating voltage U b 80...253 V Safety fuse less than or equal to 2 A (quick-blow) according to IEC 60127-2 Sheet 1 Recommendation: after a short circuit, check that the device is functioning correctly.