MAIN CHARACTERISTICS range of product HARMONY XB4 product or component type LIGHT BLOCK device short name ZBW connections - terminals SCREW TERMINALS FOR LUG signalling type STEADY light source LED bulb base BA 9S light block supply INTEGRATED TRANSFORMER - 6 V light source colour WHITE [Us] rated supply voltage 400 V AC 50 HZ COMPLEMETARY CHARACTERISTICS service life 100000 H AT RATED VOLTAGE AND 25 C surge withstand 1 KV CONFORMING TO IEC 61000-4-5 compatibility code ZBW