Schneider Electric XB4BVB4 Harmony XB4 red LED pilot light 22 mm 24 V AC/DC. The Schneider Electric XB4BVB4 is a Harmony XB4 complete pilot light with chromium plated metal bezel, plain red lens and an integral universal LED rated 24 V AC/DC 50/60 Hz, fitting the standard 22.5 mm panel hole. The XB4BVB4 consumes 18 mA, is rated 250 V insulation voltage and 4 kV impulse withstand, and its LED gives a service life of 100,000 h at rated voltage and 25 degrees C, wired through screw clamp terminals X1-X2. Sealing is IP66, IP67, IP69 and IP69K with an operating range of -40 to 70 degrees C. In Egypt and the GCC the 24 V version is specified whenever indication is driven from a PLC or from an extra-low-voltage control supply, making the XB4BVB4 the usual fault or stopped indicator on PLC panels, water and wastewater plants, cement, oil and gas and food and beverage machinery.