Schneider Electric XB4BA31 Harmony XB4 green flush pushbutton 22 mm spring return 1 NO. The Schneider Electric XB4BA31 is a complete Harmony XB4 pushbutton with a chromium plated metal bezel and Zamak fixing collar for standard 22.5 mm panel mounting. The XB4BA31 provides a green flush unmarked operator with spring return action and one slow-break NO contact, rated 10 A conventional free air thermal current, 600 V rated insulation voltage and 6 kV impulse withstand, using silver alloy (Ag/Ni) contacts and screw clamp terminals for 0.22 to 2.5 mm2 conductors. Mechanical durability is 10,000,000 cycles and the front face is sealed to IP66, IP67, IP69 and IP69K for operation from -40 to 70 degrees C. Panel builders in Egypt and the Gulf specify the XB4BA31 as the standard start or run button in motor control centres, pump and compressor panels, water treatment kiosks, cement plant local control stations and food and beverage machinery.