The PS3-B+C-320 Surge Arrestor with Type 1+2, 3 Poles, 320VAC, DIN, -40÷80°C, and IP20 rating, manufactured by OBO BETTERMANN is an electronic part designed to protect electrical systems and equipment from transformer inrush currents and line surge transients. This Surge Arrestor is suitable for use in DIN and lay in mounting systems and features a 3-pole design, 320VAC operating voltage, and an operating temperature range of -40÷80°C. It also has an IP20 rating for protection against objects greater than 12.5mm.