AC 420V Home Surge Protector Modular Design with DIN Rail Installation Features: The housing is made of flame retardant plastic material, which is durable and safe to use. Precise electronic components inside, providing long service life and stable performance. High quality terminals, with good electrical conductivity. DIN rail installation, flexible to use, convenient to assemble. Compact size and light weight; Modular design, easy to maintain. Note: 1. Installation should only be carried out by a qualified electrician. 2. The size and color may be slightly different due to manual measurement and different light conditions. Thank you for your understanding. Features: Pole number: 2P + 2P/ 4P (optional) Color: Gray Material of housing: plastic Voltage: 420V AC Imax: 40KA In:20KA High: 1.8KV 3C rated voltage range: 50V < Voltage 440V Item size: 2P (each): 35 * 65 * 90 mm / 1.38 * 2.56 * 3.54 inch 4P: 70 * 65 * 90mm / 2.76 * 2.56 * 3.54in Package size: 9.8 * 7.6 * 7.3cm / 3.86 * 2.99 * 2.87in Package weight: 2P+2P: 420 g / 14.81 oz 4P: 383 g / 13.50 oz List of packages : 2*2P surge protection device