AC 420V Household Surge Arrester Device Modular Design with DIN Rail Installation Features: The case is made of flame retardant plastic material, 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. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Pole Number: 2P+2P/ 4P (Optional) Color: Grey Case Material: Plastic Voltage: AC 420V Imax: 40KA In:20KA Up: 1.8KV 3C Rated Voltage Range: 50VVoltage440V Item Size: 2P (Each): 35 * 65 * 90mm / 1.38 * 2.56 * 3.54in 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: 420g / 14.81oz 4P: 383g / 13.50oz Package List: 1 * 4P Surge Protective Device