Product: DC SPD Surge Protective Device 40KA, Color 1A Overview A DC surge protective device designed for photovoltaic and other DC power systems. Available for 500V and 1000V systems and offered in 2P and 3P configurations. This listing is for the 40KA discharge capacity model, color code 1A. Key benefits Protects DC equipment from transient overvoltages caused by lightning strikes and switching events, helping preserve sensitive inverters and other components. discharge capacity reduces the magnitude of surges passed to downstream equipment, lowering the likelihood of damage and system interruptions. Modular options allow selection of 20KA, 40KA, or 60KA depending on site exposure and system requirements. Features and specifications Type: DC Surge Protective Device SPD, suitable for solar PV applications. Voltage compatibility: 500V and 1000V DC systems. Pole options: 2P or 3P configurations to match DC wiring arrangements. Discharge ratings available: 20KA, 40KA, 60KA. This product is the 40KA version. Color code: 1A for easy identification during installation and maintenance. Function: Diverts and limits transient overvoltage on the DC line to protect downstream equipment. Why choose this model Balanced performance for many PV installations where moderate to surge capacity is needed. Flexible compatibility with common DC system voltages and wiring configurations. Clear color coding simplifies inventory and field identification. Typical applications Rooftop solar system combiner boxes to protect inverter inputs and string cabling from transient surges. Groundmounted solar farms where long DC runs and exposure to lightning risk require higher discharge capacity. DC power distribution and battery bank lines in offgrid or hybrid systems to reduce transient stress on controllers and inverters. Installation and use notes Mount at the PV combiner box or immediately upstream of the inverter DC input for most effective protection. Select the appropriate pole configuration and discharge rating based on system voltage, array size, and site exposure. Coordinate SPD placement with system fusing and disconnects during design and installation. What is included DC SPD unit, 40KA version, color 1A, in selected 2P or 3P configuration for either 500V or 1000V DC systems. This DC SPD is intended for use where reliable transient protection is required on DC solar and related power systems. Select the correct voltage, pole configuration, and discharge rating to meet your system needs.