Compact DC surge protective device for solar PV systems designed to limit surge voltage on DC lines and help protect panels, inverters, and downstream equipment. Key benefits Protects against surge voltage on DC circuits in solar installations by diverting transient overcurrent away from sensitive components. Designed for parallel installation on the DC network; recommended at both the solar array side and the inverter or converter side, especially when DC cable runs are long or routed externally. energy metal oxide varistors fitted with thermal disconnectors and visible failure indicators for safe endoflife signaling and easy maintenance. Available in 2P and 3P configurations to match different PV system layouts and grounding schemes. Compact and suitable for custom integration into existing DC distribution enclosures. Main specifications Model: TOSPDC Type: DC surge protective device Available poles: 2P or 3P Nominal discharge current: 20 kA Maximum discharge current: 40 kA Maximum continuous operating voltage: 1000 V DC Safety creepage distance: 10 mm Is smart device: No : Yes Installation and use Install in parallel with the DC supply lines to be protected. Typical mounting points are at the PV string combiner or junction box and at the inverter DC input. Use on rooftop PV arrays, groundmounted solar farms, offgrid battery charging systems, and commercial or industrial PV installations with long external DC wiring. Periodically inspect the builtin failure indicators and the device if the indicator shows end of life. Practical application scenarios Residential rooftop PV: Protect the string combiner and inverter inputs against lightninginduced and switching transients on external cable runs. Commercial or utilityscale arrays: Provide local overvoltage protection at combiner boxes and at the inverter feed to reduce risk of equipment damage across multiple strings. Offgrid solar and batterycharging systems: Protect DC charge inputs and power electronics where reliable transient suppression extends component life. Why choose this SPD Purposebuilt for DC and photovoltaic applications with a 1000 V DC continuous rating. Robust surge handling capacity up to 40 kA peak and 20 kA nominal discharge current for frequent transient events. Builtin thermal disconnectors and failure indicators improve operational safety and simplify maintenance and replacement planning. Configurable pole options and supply make it adaptable to a wide range of PV system designs. Ordering and compatibility Specify model TOSPDC and required pole configuration (2P or 3P) when ordering. Suitable for use in DC photovoltaic power supply systems and other DC power networks requiring surge protection up to 1000 V DC.