DC SPD (Surge Protective Device) 500V is a critical safety component designed to protect Direct Current (DC) electrical systems—most commonly Solar Photovoltaic (PV) installations—from voltage spikes.1 These spikes are typically caused by lightning strikes (either direct or nearby) or switching surges within the electrical grid.
Key Specifications & Purpose
The 500V rating indicates the Maximum Continuous Operating Voltage (2$U_c$).3 This means the device is specifically engineered for small-to-medium solar arrays where the string voltage does not exceed 500V DC
.500v
IMAX: 40KA
In: 20KA
Up: 3.2KV
Specifications
Key Features
Lightweight Design
FeatureTypical Value (500V Model)Max Operating Voltage ($U_c$)500V DCNominal Discharge Current ($I_n$)20kAMax Discharge Current ($I_{max}$)40kAMounting Type35mm DIN RailOperating Temperature-40°C to +80°C
What’s in the box
500v DC SPD
Specifications
SKU: ST143IP727YIDNAFAMZ
Weight (kg): 0.2
Color: Orange
Main Material: Plastic
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