Safety fuse, photovoltaic Fuses, specifically designed for DC applications (eg. Photovoltaic strings).
This special PV Fuses enable you to protect various aspects of your PV power generation. This can be a string inverters, central inverters or even the modules directly to protect your circuits in combiner boxes. Use of these fuses range from free-standing solar farms, which have high ambient temperatures requirements, to residential installations, where compact size is important.
Parts as depicted in the photos.