The PF-ET1-25 is a POWrFuse™ photovoltaic (gPV) power fuse designed to UL 248-19 standard for photovoltaic applications. This PCB-mounted fuse variant features a nominal I²t rating of 2229 A²s (measured at 20 kA / 500 VDC) and power dissipation of 1.78 W at 70% rated current and 4.56 W at 100% rated current. The fuse operates over an ambient temperature range of -55°C to +125°C and is rated for 1000 VDC with an interrupting rating of up to 20 kA. It is RoHS compliant and halogen-free, with cULus agency recognition. The PF-ET1-25 is ideal for solar power systems and renewable energy applications requiring reliable overcurrent protection with fast clearing characteristics.