DAT71205FU is a UL-approved normally open high-voltage relay from the DA(UL) series designed for high-reliability applications requiring excellent isolation and switching performance. The relay features a 5 kV isolation voltage across contacts with a choice of rhodium or tungsten contact materials; rhodium contacts provide low contact resistance (50 mO typical), while tungsten contacts enable higher voltage switching up to 5000 V DC or AC peak. Key electrical characteristics include a maximum switching power of 50 W, maximum switching current of 3 A (rhodium) or 2 A (tungsten), maximum carry current of 4 A (rhodium) or 3 A (tungsten), and capacitance across contacts less than 0.2 pF. The relay operates with a 5 V DC coil, featuring a must-operate voltage of 3.7 V, must-release voltage of 0.5 V, operate time of 3.0 ms, and release time of 2.0 ms, with an operating temperature range of -20°C to +70°C. This relay is ideal for cardiac defibrillators, test equipment, high-voltage power supplies, and other applications demanding high isolation, low contact resistance, and reliable switching performance.