DAT70505U 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 5 kV isolation across contacts with rhodium contact material, providing low contact resistance of 50 mO (typical 15 mO) and a maximum switching voltage of 1000 V DC or AC peak. It operates with a 5V DC coil requiring a must-operate voltage of 3.7V and a must-release voltage of 0.5V, with operate and release times of 3.0 ms and 2.0 ms respectively when a diode is fitted. The relay supports a maximum switching power of 50 W and maximum switching current of 3 A, with excellent AC characteristics and capacitance across contacts of less than 0.2 pF. Common applications include cardiac defibrillators, test equipment, and high-voltage power supplies where high isolation, low contact resistance, and reliable switching are essential.