DAR72405TU is a UL-approved, normally open high-voltage reed relay from the DA(UL) series designed for high-reliability applications requiring excellent isolation and switching performance. This relay features 5kV isolation voltage with tungsten contacts, which enable switching of higher voltages up to 5000V DC or AC peak, and carries a maximum current of 2A with a maximum switching power of 50W. The relay incorporates a 4-pin 0.635" square configuration with wire-wrap turret connection for the high-voltage terminals, operates on a 5V DC coil with a must-operate voltage of 3.7V and a must-release voltage of 0.5V, and exhibits an operate time of 3.0ms and release time of 2.0ms. With a contact resistance of 250mO (typical 100mO) and insulation resistance of 10¹°O, this relay is well-suited for cardiac defibrillators, test equipment, and high-voltage power supplies where reliability and isolation performance are critical.